diff --git a/app/components/check_answers_summary_list_card_component.html.erb b/app/components/check_answers_summary_list_card_component.html.erb
index 3b4c4978a..31c3bffac 100644
--- a/app/components/check_answers_summary_list_card_component.html.erb
+++ b/app/components/check_answers_summary_list_card_component.html.erb
@@ -12,16 +12,22 @@
           <% summary_list.row do |row| %>
             <% row.key { get_question_label(question) } %>
             <% row.value do %>
-              <span class="govuk-!-margin-right-4"><%= get_answer_label(question) %></span>
+              <%= simple_format(
+                get_answer_label(question),
+                wrapper_tag: "span",
+                class: "govuk-!-margin-right-4",
+              ) %>
 
               <% extra_value = question.get_extra_check_answer_value(log) %>
 
-              <% if extra_value %>
-                <span class="govuk-!-font-weight-regular app-!-colour-muted"><%= extra_value %></span>
+              <% if extra_value && question.answer_label(log).present? %>
+                <%= simple_format(
+                  extra_value,
+                  wrapper_tag: "span",
+                  class: "govuk-!-font-weight-regular app-!-colour-muted",
+                ) %>
               <% end %>
 
-              <br>
-
               <% question.get_inferred_answers(log).each do |inferred_answer| %>
                 <span class="govuk-!-font-weight-regular app-!-colour-muted"><%= inferred_answer %></span>
               <% end %>
diff --git a/app/models/derived_variables/lettings_log_variables.rb b/app/models/derived_variables/lettings_log_variables.rb
index d42fb3903..aae49422d 100644
--- a/app/models/derived_variables/lettings_log_variables.rb
+++ b/app/models/derived_variables/lettings_log_variables.rb
@@ -94,6 +94,17 @@ module DerivedVariables::LettingsLogVariables
     self.vacdays = property_vacant_days
 
     set_housingneeds_fields if housingneeds?
+
+    if uprn_known&.zero?
+      self.uprn = nil
+    end
+
+    if uprn_confirmed&.zero?
+      self.uprn = nil
+      self.uprn_known = 0
+    end
+
+    reset_address_fields! if is_supported_housing?
   end
 
