diff --git a/app/models/form/sales/pages/about_staircase.rb b/app/models/form/sales/pages/about_staircase.rb
index 2d1a17db4..4d5882916 100644
--- a/app/models/form/sales/pages/about_staircase.rb
+++ b/app/models/form/sales/pages/about_staircase.rb
@@ -1,17 +1,18 @@
 class Form::Sales::Pages::AboutStaircase < ::Form::Page
-  def initialize(id, hsh, subsection)
-    super
-    @id = "about_staircasing"
+  def initialize(id, hsh, subsection, joint_purchase:)
+    super(id, hsh, subsection)
+    @joint_purchase = joint_purchase
     @header = "About the staircasing transaction"
     @depends_on = [{
       "staircase" => 1,
+      "joint_purchase?" => joint_purchase,
     }]
   end
 
   def questions
     @questions ||= [
       Form::Sales::Questions::StaircaseBought.new(nil, nil, self),
-      Form::Sales::Questions::StaircaseOwned.new(nil, nil, self),
+      Form::Sales::Questions::StaircaseOwned.new(nil, nil, self, joint_purchase: @joint_purchase),
       staircase_sale_question,
     ].compact
   end
diff --git a/app/models/form/sales/pages/buyer_previous.rb b/app/models/form/sales/pages/buyer_previous.rb
index 361b3ba47..f37c6a847 100644
--- a/app/models/form/sales/pages/buyer_previous.rb
+++ b/app/models/form/sales/pages/buyer_previous.rb
@@ -1,12 +1,13 @@
 class Form::Sales::Pages::BuyerPrevious < ::Form::Page
-  def initialize(id, hsh, subsection)
-    super
-    @id = "buyer_previous"
+  def initialize(id, hsh, subsection, joint_purchase:)
+    super(id, hsh, subsection)
+    @joint_purchase = joint_purchase
+    @depends_on = [{ "joint_purchase?" => joint_purchase }]
   end
 
   def questions
     @questions ||= [
-      Form::Sales::Questions::BuyerPrevious.new(nil, nil, self),
+      Form::Sales::Questions::BuyerPrevious.new(nil, nil, self, joint_purchase: @joint_purchase),
     ]
   end
 end
diff --git a/app/models/form/sales/pages/previous_ownership.rb b/app/models/form/sales/pages/previous_ownership.rb
index 88b438e07..50711baf7 100644
--- a/app/models/form/sales/pages/previous_ownership.rb
+++ b/app/models/form/sales/pages/previous_ownership.rb
@@ -1,12 +1,13 @@
 class Form::Sales::Pages::PreviousOwnership < ::Form::Page
-  def initialize(id, hsh, subsection)
-    super
-    @id = "previous_ownership"
+  def initialize(id, hsh, subsection, joint_purchase:)
+    super(id, hsh, subsection)
+    @joint_purchase = joint_purchase
+    @depends_on = [{ "joint_purchase?" => @joint_purchase }]
   end
 