 private
@@ -229,4 +240,14 @@ private
     self.housingneeds_g = 0
     self.housingneeds_h = 0
   end
+
+  def reset_address_fields!
+    self.uprn = nil
+    self.uprn_known = nil
+    self.uprn_confirmed = nil
+    self.address_line1 = nil
+    self.address_line2 = nil
+    self.town_or_city = nil
+    self.county = nil
+  end
 end
diff --git a/app/models/form/lettings/pages/address.rb b/app/models/form/lettings/pages/address.rb
new file mode 100644
index 000000000..6f88bad0d
--- /dev/null
+++ b/app/models/form/lettings/pages/address.rb
@@ -0,0 +1,24 @@
+class Form::Lettings::Pages::Address < ::Form::Page
+  def initialize(id, hsh, subsection)
+    super
+    @id = "address"
+    @header = "What is the property's address?"
+  end
+
+  def questions
+    @questions ||= [
+      Form::Lettings::Questions::AddressLine1.new(nil, nil, self),
+      Form::Lettings::Questions::AddressLine2.new(nil, nil, self),
+      Form::Lettings::Questions::TownOrCity.new(nil, nil, self),
+      Form::Lettings::Questions::County.new(nil, nil, self),
+      Form::Lettings::Questions::PostcodeForFullAddress.new(nil, nil, self),
+    ]
+  end
+
+  def routed_to?(log, _current_user = nil)
+    return false if log.uprn_known.nil?
+    return false if log.is_supported_housing?
+
+    log.uprn_confirmed != 1 || log.uprn_known.zero?
+  end
+end
diff --git a/app/models/form/lettings/pages/property_local_authority.rb b/app/models/form/lettings/pages/property_local_authority.rb
index 2c64e3628..7692fd376 100644
--- a/app/models/form/lettings/pages/property_local_authority.rb
+++ b/app/models/form/lettings/pages/property_local_authority.rb
@@ -8,4 +8,12 @@ class Form::Lettings::Pages::PropertyLocalAuthority < ::Form::Page
   def questions
     @questions ||= [Form::Lettings::Questions::La.new(nil, nil, self)]
   end
+
+  def routed_to?(log, _current_user = nil)
+    return false if log.uprn_known.nil? && form.start_date.year >= 2023
+    return false if log.is_la_inferred?
+    return false if log.is_supported_housing?
+
+    true
+  end
 end
diff --git a/app/models/form/lettings/pages/uprn.rb b/app/models/form/lettings/pages/uprn.rb
new file mode 100644
index 000000000..7b6b90f1a
--- /dev/null
+++ b/app/models/form/lettings/pages/uprn.rb
@@ -0,0 +1,28 @@
+class Form::Lettings::Pages::Uprn < ::Form::Page
+  def initialize(id, hsh, subsection)
+    super
+    @id = "uprn"
+  end
+
+  def questions
+    @questions ||= [
+      Form::Lettings::Questions::Uprn.new(nil, nil, self),
+    ]
+  end
+
+  def routed_to?(log, _current_user = nil)
+    return false if log.is_supported_housing?
+
+    log.uprn_known == 1
+  end
+
+  def skip_text
+    "Enter address instead"
+  end
+
+  def skip_href(log = nil)
+    return unless log
+
+    "/#{log.model_name.param_key.dasherize}s/#{log.id}/address"
+  end
+end
diff --git a/app/models/form/lettings/pages/uprn_confirmation.rb b/app/models/form/lettings/pages/uprn_confirmation.rb
new file mode 100644
index 000000000..26cde2d97
--- /dev/null
+++ b/app/models/form/lettings/pages/uprn_confirmation.rb
@@ -0,0 +1,17 @@
+class Form::Lettings::Pages::UprnConfirmation < ::Form::Page
+  def initialize(id, hsh, subsection)
+    super
+    @id = "uprn_confirmation"
+    @header = "We found an address that might be this property"
+  end
+
+  def questions
+    @questions ||= [
+      Form::Lettings::Questions::UprnConfirmation.new(nil, nil, self),
+    ]
+  end
+
+  def routed_to?(log, _current_user = nil)
+    log.uprn.present? && log.uprn_known == 1
+  end
+end
diff --git a/app/models/form/lettings/pages/uprn_known.rb b/app/models/form/lettings/pages/uprn_known.rb
new file mode 100644
index 000000000..1ded1ba82
--- /dev/null
+++ b/app/models/form/lettings/pages/uprn_known.rb
@@ -0,0 +1,16 @@
+class Form::Lettings::Pages::UprnKnown < ::Form::Page
+  def initialize(id, hsh, subsection)
+    super
+    @id = "uprn_known"
+  end
+
+  def questions
+    @questions ||= [
+      Form::Lettings::Questions::UprnKnown.new(nil, nil, self),
+    ]
+  end
+
+  def routed_to?(log, _current_user = nil)
+    !log.is_supported_housing?
+  end
+end
diff --git a/app/models/form/lettings/questions/address_line1.rb b/app/models/form/lettings/questions/address_line1.rb
new file mode 100644
index 000000000..6f82edf45
--- /dev/null
+++ b/app/models/form/lettings/questions/address_line1.rb
@@ -0,0 +1,38 @@
+class Form::Lettings::Questions::AddressLine1 < ::Form::Question
+  def initialize(id, hsh, page)
+    super
+    @id = "address_line1"
+    @check_answer_label = "Address"
+    @header = "Address line 1"
+    @type = "text"
+    @plain_label = true
+    @question_number = 12
+  end
+
+  def hidden_in_check_answers?(log, _current_user = nil)
+    return true if log.uprn_known.nil?
+    return false if log.uprn_known&.zero?
+    return true if log.uprn_confirmed.nil? && log.uprn.present?
+    return true if log.uprn_known == 1 && log.uprn.blank?
+
+    log.uprn_confirmed == 1
+  end
+
+  def answer_label(log, _current_user = nil)
+    [
+      log.address_line1,
+      log.address_line2,
+      log.postcode_full,
+      log.town_or_city,
+      log.county,
+    ].select(&:present?).join("\n")
+  end
+
+  def get_extra_check_answer_value(log)
+    return unless log.is_la_inferred?
+
+    la = LocalAuthority.find_by(code: log.la)&.name
+
+    la.presence
+  end
+end
diff --git a/app/models/form/lettings/questions/address_line2.rb b/app/models/form/lettings/questions/address_line2.rb
new file mode 100644
index 000000000..16f7c8336
--- /dev/null
+++ b/app/models/form/lettings/questions/address_line2.rb
@@ -0,0 +1,13 @@
+class Form::Lettings::Questions::AddressLine2 < ::Form::Question
+  def initialize(id, hsh, page)
+    super
+    @id = "address_line2"
+    @header = "Address line 2 (optional)"
+    @type = "text"
+    @plain_label = true
+  end
+
+  def hidden_in_check_answers?(_log = nil, _current_user = nil)
+    true
+  end
+end
diff --git a/app/models/form/lettings/questions/county.rb b/app/models/form/lettings/questions/county.rb
new file mode 100644
index 000000000..360c0966c
--- /dev/null
+++ b/app/models/form/lettings/questions/county.rb
@@ -0,0 +1,13 @@
+class Form::Lettings::Questions::County < ::Form::Question
+  def initialize(id, hsh, page)
+    super
+    @id = "county"
+    @header = "County (optional)"
+    @type = "text"
+    @plain_label = true
+  end
+
+  def hidden_in_check_answers?(_log = nil, _current_user = nil)
+    true
+  end
+end
diff --git a/app/models/form/lettings/questions/la.rb b/app/models/form/lettings/questions/la.rb
index 3cafda054..b70e7590b 100644
--- a/app/models/form/lettings/questions/la.rb
+++ b/app/models/form/lettings/questions/la.rb
@@ -13,4 +13,8 @@ class Form::Lettings::Questions::La < ::Form::Question
   def answer_options
     { "" => "Select an option" }.merge(LocalAuthority.active(form.start_date).england.map { |la| [la.code, la.name] }.to_h)
   end
+
+  def hidden_in_check_answers?(log, _current_user = nil)
+    log.startdate && log.startdate.year >= 2023 && log.is_la_inferred?
+  end
 end
diff --git a/app/models/form/lettings/questions/postcode_for_full_address.rb b/app/models/form/lettings/questions/postcode_for_full_address.rb
new file mode 100644
index 000000000..015abc2e8
--- /dev/null
+++ b/app/models/form/lettings/questions/postcode_for_full_address.rb
@@ -0,0 +1,25 @@
+class Form::Lettings::Questions::PostcodeForFullAddress < ::Form::Question
+  def initialize(id, hsh, page)
+    super
+    @id = "postcode_full"
+    @header = "Postcode"
+    @type = "text"
+    @width = 5
+    @inferred_check_answers_value = [{
+      "condition" => {
+        "pcodenk" => 1,
+      },
+      "value" => "Not known",
+    }]
+    @inferred_answers = {
+      "la" => {
+        "is_la_inferred" => true,
+      },
+    }
+    @plain_label = true
+  end
+
+  def hidden_in_check_answers?(_log = nil, _current_user = nil)
+    true
+  end
+end
diff --git a/app/models/form/lettings/questions/town_or_city.rb b/app/models/form/lettings/questions/town_or_city.rb
new file mode 100644
index 000000000..f1eac8dff
--- /dev/null
+++ b/app/models/form/lettings/questions/town_or_city.rb
@@ -0,0 +1,13 @@
+class Form::Lettings::Questions::TownOrCity < ::Form::Question
+  def initialize(id, hsh, page)
+    super
+    @id = "town_or_city"
+    @header = "Town or city"
+    @type = "text"
+    @plain_label = true
+  end
+
+  def hidden_in_check_answers?(_log = nil, _current_user = nil)
+    true
+  end
+end
diff --git a/app/models/form/lettings/questions/uprn.rb b/app/models/form/lettings/questions/uprn.rb
new file mode 100644
index 000000000..efe9a4ea4
--- /dev/null
+++ b/app/models/form/lettings/questions/uprn.rb
@@ -0,0 +1,35 @@
+class Form::Lettings::Questions::Uprn < ::Form::Question
+  def initialize(id, hsh, page)
+    super
+    @id = "uprn"
+    @check_answer_label = "UPRN"
+    @header = "What is the property's UPRN"
+    @type = "text"
+    @hint_text = "The Unique Property Reference Number (UPRN) is a unique number system created by Ordnance Survey and used by housing providers and sectors UK-wide. For example 10010457355."
+    @width = 10
+    @question_number = 11
+  end
+
+  def unanswered_error_message
+    I18n.t("validations.property.uprn.invalid")
+  end
+
+  def get_extra_check_answer_value(log)
+    value = [
+      log.address_line1,
+      log.address_line2,
+      log.town_or_city,
+      log.county,
+      log.postcode_full,
+      (LocalAuthority.find_by(code: log.la)&.name if log.la.present?),
+    ].select(&:present?)
+
+    return unless value.any?
+
+    "\n\n#{value.join("\n")}"
+  end
+
+  def hidden_in_check_answers?(log, _current_user = nil)
+    log.uprn_known != 1
+  end
+end
diff --git a/app/models/form/lettings/questions/uprn_confirmation.rb b/app/models/form/lettings/questions/uprn_confirmation.rb
new file mode 100644
index 000000000..5b7bbd535
--- /dev/null
+++ b/app/models/form/lettings/questions/uprn_confirmation.rb
@@ -0,0 +1,34 @@
+class Form::Lettings::Questions::UprnConfirmation < ::Form::Question
+  def initialize(id, hsh, page)
+    super
+    @id = "uprn_confirmed"
+    @header = "Is this the property address?"
+    @type = "radio"
+    @answer_options = ANSWER_OPTIONS
+    @check_answer_label = "Is this the right address?"
+  end
+
+  ANSWER_OPTIONS = {
+    "1" => { "value" => "Yes" },
+    "0" => { "value" => "No, I want to enter the address manually" },
+  }.freeze
+
+  def notification_banner(log = nil)
+    return unless log&.uprn
+
+    {
+      title: "UPRN: #{log.uprn}",
+      heading: [
+        log.address_line1,
+        log.address_line2,
+        log.postcode_full,
+        log.town_or_city,
+        log.county,
+      ].select(&:present?).join("\n"),
+    }
+  end
+
+  def hidden_in_check_answers?(log, _current_user = nil)
+    log.uprn_known != 1 || log.uprn_confirmed.present?
+  end
+end
diff --git a/app/models/form/lettings/questions/uprn_known.rb b/app/models/form/lettings/questions/uprn_known.rb
new file mode 100644
index 000000000..6e3ce0302
--- /dev/null
+++ b/app/models/form/lettings/questions/uprn_known.rb
@@ -0,0 +1,21 @@
+class Form::Lettings::Questions::UprnKnown < ::Form::Question
+  def initialize(id, hsh, page)
+    super
+    @id = "uprn_known"
+    @check_answer_label = "UPRN known?"
+    @header = "Do you know the property UPRN?"
+    @type = "radio"
+    @answer_options = ANSWER_OPTIONS
+    @hint_text = "The Unique Property Reference Number (UPRN) is a unique number system created by Ordnance Survey and used by housing providers and sectors UK-wide. For example 10010457355.<br><br>
+    You can continue without the UPRN, but it means we will need you to enter the address of the property."
+  end
+
+  ANSWER_OPTIONS = {
+    "1" => { "value" => "Yes" },
+    "0" => { "value" => "No" },
+  }.freeze
+
+  def unanswered_error_message
+    I18n.t("validations.property.uprn_known.invalid")
+  end
+end
diff --git a/app/models/form/lettings/subsections/property_information.rb b/app/models/form/lettings/subsections/property_information.rb
index 6e20ea7cf..c20c2b27c 100644
--- a/app/models/form/lettings/subsections/property_information.rb
+++ b/app/models/form/lettings/subsections/property_information.rb
@@ -8,7 +8,7 @@ class Form::Lettings::Subsections::PropertyInformation < ::Form::Subsection
 