   def questions
     @questions ||= [
-      Form::Sales::Questions::Prevown.new(nil, nil, self),
+      Form::Sales::Questions::Prevown.new(nil, nil, self, joint_purchase: @joint_purchase),
     ]
   end
 end
diff --git a/app/models/form/sales/questions/buyer_previous.rb b/app/models/form/sales/questions/buyer_previous.rb
index 18ac019cb..15fe330f0 100644
--- a/app/models/form/sales/questions/buyer_previous.rb
+++ b/app/models/form/sales/questions/buyer_previous.rb
@@ -1,9 +1,9 @@
 class Form::Sales::Questions::BuyerPrevious < ::Form::Question
-  def initialize(id, hsh, page)
-    super
+  def initialize(id, hsh, page, joint_purchase:)
+    super(id, hsh, page)
     @id = "soctenant"
-    @check_answer_label = "Buyer was a registered provider, housing association or local authority tenant immediately before this sale?"
-    @header = "Was the buyer a private registered provider, housing association or local authority tenant immediately before this sale?"
+    @check_answer_label = I18n.t("check_answer_labels.soctenant", count: joint_purchase ? 2 : 1)
+    @header = I18n.t("questions.soctenant", count: joint_purchase ? 2 : 1)
     @type = "radio"
     @answer_options = ANSWER_OPTIONS
   end
diff --git a/app/models/form/sales/questions/prevown.rb b/app/models/form/sales/questions/prevown.rb
index a9a3b086b..571e1af8f 100644
--- a/app/models/form/sales/questions/prevown.rb
+++ b/app/models/form/sales/questions/prevown.rb
@@ -1,9 +1,9 @@
 class Form::Sales::Questions::Prevown < ::Form::Question
-  def initialize(id, hsh, page)
-    super
+  def initialize(id, hsh, page, joint_purchase:)
+    super(id, hsh, page)
     @id = "prevown"
-    @check_answer_label = "Buyers previously owned a property"
-    @header = "Has the buyer previously owned a property?"
+    @check_answer_label = I18n.t("check_answer_labels.prevown", count: joint_purchase ? 2 : 1)
+    @header = I18n.t("questions.prevown", count: joint_purchase ? 2 : 1)
     @type = "radio"
     @answer_options = ANSWER_OPTIONS
   end
diff --git a/app/models/form/sales/questions/staircase_owned.rb b/app/models/form/sales/questions/staircase_owned.rb
index 7e6dab5d6..a3596554e 100644
--- a/app/models/form/sales/questions/staircase_owned.rb
+++ b/app/models/form/sales/questions/staircase_owned.rb
@@ -1,9 +1,9 @@
 class Form::Sales::Questions::StaircaseOwned < ::Form::Question
-  def initialize(id, hsh, page)
-    super
+  def initialize(id, hsh, page, joint_purchase:)
+    super(id, hsh, page)
     @id = "stairowned"
-    @check_answer_label = "Percentage the buyer now owns in total"
-    @header = "What percentage of the property does the buyer now own in total?"
+    @check_answer_label = I18n.t("check_answer_labels.stairowned", count: joint_purchase ? 2 : 1)
+    @header = I18n.t("questions.stairowned", count: joint_purchase ? 2 : 1)
     @type = "numeric"
     @width = 5
     @min = 0
diff --git a/app/models/form/sales/subsections/income_benefits_and_savings.rb b/app/models/form/sales/subsections/income_benefits_and_savings.rb
index 9ff584d47..502b87fc9 100644
--- a/app/models/form/sales/subsections/income_benefits_and_savings.rb
+++ b/app/models/form/sales/subsections/income_benefits_and_savings.rb
@@ -23,7 +23,8 @@ class Form::Sales::Subsections::IncomeBenefitsAndSavings < ::Form::Subsection
       Form::Sales::Pages::Savings.new(nil, nil, self),
       Form::Sales::Pages::SavingsValueCheck.new("savings_value_check", nil, self),
       Form::Sales::Pages::DepositValueCheck.new("savings_deposit_value_check", nil, self),
-      Form::Sales::Pages::PreviousOwnership.new(nil, nil, self),
+      Form::Sales::Pages::PreviousOwnership.new("previous_ownership_joint_purchase", nil, self, joint_purchase: true),
+      Form::Sales::Pages::PreviousOwnership.new("previous_ownership_not_joint_purchase", nil, self, joint_purchase: false),
       previous_shared_page,
     ].compact
   end
diff --git a/app/models/form/sales/subsections/shared_ownership_scheme.rb b/app/models/form/sales/subsections/shared_ownership_scheme.rb
index 1f0cd6450..1c30f3b6f 100644
--- a/app/models/form/sales/subsections/shared_ownership_scheme.rb
+++ b/app/models/form/sales/subsections/shared_ownership_scheme.rb
@@ -10,14 +10,16 @@ class Form::Sales::Subsections::SharedOwnershipScheme < ::Form::Subsection
     @pages ||= [
       Form::Sales::Pages::LivingBeforePurchase.new("living_before_purchase_shared_ownership", nil, self),
       Form::Sales::Pages::Staircase.new(nil, nil, self),
-      Form::Sales::Pages::AboutStaircase.new(nil, nil, self),
+      Form::Sales::Pages::AboutStaircase.new("about_staircasing_joint_purchase", nil, self, joint_purchase: true),
+      Form::Sales::Pages::AboutStaircase.new("about_staircasing_not_joint_purchase", nil, self, joint_purchase: false),
       Form::Sales::Pages::StaircaseBoughtValueCheck.new(nil, nil, self),
       Form::Sales::Pages::Resale.new(nil, nil, self),
       Form::Sales::Pages::ExchangeDate.new(nil, nil, self),
       Form::Sales::Pages::HandoverDate.new(nil, nil, self),
       Form::Sales::Pages::HandoverDateCheck.new(nil, nil, self),
       Form::Sales::Pages::LaNominations.new(nil, nil, self),
-      Form::Sales::Pages::BuyerPrevious.new(nil, nil, self),
+      Form::Sales::Pages::BuyerPrevious.new("buyer_previous_joint_purchase", nil, self, joint_purchase: true),
+      Form::Sales::Pages::BuyerPrevious.new("buyer_previous_not_joint_purchase", nil, self, joint_purchase: false),
       Form::Sales::Pages::PreviousBedrooms.new(nil, nil, self),
       Form::Sales::Pages::PreviousPropertyType.new(nil, nil, self),
       Form::Sales::Pages::PreviousTenure.new(nil, nil, self),
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 8665c022a..c3762e259 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -538,6 +538,15 @@ en:
           W: "Suitable for someone who uses a wheelchair and offers the full use of all rooms and facilities."
           A: "Fitted with stairlifts, ramps, level access showers or grab rails."
           N: "Not designed to wheelchair-user standards or fitted with any equipment or adaptations."
+    soctenant:
+      one: "Was the buyer a private registered provider, housing association or local authority tenant immediately before this sale?"
+      other: "Were any of the buyers private registered providers, housing association or local authority tenants immediately before this sale?"
+    prevown:
+      one: "Has the buyer previously owned a property?"
+      other: "Have any of the buyers previously owned a property?"
+    stairowned:
+      one: "What percentage of the property does the buyer now own in total?"
+      other: "What percentage of the property do the buyers now own in total?"
 