   def pages
     @pages ||= [
-      Form::Lettings::Pages::PropertyPostcode.new(nil, nil, self),
+      uprn_questions,
       Form::Lettings::Pages::PropertyLocalAuthority.new(nil, nil, self),
       Form::Lettings::Pages::FirstTimePropertyLetAsSocialHousing.new(nil, nil, self),
       Form::Lettings::Pages::PropertyLetType.new(nil, nil, self),
@@ -25,7 +25,22 @@ class Form::Lettings::Subsections::PropertyInformation < ::Form::Subsection
       Form::Lettings::Pages::NewBuildHandoverDate.new(nil, nil, self),
       Form::Lettings::Pages::PropertyMajorRepairs.new(nil, nil, self),
       Form::Lettings::Pages::PropertyMajorRepairsValueCheck.new(nil, nil, self),
-    ].compact
+    ].flatten.compact
+  end
+
+  def uprn_questions
+    if form.start_date.year >= 2023
+      [
+        Form::Lettings::Pages::UprnKnown.new(nil, nil, self),
+        Form::Lettings::Pages::Uprn.new(nil, nil, self),
+        Form::Lettings::Pages::UprnConfirmation.new(nil, nil, self),
+        Form::Lettings::Pages::Address.new(nil, nil, self),
+      ]
+    else
+      [
+        Form::Lettings::Pages::PropertyPostcode.new(nil, nil, self),
+      ]
+    end
   end
 
   def displayed_in_tasklist?(log)
diff --git a/app/models/form/sales/questions/address_line1.rb b/app/models/form/sales/questions/address_line1.rb
index e8ccb17c0..2dd3a734e 100644
--- a/app/models/form/sales/questions/address_line1.rb
+++ b/app/models/form/sales/questions/address_line1.rb
@@ -6,6 +6,7 @@ class Form::Sales::Questions::AddressLine1 < ::Form::Question
     @header = "Address line 1"
     @type = "text"
     @plain_label = true
+    @question_number = 15
   end
 
   def hidden_in_check_answers?(log, _current_user = nil)
diff --git a/app/models/form/sales/questions/uprn.rb b/app/models/form/sales/questions/uprn.rb
index 2c0b66dc8..7967a2035 100644
--- a/app/models/form/sales/questions/uprn.rb
+++ b/app/models/form/sales/questions/uprn.rb
@@ -7,6 +7,7 @@ class Form::Sales::Questions::Uprn < ::Form::Question
     @type = "text"
     @hint_text = "The Unique Property Reference Number (UPRN) is a unique number system created by Ordnance Survey and used by housing providers and sectors UK-wide. For example 10010457355."
     @width = 10
+    @question_number = 14
   end
 
   def unanswered_error_message
diff --git a/app/models/lettings_log.rb b/app/models/lettings_log.rb
index f8c817c56..f96c41c88 100644
--- a/app/models/lettings_log.rb
+++ b/app/models/lettings_log.rb
@@ -32,6 +32,7 @@ class LettingsLog < Log
   before_validation :reset_location_fields!, unless: :postcode_known?
   before_validation :reset_previous_location_fields!, unless: :previous_postcode_known?
   before_validation :set_derived_fields!
+  after_validation :process_uprn_change!, if: :should_process_uprn_change?
 