   hints:
     location:
@@ -551,6 +560,17 @@ en:
     bulk_upload:
       needstype: "General needs housing includes both self-contained and shared housing without support or specific adaptations. Supported housing can include direct access hostels, group homes, residential care and nursing homes."
 
+  check_answer_labels:
+    soctenant:
+      one: "Buyer was a registered provider, housing association or local authority tenant immediately before this sale?"
+      other: "Any buyers were registered providers, housing association or local authority tenants immediately before this sale?"
+    prevown:
+      one: "Buyer previously owned a property"
+      other: "Buyers previously owned a property"
+    stairowned:
+      one: "Percentage the buyer now owns in total"
+      other: "Percentage the buyers now own in total"
+
   warnings:
     location:
       deactivate:
diff --git a/spec/models/form/sales/pages/about_staircase_spec.rb b/spec/models/form/sales/pages/about_staircase_spec.rb
index 3828f52e4..48aa82acf 100644
--- a/spec/models/form/sales/pages/about_staircase_spec.rb
+++ b/spec/models/form/sales/pages/about_staircase_spec.rb
@@ -1,11 +1,12 @@
 require "rails_helper"
 
 RSpec.describe Form::Sales::Pages::AboutStaircase, type: :model do
-  subject(:page) { described_class.new(page_id, page_definition, subsection) }
+  subject(:page) { described_class.new(page_id, page_definition, subsection, joint_purchase:) }
 
-  let(:page_id) { nil }
+  let(:page_id) { "an_id" }
   let(:page_definition) { nil }
   let(:subsection) { instance_double(Form::Subsection) }
+  let(:joint_purchase) { false }
 
   it "has correct subsection" do
     expect(page.subsection).to eq(subsection)
@@ -32,7 +33,7 @@ RSpec.describe Form::Sales::Pages::AboutStaircase, type: :model do
   end
 
   it "has the correct id" do
-    expect(page.id).to eq("about_staircasing")
+    expect(page.id).to eq("an_id")
   end
 
   it "has the correct header" do
@@ -43,9 +44,23 @@ RSpec.describe Form::Sales::Pages::AboutStaircase, type: :model do
     expect(page.description).to be_nil
   end
 
-  it "has correct depends_on" do
-    expect(page.depends_on).to eq([{
-      "staircase" => 1,
-    }])
+  context "when not a joint purchase" do
+    it "has correct depends_on" do
+      expect(page.depends_on).to eq([{
+        "staircase" => 1,
+        "joint_purchase?" => false,
+      }])
+    end
+  end
+
+  context "when a joint purchase" do
+    let(:joint_purchase) { true }
+
+    it "has correct depends_on" do
+      expect(page.depends_on).to eq([{
+        "staircase" => 1,
+        "joint_purchase?" => true,
+      }])
+    end
   end
 end
diff --git a/spec/models/form/sales/pages/buyer_previous_spec.rb b/spec/models/form/sales/pages/buyer_previous_spec.rb
index a3355c137..e6dda073e 100644
--- a/spec/models/form/sales/pages/buyer_previous_spec.rb
+++ b/spec/models/form/sales/pages/buyer_previous_spec.rb
@@ -1,11 +1,12 @@
 require "rails_helper"
 
 RSpec.describe Form::Sales::Pages::BuyerPrevious, type: :model do
-  subject(:page) { described_class.new(page_id, page_definition, subsection) }
+  subject(:page) { described_class.new(page_id, page_definition, subsection, joint_purchase:) }
 
-  let(:page_id) { nil }
+  let(:page_id) { "example" }
   let(:page_definition) { nil }
   let(:subsection) { instance_double(Form::Subsection) }
+  let(:joint_purchase) { false }
 
   it "has correct subsection" do
     expect(page.subsection).to eq(subsection)
@@ -16,7 +17,7 @@ RSpec.describe Form::Sales::Pages::BuyerPrevious, type: :model do
   end
 
   it "has the correct id" do
-    expect(page.id).to eq("buyer_previous")
+    expect(page.id).to eq("example")
   end
 
   it "has the correct header" do
@@ -26,4 +27,18 @@ RSpec.describe Form::Sales::Pages::BuyerPrevious, type: :model do
   it "has the correct description" do
     expect(page.description).to be_nil
   end
+
+  context "when sales is a joint purchase" do
+    let(:joint_purchase) { true }
+
+    it "has the correct depends on" do
+      expect(page.depends_on).to eq([{ "joint_purchase?" => true }])
+    end
+  end
+
+  context "when sales is not a joint purchase" do
+    it "has the correct depends on" do
+      expect(page.depends_on).to eq([{ "joint_purchase?" => false }])
+    end
+  end
 end
diff --git a/spec/models/form/sales/pages/previous_ownership_spec.rb b/spec/models/form/sales/pages/previous_ownership_spec.rb
index 7fe0d2795..69c93fefa 100644
--- a/spec/models/form/sales/pages/previous_ownership_spec.rb
+++ b/spec/models/form/sales/pages/previous_ownership_spec.rb
@@ -1,11 +1,12 @@
 require "rails_helper"
 
 RSpec.describe Form::Sales::Pages::PreviousOwnership, type: :model do
-  subject(:page) { described_class.new(page_id, page_definition, subsection) }
+  subject(:page) { described_class.new(page_id, page_definition, subsection, joint_purchase:) }
 
-  let(:page_id) { nil }
+  let(:page_id) { "example_id" }
   let(:page_definition) { nil }
   let(:subsection) { instance_double(Form::Subsection) }
+  let(:joint_purchase) { true }
 
   it "has correct subsection" do
     expect(page.subsection).to eq(subsection)
@@ -16,7 +17,7 @@ RSpec.describe Form::Sales::Pages::PreviousOwnership, type: :model do
   end
 
   it "has the correct id" do
-    expect(page.id).to eq("previous_ownership")
+    expect(page.id).to eq("example_id")
   end
 
   it "has the correct header" do
@@ -26,4 +27,16 @@ RSpec.describe Form::Sales::Pages::PreviousOwnership, type: :model do
   it "has the correct description" do
     expect(page.description).to be_nil
   end
+
+  it "when sale is a joint purchase has the correct depends on" do
+    expect(page.depends_on).to eq([{ "joint_purchase?" => true }])
+  end
+
+  context "when sale is not a joint purchase" do
+    let(:joint_purchase) { false }
+
+    it "has the correct depends on" do
+      expect(page.depends_on).to eq([{ "joint_purchase?" => false }])
+    end
+  end
 end
diff --git a/spec/models/form/sales/questions/buyer_previous_spec.rb b/spec/models/form/sales/questions/buyer_previous_spec.rb
index 07d3685f8..a1348f17b 100644
--- a/spec/models/form/sales/questions/buyer_previous_spec.rb
+++ b/spec/models/form/sales/questions/buyer_previous_spec.rb
@@ -1,11 +1,12 @@
 require "rails_helper"
 
 RSpec.describe Form::Sales::Questions::BuyerPrevious, type: :model do
-  subject(:question) { described_class.new(question_id, question_definition, page) }
+  subject(:question) { described_class.new(question_id, question_definition, page, joint_purchase:) }
 
   let(:question_id) { nil }
   let(:question_definition) { nil }
   let(:page) { instance_double(Form::Page) }
+  let(:joint_purchase) { true }
 
   it "has correct page" do
     expect(question.page).to eq(page)
@@ -15,12 +16,26 @@ RSpec.describe Form::Sales::Questions::BuyerPrevious, type: :model do
     expect(question.id).to eq("soctenant")
   end
 