   belongs_to :scheme, optional: true
   belongs_to :location, optional: true
@@ -679,4 +680,8 @@ private
   def unknown_housingneeds?
     housingneeds == 3
   end
+
+  def should_process_uprn_change?
+    uprn_changed? && startdate && startdate.year >= 2023
+  end
 end
diff --git a/app/models/log.rb b/app/models/log.rb
index 34c920bd5..3ecc02754 100644
--- a/app/models/log.rb
+++ b/app/models/log.rb
@@ -45,6 +45,7 @@ class Log < ApplicationRecord
       self.address_line2 = presenter.address_line2
       self.town_or_city = presenter.town_or_city
       self.postcode_full = presenter.postcode
+      self.county = nil
       process_postcode_changes!
     end
   end
diff --git a/app/views/form/_check_answers_summary_list.html.erb b/app/views/form/_check_answers_summary_list.html.erb
index 71fe9cd97..653cd610d 100644
--- a/app/views/form/_check_answers_summary_list.html.erb
+++ b/app/views/form/_check_answers_summary_list.html.erb
@@ -9,7 +9,7 @@
             class: "govuk-!-margin-right-4",
           ) %>
         <% extra_value = question.get_extra_check_answer_value(@log) %>
-        <% if extra_value && question.answer_label(lettings_log, current_user).present? %>
+        <% if extra_value && question.answer_label(@log, current_user).present? %>
           <%= simple_format(
             extra_value,
             wrapper_tag: "span",
diff --git a/spec/models/form/lettings/pages/address_spec.rb b/spec/models/form/lettings/pages/address_spec.rb
new file mode 100644
index 000000000..e4cf044b8
--- /dev/null
+++ b/spec/models/form/lettings/pages/address_spec.rb
@@ -0,0 +1,73 @@
+require "rails_helper"
+
+RSpec.describe Form::Lettings::Pages::Address, type: :model do
+  subject(:page) { described_class.new(page_id, page_definition, subsection) }
+
+  let(:page_id) { nil }
+  let(:page_definition) { nil }
+  let(:subsection) { instance_double(Form::Subsection) }
+
+  it "has correct subsection" do
+    expect(page.subsection).to eq(subsection)
+  end
+
+  it "has correct questions" do
+    expect(page.questions.map(&:id)).to eq(%w[address_line1 address_line2 town_or_city county postcode_full])
+  end
+
+  it "has the correct id" do
+    expect(page.id).to eq("address")
+  end
+
+  it "has the correct header" do
+    expect(page.header).to eq("What is the property's address?")
+  end
+
+  it "has the correct description" do
+    expect(page.description).to be_nil
+  end
+
+  it "has correct depends_on" do
+    expect(page.depends_on).to be_nil
+  end
+
+  describe "has correct routed_to?" do
+    context "when uprn_known == nil" do
+      let(:log) { create(:lettings_log, uprn_known: nil) }
+
+      it "returns false" do
+        expect(page.routed_to?(log)).to eq(false)
+      end
+    end
+
+    context "when uprn_confirmed != 1" do
+      let(:log) do
+        create(:lettings_log, uprn_known: 1, uprn_confirmed: 0)
+      end
+
+      it "returns true" do
+        expect(page.routed_to?(log)).to eq(true)
+      end
+    end
+
+    context "when uprn_known == 0" do
+      let(:log) do
+        create(:lettings_log, uprn_known: 0, uprn_confirmed: 0)
+      end
+
+      it "returns true" do
+        expect(page.routed_to?(log)).to eq(true)
+      end
+    end
+
+    context "when uprn_confirmed == 1 && uprn_known != 0" do
+      let(:log) do
+        create(:lettings_log, uprn_known: 1, uprn_confirmed: 1)
+      end
+
+      it "returns true" do
+        expect(page.routed_to?(log)).to eq(false)
+      end
+    end
+  end
+end
diff --git a/spec/models/form/lettings/pages/property_local_authority_spec.rb b/spec/models/form/lettings/pages/property_local_authority_spec.rb
new file mode 100644
index 000000000..5b5ee95eb
--- /dev/null
+++ b/spec/models/form/lettings/pages/property_local_authority_spec.rb
@@ -0,0 +1,77 @@
+require "rails_helper"
+
+RSpec.describe Form::Lettings::Pages::PropertyLocalAuthority, type: :model do
+  subject(:page) { described_class.new(page_id, page_definition, subsection) }
+
+  let(:page_id) { nil }
+  let(:page_definition) { nil }
+  let(:subsection) { instance_double(Form::Subsection, form: instance_double(Form, start_date:)) }
+  let(:start_date) { Time.utc(2022, 4, 1) }
+
+  it "has correct subsection" do
+    expect(page.subsection).to eq(subsection)
+  end
+
+  it "has correct questions" do
+    expect(page.questions.map(&:id)).to eq(
+      %w[
+        la
+      ],
+    )
+  end
+
+  it "has the correct id" do
+    expect(page.id).to eq("property_local_authority")
+  end
+
+  it "has the correct header" do
+    expect(page.header).to be_nil
+  end
+
+  it "has the correct description" do
+    expect(page.description).to be_nil
+  end
+
+  it "has the correct depends_on" do
+    expect(page.depends_on).to match([{ "is_general_needs?" => true, "is_la_inferred" => false }])
+  end
+
+  describe "has correct routed_to?" do
+    context "when start_date < 2023" do
+      let(:log) { create(:lettings_log, uprn_known: 1) }
+      let(:start_date) { Time.utc(2022, 2, 8) }
+
+      it "returns false" do
+        expect(page.routed_to?(log)).to eq(true)
+      end
+    end
+
+    context "when start_date >= 2023" do
+      let(:log) { create(:lettings_log, uprn_known: 1) }
+      let(:start_date) { Time.utc(2023, 2, 8) }
+
+      it "returns true" do
+        expect(page.routed_to?(log)).to eq(true)
+      end
+    end
+
+    context "when start_date < 2023 and uprn_known: nil" do
+      let(:log) { create(:lettings_log, uprn_known: nil) }
+      let(:start_date) { Time.utc(2023, 2, 8) }
+
+      it "returns true" do
+        expect(page.routed_to?(log)).to eq(false)
+      end
+
+      context "when is_la_inferred: true" do
+        before do
+          allow(log).to receive(:is_la_inferred?).and_return(true)
+        end
+
+        it "returns true" do
+          expect(page.routed_to?(log)).to eq(false)
+        end
+      end
+    end
+  end
+end
diff --git a/spec/models/form/lettings/pages/uprn_confirmation_spec.rb b/spec/models/form/lettings/pages/uprn_confirmation_spec.rb
new file mode 100644
index 000000000..e1c6a587d
--- /dev/null
+++ b/spec/models/form/lettings/pages/uprn_confirmation_spec.rb
@@ -0,0 +1,59 @@
+require "rails_helper"
+
+RSpec.describe Form::Lettings::Pages::UprnConfirmation, type: :model do
+  subject(:page) { described_class.new(page_id, page_definition, subsection) }
+
+  let(:page_id) { nil }
+  let(:page_definition) { nil }
+  let(:subsection) { instance_double(Form::Subsection) }
+
+  it "has correct subsection" do
+    expect(page.subsection).to eq(subsection)
+  end
+
+  it "has correct questions" do
+    expect(page.questions.map(&:id)).to eq(%w[uprn_confirmed])
+  end
+
+  it "has the correct id" do
+    expect(page.id).to eq("uprn_confirmation")
+  end
+
+  it "has the correct header" do
+    expect(page.header).to eq("We found an address that might be this property")
+  end
+
+  it "has the correct description" do
+    expect(page.description).to be_nil
+  end
+
+  it "has correct depends_on" do
+    expect(page.depends_on).to be_nil
+  end
+
+  describe "has correct routed_to?" do
+    context "when uprn present && uprn_known == 1 " do
+      let(:log) { create(:lettings_log, uprn_known: 1, uprn: "123456789") }
+
+      it "returns true" do
+        expect(page.routed_to?(log)).to eq(true)
+      end
+    end
+
+    context "when uprn = nil" do
+      let(:log) { create(:lettings_log, uprn_known: 1, uprn: nil) }
+
+      it "returns false" do
+        expect(page.routed_to?(log)).to eq(false)
+      end
+    end
+
+    context "when uprn_known == 0" do
+      let(:log) { create(:lettings_log, uprn_known: 0, uprn: "123456789") }
+
+      it "returns false" do
+        expect(page.routed_to?(log)).to eq(false)
+      end
+    end
+  end
+end
diff --git a/spec/models/form/lettings/pages/uprn_known_spec.rb b/spec/models/form/lettings/pages/uprn_known_spec.rb
new file mode 100644
index 000000000..27b893a5c
--- /dev/null
+++ b/spec/models/form/lettings/pages/uprn_known_spec.rb
@@ -0,0 +1,51 @@
+require "rails_helper"
+
+RSpec.describe Form::Lettings::Pages::UprnKnown, type: :model do
+  subject(:page) { described_class.new(page_id, page_definition, subsection) }
+
+  let(:page_id) { nil }
+  let(:page_definition) { nil }
+  let(:subsection) { instance_double(Form::Subsection) }
+
+  it "has correct subsection" do
+    expect(page.subsection).to eq(subsection)
+  end
+
+  it "has correct questions" do
+    expect(page.questions.map(&:id)).to eq(%w[uprn_known])
+  end
+
+  it "has the correct id" do
+    expect(page.id).to eq("uprn_known")
+  end
+
+  it "has the correct header" do
+    expect(page.header).to be_nil
+  end
+
+  it "has the correct description" do
+    expect(page.description).to be_nil
+  end
+
+  it "has correct depends_on" do
+    expect(page.depends_on).to be_nil
+  end
+
+  describe "has correct routed_to?" do
+    context "when needstype != 2" do
+      let(:log) { create(:lettings_log, needstype: nil) }
+
+      it "returns true" do
+        expect(page.routed_to?(log)).to eq(true)
+      end
+    end
+
+    context "when needstype == 2" do
+      let(:log) { create(:lettings_log, needstype: 2) }
+
+      it "returns true" do
+        expect(page.routed_to?(log)).to eq(false)
+      end
+    end
+  end
+end
diff --git a/spec/models/form/lettings/pages/uprn_spec.rb b/spec/models/form/lettings/pages/uprn_spec.rb
new file mode 100644
index 000000000..7b480b6b2
--- /dev/null
+++ b/spec/models/form/lettings/pages/uprn_spec.rb
@@ -0,0 +1,81 @@
+require "rails_helper"
+
+RSpec.describe Form::Lettings::Pages::Uprn, type: :model do
+  subject(:page) { described_class.new(page_id, page_definition, subsection) }
+
+  let(:page_id) { nil }
+  let(:page_definition) { nil }
+  let(:subsection) { instance_double(Form::Subsection) }
+
+  it "has correct subsection" do
+    expect(page.subsection).to eq(subsection)
+  end
+
+  it "has correct questions" do
+    expect(page.questions.map(&:id)).to eq(%w[uprn])
+  end
+
+  it "has the correct id" do
+    expect(page.id).to eq("uprn")
+  end
+
+  it "has the correct header" do
+    expect(page.header).to be_nil
+  end
+
+  it "has the correct description" do
+    expect(page.description).to be_nil
+  end
+
+  it "has correct depends_on" do
+    expect(page.depends_on).to be_nil
+  end
+
+  it "has correct skip_text" do
+    expect(page.skip_text).to eq("Enter address instead")
+  end
+
+  describe "has correct routed_to?" do
+    context "when uprn_known != 1" do
+      let(:log) { create(:lettings_log, uprn_known: 0) }
+
+      it "returns false" do
+        expect(page.routed_to?(log)).to eq(false)
+      end
+    end
+
+    context "when uprn_known == 1" do
+      let(:log) { create(:lettings_log, uprn_known: 1) }
+
+      it "returns true" do
+        expect(page.routed_to?(log)).to eq(true)
+      end
+    end
+
+    context "when needstype == 2" do
+      let(:log) { create(:lettings_log, uprn_known: 1, needstype: 2) }
+
+      it "returns true" do
+        expect(page.routed_to?(log)).to eq(false)
+      end
+    end
+  end
+
+  describe "has correct skip_href" do
+    context "when log is nil" do
+      it "is nil" do
+        expect(page.skip_href).to be_nil
+      end
+    end
+
+    context "when log is present" do
+      let(:log) { create(:lettings_log) }
+
+      it "points to address page" do
+        expect(page.skip_href(log)).to eq(
+          "/lettings-logs/#{log.id}/address",
+        )
+      end
+    end
+  end
+end
diff --git a/spec/models/form/lettings/questions/address_line1_spec.rb b/spec/models/form/lettings/questions/address_line1_spec.rb
new file mode 100644
index 000000000..781b0a748
--- /dev/null
+++ b/spec/models/form/lettings/questions/address_line1_spec.rb
@@ -0,0 +1,79 @@
+require "rails_helper"
+
+RSpec.describe Form::Lettings::Questions::AddressLine1, type: :model do
+  subject(:question) { described_class.new(question_id, question_definition, page) }
+
+  let(:question_id) { nil }
+  let(:question_definition) { nil }
+  let(:page) { instance_double(Form::Page) }
+
+  it "has correct page" do
+    expect(question.page).to eq(page)
+  end
+
+  it "has the correct id" do
+    expect(question.id).to eq("address_line1")
+  end
+
+  it "has the correct header" do
+    expect(question.header).to eq("Address line 1")
+  end
+
+  it "has the correct question_number" do
+    expect(question.question_number).to eq(12)
+  end
+
+  it "has the correct check_answer_label" do
+    expect(question.check_answer_label).to eq("Address")
+  end
+
+  it "has the correct type" do
+    expect(question.type).to eq("text")
+  end
+
+  it "is not marked as derived" do
+    expect(question.derived?).to be false
+  end
+
+  it "has the correct hint" do
+    expect(question.hint_text).to be_nil
+  end
+
+  it "has the correct inferred check answers value" do
+    expect(question.inferred_check_answers_value).to be_nil
+  end
+
+  it "has the correct check_answers_card_number" do
+    expect(question.check_answers_card_number).to be_nil
+  end
+
+  describe "has the correct get_extra_check_answer_value" do
+    context "when la is not present" do
+      let(:log) { create(:lettings_log, la: nil) }
+
+      it "returns nil" do
+        expect(question.get_extra_check_answer_value(log)).to be_nil
+      end
+    end
+
+    context "when la is present but not inferred" do
+      let(:log) { create(:lettings_log, la: "E09000003", is_la_inferred: false) }
+
+      it "returns nil" do
+        expect(question.get_extra_check_answer_value(log)).to be_nil
+      end
+    end
+
+    context "when la is present but inferred" do
+      let(:log) { create(:lettings_log, la: "E09000003") }
+
+      before do
+        allow(log).to receive(:is_la_inferred?).and_return(true)
+      end
+
+      it "returns the la" do
+        expect(question.get_extra_check_answer_value(log)).to eq("Barnet")
+      end
+    end
+  end
+end
diff --git a/spec/models/form/lettings/questions/address_line2_spec.rb b/spec/models/form/lettings/questions/address_line2_spec.rb
new file mode 100644
index 000000000..4ac51a231
--- /dev/null
+++ b/spec/models/form/lettings/questions/address_line2_spec.rb
@@ -0,0 +1,49 @@
+require "rails_helper"
+
+RSpec.describe Form::Lettings::Questions::AddressLine2, type: :model do
+  subject(:question) { described_class.new(question_id, question_definition, page) }
+
+  let(:question_id) { nil }
+  let(:question_definition) { nil }
+  let(:page) { instance_double(Form::Page) }
+
+  it "has correct page" do
+    expect(question.page).to eq(page)
+  end
+
+  it "has the correct id" do
+    expect(question.id).to eq("address_line2")
+  end
+
+  it "has the correct header" do
+    expect(question.header).to eq("Address line 2 (optional)")
+  end
+
+  it "has the correct check_answer_label" do
+    expect(question.check_answer_label).to be_nil
+  end
+
+  it "has the correct type" do
+    expect(question.type).to eq("text")
+  end
+
+  it "is not marked as derived" do
+    expect(question.derived?).to be false
+  end
+
+  it "has the correct hint" do
+    expect(question.hint_text).to be_nil
+  end
+
+  it "has the correct inferred check answers value" do
+    expect(question.inferred_check_answers_value).to be_nil
+  end
+
+  it "has the correct check_answers_card_number" do
+    expect(question.check_answers_card_number).to be_nil
+  end
+
+  it "has the correct hidden_in_check_answers" do
+    expect(question.hidden_in_check_answers?).to eq(true)
+  end
+end
diff --git a/spec/models/form/lettings/questions/county_spec.rb b/spec/models/form/lettings/questions/county_spec.rb
new file mode 100644
index 000000000..cf8f814e4
--- /dev/null
+++ b/spec/models/form/lettings/questions/county_spec.rb
@@ -0,0 +1,49 @@
+require "rails_helper"
+
+RSpec.describe Form::Lettings::Questions::County, type: :model do
+  subject(:question) { described_class.new(question_id, question_definition, page) }
+
+  let(:question_id) { nil }
+  let(:question_definition) { nil }
+  let(:page) { instance_double(Form::Page) }
+
+  it "has correct page" do
+    expect(question.page).to eq(page)
+  end
+
+  it "has the correct id" do
+    expect(question.id).to eq("county")
+  end
+
+  it "has the correct header" do
+    expect(question.header).to eq("County (optional)")
+  end
+
+  it "has the correct check_answer_label" do
+    expect(question.check_answer_label).to be_nil
+  end
+
+  it "has the correct type" do
+    expect(question.type).to eq("text")
+  end
+
+  it "is not marked as derived" do
+    expect(question.derived?).to be false
+  end
+
+  it "has the correct hint" do
+    expect(question.hint_text).to be_nil
+  end
+
+  it "has the correct inferred check answers value" do
+    expect(question.inferred_check_answers_value).to be_nil
+  end
+
+  it "has the correct check_answers_card_number" do
+    expect(question.check_answers_card_number).to be_nil
+  end
+
+  it "has the correct hidden_in_check_answers" do
+    expect(question.hidden_in_check_answers?).to eq(true)
+  end
+end
diff --git a/spec/models/form/lettings/questions/la_spec.rb b/spec/models/form/lettings/questions/la_spec.rb
index f73a29660..3b5e30977 100644
--- a/spec/models/form/lettings/questions/la_spec.rb
+++ b/spec/models/form/lettings/questions/la_spec.rb
@@ -315,4 +315,34 @@ RSpec.describe Form::Lettings::Questions::La, type: :model do
       "E06000065" => "North Yorkshire",
     })
   end
+
+  describe "has the correct hidden_in_check_answers" do
+    context "when saledate.year before 2023" do
+      let(:log) { build(:lettings_log, startdate: Time.zone.parse("2022-07-01")) }
+
+      it "returns false" do
+        expect(question.hidden_in_check_answers?(log)).to eq(false)
+      end
+    end
+
+    context "when saledate.year >= 2023" do
+      let(:log) { build(:lettings_log, startdate: Time.zone.parse("2023-07-01")) }
+
+      it "returns true" do
+        expect(question.hidden_in_check_answers?(log)).to eq(false)
+      end
+    end
+
+    context "when saledate.year >= 2023 and la inferred" do
+      let(:log) { build(:lettings_log, startdate: Time.zone.parse("2023-07-01")) }
+
+      before do
+        allow(log).to receive(:is_la_inferred?).and_return(true)
+      end
+
+      it "returns true" do
+        expect(question.hidden_in_check_answers?(log)).to eq(true)
+      end
+    end
+  end
 end
diff --git a/spec/models/form/lettings/questions/postcode_for_full_address_spec.rb b/spec/models/form/lettings/questions/postcode_for_full_address_spec.rb
new file mode 100644
index 000000000..ccb02ef07
--- /dev/null
+++ b/spec/models/form/lettings/questions/postcode_for_full_address_spec.rb
@@ -0,0 +1,62 @@
+require "rails_helper"
+
+RSpec.describe Form::Lettings::Questions::PostcodeForFullAddress, type: :model do
+  subject(:question) { described_class.new(question_id, question_definition, page) }
+
+  let(:question_id) { nil }
+  let(:question_definition) { nil }
+  let(:page) { instance_double(Form::Page) }
+
+  it "has correct page" do
+    expect(question.page).to eq(page)
+  end
+
+  it "has the correct id" do
+    expect(question.id).to eq("postcode_full")
+  end
+
+  it "has the correct header" do
+    expect(question.header).to eq("Postcode")
+  end
+
+  it "has the correct check_answer_label" do
+    expect(question.check_answer_label).to be_nil
+  end
+
+  it "has the correct type" do
+    expect(question.type).to eq("text")
+  end
+
+  it "is not marked as derived" do
+    expect(question.derived?).to be false
+  end
+
+  it "has the correct hint" do
+    expect(question.hint_text).to be_nil
+  end
+
+  it "has the correct width" do
+    expect(question.width).to eq(5)
+  end
+
+  it "has the correct inferred_answers" do
+    expect(question.inferred_answers).to eq({
+      "la" => {
+        "is_la_inferred" => true,
+      },
+    })
+  end
+
+  it "has the correct inferred_check_answers_value" do
+    expect(question.inferred_check_answers_value).to eq([{
+      "condition" => {
+        "pcodenk" => 1,
+      },
+      "value" => "Not known",
+    }])
+  end
+
+  it "has the correct hidden_in_check_answers" do
+    expect(question.hidden_in_check_answers?).to eq(true)
+  end
+end
diff --git a/spec/models/form/lettings/questions/town_or_city_spec.rb b/spec/models/form/lettings/questions/town_or_city_spec.rb
new file mode 100644
index 000000000..8741fb058
--- /dev/null
+++ b/spec/models/form/lettings/questions/town_or_city_spec.rb
@@ -0,0 +1,49 @@
+require "rails_helper"
+
+RSpec.describe Form::Lettings::Questions::TownOrCity, type: :model do
+  subject(:question) { described_class.new(question_id, question_definition, page) }
+
+  let(:question_id) { nil }
+  let(:question_definition) { nil }
+  let(:page) { instance_double(Form::Page) }
+
+  it "has correct page" do
+    expect(question.page).to eq(page)
+  end
+
+  it "has the correct id" do
+    expect(question.id).to eq("town_or_city")
+  end
+
+  it "has the correct header" do
+    expect(question.header).to eq("Town or city")
+  end
+
+  it "has the correct check_answer_label" do
+    expect(question.check_answer_label).to be_nil
+  end
+
+  it "has the correct type" do
+    expect(question.type).to eq("text")
+  end
+
+  it "is not marked as derived" do
+    expect(question.derived?).to be false
+  end
+
+  it "has the correct hint" do
+    expect(question.hint_text).to be_nil
+  end
+
+  it "has the correct inferred check answers value" do
+    expect(question.inferred_check_answers_value).to be_nil
+  end
+
+  it "has the correct check_answers_card_number" do
+    expect(question.check_answers_card_number).to be_nil
+  end
+
+  it "has the correct hidden_in_check_answers" do
+    expect(question.hidden_in_check_answers?).to eq(true)
+  end
+end
diff --git a/spec/models/form/lettings/questions/uprn_confirmation_spec.rb b/spec/models/form/lettings/questions/uprn_confirmation_spec.rb
new file mode 100644
index 000000000..3c409641d
--- /dev/null
+++ b/spec/models/form/lettings/questions/uprn_confirmation_spec.rb
@@ -0,0 +1,90 @@
+require "rails_helper"
+
+RSpec.describe Form::Lettings::Questions::UprnConfirmation, type: :model do
+  subject(:question) { described_class.new(question_id, question_definition, page) }
+
+  let(:question_id) { nil }
+  let(:question_definition) { nil }
+  let(:page) { instance_double(Form::Page) }
+
+  it "has correct page" do
+    expect(question.page).to eq(page)
+  end
+
+  it "has the correct id" do
+    expect(question.id).to eq("uprn_confirmed")
+  end
+
+  it "has the correct header" do
+    expect(question.header).to eq("Is this the property address?")
+  end
+
+  it "has the correct check_answer_label" do
+    expect(question.check_answer_label).to eq("Is this the right address?")
+  end
+
+  it "has the correct type" do
+    expect(question.type).to eq("radio")
+  end
+
+  it "is not marked as derived" do
+    expect(question.derived?).to be false
+  end
+
+  it "has the correct hint" do
+    expect(question.hint_text).to be_nil
+  end
+
+  it "has the correct unanswered_error_message" do
+    expect(question.unanswered_error_message).to eq("You must answer is this the right address?")
+  end
+
+  describe "notification_banner" do
+    context "when address is not present" do
+      it "returns nil" do
+        log = create(:lettings_log)
+
+        expect(question.notification_banner(log)).to be_nil
+      end
+    end
+
+    context "when address is present" do
+      it "returns formatted value" do
+        log = create(:lettings_log, address_line1: "1, Test Street", town_or_city: "Test Town", county: "Test County", postcode_full: "AA1 1AA", uprn: "1234")
+
+        expect(question.notification_banner(log)).to eq(
+          {
+            heading: "1, Test Street\nAA1 1AA\nTest Town\nTest County",
+            title: "UPRN: 1234",
+          },
+        )
+      end
+    end
+  end
+
+  describe "has the correct hidden_in_check_answers" do
+    context "when uprn_known != 1 && uprn_confirmed == nil" do
+      let(:log) { create(:lettings_log, uprn_known: 0, uprn_confirmed: nil) }
+
+      it "returns true" do
+        expect(question.hidden_in_check_answers?(log)).to eq(true)
+      end
+    end
+
+    context "when uprn_known == 1 && uprn_confirmed == nil" do
+      let(:log) { create(:lettings_log, uprn_known: 1, uprn_confirmed: nil) }
+
+      it "returns false" do
+        expect(question.hidden_in_check_answers?(log)).to eq(false)
+      end
+    end
+
+    context "when uprn_known != 1 && uprn_confirmed == 1" do
+      let(:log) { create(:lettings_log, uprn_known: 1, uprn_confirmed: 1) }
+
+      it "returns true" do
+        expect(question.hidden_in_check_answers?(log)).to eq(true)
+      end
+    end
+  end
+end
diff --git a/spec/models/form/lettings/questions/uprn_known_spec.rb b/spec/models/form/lettings/questions/uprn_known_spec.rb
new file mode 100644
index 000000000..1a0f810da
--- /dev/null
+++ b/spec/models/form/lettings/questions/uprn_known_spec.rb
@@ -0,0 +1,59 @@
+require "rails_helper"
+
+RSpec.describe Form::Lettings::Questions::UprnKnown, type: :model do
+  subject(:question) { described_class.new(question_id, question_definition, page) }
+
+  let(:question_id) { nil }
+  let(:question_definition) { nil }
+  let(:page) { instance_double(Form::Page) }
+
+  it "has correct page" do
+    expect(question.page).to eq(page)
+  end
+
+  it "has the correct id" do
+    expect(question.id).to eq("uprn_known")
+  end
+
+  it "has the correct header" do
+    expect(question.header).to eq("Do you know the property UPRN?")
+  end
+
+  it "has the correct check_answer_label" do
+    expect(question.check_answer_label).to eq("UPRN known?")
+  end
+
+  it "has the correct type" do
+    expect(question.type).to eq("radio")
+  end
+
+  it "is not marked as derived" do
+    expect(question.derived?).to be false
+  end
+
+  it "has the correct answer_options" do
+    expect(question.answer_options).to eq({
+      "0" => { "value" => "No" },
+      "1" => { "value" => "Yes" },
+    })
+  end
+
+  it "has correct conditional for" do
+    expect(question.conditional_for).to be_nil
+  end
+
+  it "has the correct unanswered_error_message" do
+    expect(question.unanswered_error_message).to eq("You must answer UPRN known?")
+  end
+
+  it "has the correct hint" do
+    expect(question.hint_text).to eq(
+      "The Unique Property Reference Number (UPRN) is a unique number system created by Ordnance Survey and used by housing providers and sectors UK-wide. For example 10010457355.<br><br>
+    You can continue without the UPRN, but it means we will need you to enter the address of the property.",
+    )
+  end
+
+  it "has the correct hidden_in_check_answers" do
+    expect(question.hidden_in_check_answers).to be_nil
+  end
+end
diff --git a/spec/models/form/lettings/questions/uprn_spec.rb b/spec/models/form/lettings/questions/uprn_spec.rb
new file mode 100644
index 000000000..8f6ba047a
--- /dev/null
+++ b/spec/models/form/lettings/questions/uprn_spec.rb
@@ -0,0 +1,92 @@
+require "rails_helper"
+
+RSpec.describe Form::Lettings::Questions::Uprn, type: :model do
+  subject(:question) { described_class.new(question_id, question_definition, page) }
+
+  let(:question_id) { nil }
+  let(:question_definition) { nil }
+  let(:page) { instance_double(Form::Page) }
+
+  it "has correct page" do
+    expect(question.page).to eq(page)
+  end
+
+  it "has the correct id" do
+    expect(question.id).to eq("uprn")
+  end
+
+  it "has the correct header" do
+    expect(question.header).to eq("What is the property's UPRN")
+  end
+
+  it "has the correct check_answer_label" do
+    expect(question.check_answer_label).to eq("UPRN")
+  end
+
+  it "has the correct type" do
+    expect(question.type).to eq("text")
+  end
+
+  it "is not marked as derived" do
+    expect(question.derived?).to be false
+  end
+
+  it "has the correct question_number" do
+    expect(question.question_number).to eq(11)
+  end
+
+  it "has the correct hint" do
+    expect(question.hint_text).to eq("The Unique Property Reference Number (UPRN) is a unique number system created by Ordnance Survey and used by housing providers and sectors UK-wide. For example 10010457355.")
+  end
+
+  it "has the correct unanswered_error_message" do
+    expect(question.unanswered_error_message).to eq("UPRN must be 12 digits or less")
+  end
+
+  describe "get_extra_check_answer_value" do
+    context "when address is not present" do
+      let(:log) { create(:lettings_log) }
+
+      it "returns nil" do
+        expect(question.get_extra_check_answer_value(log)).to be_nil
+      end
+    end
+
+    context "when address is present" do
+      let(:log) do
+        create(
+          :lettings_log,
+          address_line1: "1, Test Street",
+          town_or_city: "Test Town",
+          county: "Test County",
+          postcode_full: "AA1 1AA",
+          la: "E09000003",
+        )
+      end
+
+      it "returns formatted value" do
+        expect(question.get_extra_check_answer_value(log)).to eq(
+          "\n\n1, Test Street\nTest Town\nTest County\nAA1 1AA\nWestminster",
+        )
+      end
+    end
+  end
+
+  describe "has the correct hidden_in_check_answers" do
+    context "when uprn_known == 1" do
+      let(:log) { create(:lettings_log, uprn_known: 1) }
+
+      it "returns false" do
+        expect(question.hidden_in_check_answers?(log)).to eq(false)
+      end
+    end
+
+    context "when uprn_known != 1" do
+      let(:log) { create(:lettings_log, uprn_known: 0) }
+
+      it "returns false" do
+        expect(question.hidden_in_check_answers?(log)).to eq(true)
+      end
+    end
+  end
+end
diff --git a/spec/models/form/lettings/subsections/property_information_spec.rb b/spec/models/form/lettings/subsections/property_information_spec.rb
index 8b30964c3..2e7e58deb 100644
--- a/spec/models/form/lettings/subsections/property_information_spec.rb
+++ b/spec/models/form/lettings/subsections/property_information_spec.rb
@@ -9,28 +9,67 @@ RSpec.describe Form::Lettings::Subsections::PropertyInformation, type: :model do
     expect(property_information.section).to eq(section)
   end
 
-  it "has correct pages" do
-    expect(property_information.pages.map(&:id)).to eq(
-      %w[
-        property_postcode
-        property_local_authority
-        first_time_property_let_as_social_housing
-        property_let_type
-        property_vacancy_reason_not_first_let
-        property_vacancy_reason_first_let
-        property_number_of_times_relet_not_social_let
-        property_number_of_times_relet_social_let
-        property_unit_type
-        property_building_type
-        property_wheelchair_accessible
-        property_number_of_bedrooms
-        void_or_renewal_date
-        void_date_value_check
-        new_build_handover_date
-        property_major_repairs
-        property_major_repairs_value_check
-      ],
-    )
+  describe "pages" do
+    let(:section) { instance_double(Form::Sales::Sections::Household, form: instance_double(Form, start_date:)) }
+
+    context "when 2022" do
+      let(:start_date) { Time.utc(2022, 2, 8) }
+
+      it "has correct pages" do
+        expect(property_information.pages.compact.map(&:id)).to eq(
+          %w[
+            property_postcode
+            property_local_authority
+            first_time_property_let_as_social_housing
+            property_let_type
+            property_vacancy_reason_not_first_let
+            property_vacancy_reason_first_let
+            property_number_of_times_relet_not_social_let
+            property_number_of_times_relet_social_let
+            property_unit_type
+            property_building_type
+            property_wheelchair_accessible
+            property_number_of_bedrooms
+            void_or_renewal_date
+            void_date_value_check
+            new_build_handover_date
+            property_major_repairs
+            property_major_repairs_value_check
+          ],
+        )
+      end
+    end
+
+    context "when 2023" do
+      let(:start_date) { Time.utc(2023, 2, 8) }
+
+      it "has correct pages" do
+        expect(property_information.pages.map(&:id)).to eq(
+          %w[
+            uprn_known
+            uprn
+            uprn_confirmation
+            address
+            property_local_authority
+            first_time_property_let_as_social_housing
+            property_let_type
+            property_vacancy_reason_not_first_let
+            property_vacancy_reason_first_let
+            property_number_of_times_relet_not_social_let
+            property_number_of_times_relet_social_let
+            property_unit_type
+            property_building_type
+            property_wheelchair_accessible
+            property_number_of_bedrooms
+            void_or_renewal_date
+            void_date_value_check
+            new_build_handover_date
+            property_major_repairs
+            property_major_repairs_value_check
+          ],
+        )
+      end
+    end
   end
 
   it "has the correct id" do
diff --git a/spec/models/form/sales/questions/address_line1_spec.rb b/spec/models/form/sales/questions/address_line1_spec.rb
index bc65c0646..27c0179e2 100644
--- a/spec/models/form/sales/questions/address_line1_spec.rb
+++ b/spec/models/form/sales/questions/address_line1_spec.rb
@@ -11,6 +11,10 @@ RSpec.describe Form::Sales::Questions::AddressLine1, type: :model do
     expect(question.page).to eq(page)
   end
 
+  it "has the correct question_number" do
+    expect(question.question_number).to eq(15)
+  end
+
   it "has the correct id" do
     expect(question.id).to eq("address_line1")
   end
diff --git a/spec/models/form/sales/questions/uprn_spec.rb b/spec/models/form/sales/questions/uprn_spec.rb
index 2f42c1cdd..50e575445 100644
--- a/spec/models/form/sales/questions/uprn_spec.rb
+++ b/spec/models/form/sales/questions/uprn_spec.rb
@@ -31,6 +31,10 @@ RSpec.describe Form::Sales::Questions::Uprn, type: :model do
     expect(question.derived?).to be false
   end
 
+  it "has the correct question_number" do
+    expect(question.question_number).to eq(14)
+  end
+
   it "has the correct hint" do
     expect(question.hint_text).to eq("The Unique Property Reference Number (UPRN) is a unique number system created by Ordnance Survey and used by housing providers and sectors UK-wide. For example 10010457355.")
   end
diff --git a/spec/models/lettings_log_spec.rb b/spec/models/lettings_log_spec.rb
index 43cbc69ce..9a8666eea 100644
--- a/spec/models/lettings_log_spec.rb
+++ b/spec/models/lettings_log_spec.rb
@@ -1,6 +1,7 @@
 require "rails_helper"
 require "shared/shared_examples_for_derived_fields"
 
+# rubocop:disable RSpec/AnyInstance
 RSpec.describe LettingsLog do
   let(:different_managing_organisation) { create(:organisation) }
   let(:created_by_user) { create(:user) }
@@ -3010,4 +3011,60 @@ RSpec.describe LettingsLog do
       end
     end
   end
+
+  describe "#process_uprn_change!" do
+    context "when UPRN set to a value" do
+      let(:lettings_log) do
+        create(
+          :lettings_log,
+          uprn: "123456789",
+          uprn_confirmed: 1,
+          county: "county",
+        )
+      end
+
+      it "updates sales log fields" do
+        lettings_log.uprn = "1111111"
+
+        allow_any_instance_of(UprnClient).to receive(:call)
+        allow_any_instance_of(UprnClient).to receive(:result).and_return({
+          "UPRN" => "UPRN",
+          "UDPRN" => "UDPRN",
+          "ADDRESS" => "full address",
+          "SUB_BUILDING_NAME" => "0",
+          "BUILDING_NAME" => "building name",
+          "THOROUGHFARE_NAME" => "thoroughfare",
+          "POST_TOWN" => "posttown",
+          "POSTCODE" => "postcode",
+        })
+
+        expect { lettings_log.process_uprn_change! }.to change(lettings_log, :address_line1).from(nil).to("0, Building Name, Thoroughfare")
+        .and change(lettings_log, :town_or_city).from(nil).to("Posttown")
+        .and change(lettings_log, :postcode_full).from(nil).to("POSTCODE")
+        .and change(lettings_log, :uprn_confirmed).from(1).to(nil)
+        .and change(lettings_log, :county).from("county").to(nil)
+      end
+    end
+
+    context "when UPRN nil" do
+      let(:lettings_log) { create(:lettings_log, uprn: nil) }
+
+      it "does not update sales log" do
+        expect { lettings_log.process_uprn_change! }.not_to change(lettings_log, :attributes)
+      end
+    end
+
+    context "when service errors" do
+      let(:lettings_log) { create(:lettings_log, uprn: "123456789", uprn_confirmed: 1) }
+      let(:error_message) { "error" }
+
+      it "adds error to sales log" do
+        allow_any_instance_of(UprnClient).to receive(:call)
+        allow_any_instance_of(UprnClient).to receive(:error).and_return(error_message)
+
+        expect { lettings_log.process_uprn_change! }.to change { lettings_log.errors[:uprn] }.from([]).to([error_message])
+      end
+    end
+  end
 end
+# rubocop:enable RSpec/AnyInstance
diff --git a/spec/models/sales_log_spec.rb b/spec/models/sales_log_spec.rb
index 231dc68c4..4bc90da37 100644
--- a/spec/models/sales_log_spec.rb
+++ b/spec/models/sales_log_spec.rb
@@ -517,7 +517,14 @@ RSpec.describe SalesLog, type: :model do
 
   describe "#process_uprn_change!" do
     context "when UPRN set to a value" do
-      let(:sales_log) { create(:sales_log, uprn: "123456789", uprn_confirmed: 1) }
+      let(:sales_log) do
+        create(
+          :sales_log,
+          uprn: "123456789",
+          uprn_confirmed: 1,
+          county: "county",
+        )
+      end
 
       it "updates sales log fields" do
         sales_log.uprn = "1111111"
@@ -538,6 +545,7 @@ RSpec.describe SalesLog, type: :model do
         .and change(sales_log, :town_or_city).from(nil).to("Posttown")
         .and change(sales_log, :postcode_full).from(nil).to("POSTCODE")
         .and change(sales_log, :uprn_confirmed).from(1).to(nil)
+        .and change(sales_log, :county).from("county").to(nil)
       end
     end