-  it "has the correct header" do
-    expect(question.header).to eq("Was the buyer a private registered provider, housing association or local authority tenant immediately before this sale?")
+  context "when a joint purchase" do
+    it "has the correct header" do
+      expect(question.header).to eq("Were any of the buyers private registered providers, housing association or local authority tenants immediately before this sale?")
+    end
+
+    it "has the correct check_answer_label" do
+      expect(question.check_answer_label).to eq("Any buyers were registered providers, housing association or local authority tenants immediately before this sale?")
+    end
   end
 
-  it "has the correct check_answer_label" do
-    expect(question.check_answer_label).to eq("Buyer was a registered provider, housing association or local authority tenant immediately before this sale?")
+  context "when not a joint purchase" do
+    let(:joint_purchase) { false }
+
+    it "has the correct header" do
+      expect(question.header).to eq("Was the buyer a private registered provider, housing association or local authority tenant immediately before this sale?")
+    end
+
+    it "has the correct check_answer_label" do
+      expect(question.check_answer_label).to eq("Buyer was a registered provider, housing association or local authority tenant immediately before this sale?")
+    end
   end
 
   it "has the correct type" do
diff --git a/spec/models/form/sales/questions/prevown_spec.rb b/spec/models/form/sales/questions/prevown_spec.rb
index dda2b7c70..d7b101c99 100644
--- a/spec/models/form/sales/questions/prevown_spec.rb
+++ b/spec/models/form/sales/questions/prevown_spec.rb
@@ -1,11 +1,12 @@
 require "rails_helper"
 
 RSpec.describe Form::Sales::Questions::Prevown, type: :model do
-  subject(:question) { described_class.new(question_id, question_definition, page) }
+  subject(:question) { described_class.new(question_id, question_definition, page, joint_purchase:) }
 
   let(:question_id) { nil }
   let(:question_definition) { nil }
   let(:page) { instance_double(Form::Page) }
+  let(:joint_purchase) { false }
 
   it "has correct page" do
     expect(question.page).to eq(page)
@@ -15,12 +16,26 @@ RSpec.describe Form::Sales::Questions::Prevown, type: :model do
     expect(question.id).to eq("prevown")
   end
 
-  it "has the correct header" do
-    expect(question.header).to eq("Has the buyer previously owned a property?")
+  context "when sale is not a joint purchase" do
+    it "has the correct header" do
+      expect(question.header).to eq("Has the buyer previously owned a property?")
+    end
+
+    it "has the correct check_answer_label" do
+      expect(question.check_answer_label).to eq("Buyer previously owned a property")
+    end
   end
 
-  it "has the correct check_answer_label" do
-    expect(question.check_answer_label).to eq("Buyers previously owned a property")
+  context "when sale is a joint purchase" do
+    let(:joint_purchase) { true }
+
+    it "has the correct header" do
+      expect(question.header).to eq("Have any of the buyers previously owned a property?")
+    end
+
+    it "has the correct check_answer_label" do
+      expect(question.check_answer_label).to eq("Buyers previously owned a property")
+    end
   end
 
   it "has the correct type" do
diff --git a/spec/models/form/sales/questions/staircase_owned_spec.rb b/spec/models/form/sales/questions/staircase_owned_spec.rb
index cbd577784..8e78d540a 100644
--- a/spec/models/form/sales/questions/staircase_owned_spec.rb
+++ b/spec/models/form/sales/questions/staircase_owned_spec.rb
@@ -1,11 +1,12 @@
 require "rails_helper"
 
 RSpec.describe Form::Sales::Questions::StaircaseOwned, type: :model do
-  subject(:question) { described_class.new(question_id, question_definition, page) }
+  subject(:question) { described_class.new(question_id, question_definition, page, joint_purchase:) }
 
   let(:question_id) { nil }
   let(:question_definition) { nil }
   let(:page) { instance_double(Form::Page) }
+  let(:joint_purchase) { false }
 
   it "has correct page" do
     expect(question.page).to eq(page)
@@ -15,12 +16,26 @@ RSpec.describe Form::Sales::Questions::StaircaseOwned, type: :model do
     expect(question.id).to eq("stairowned")
   end
 
-  it "has the correct header" do
-    expect(question.header).to eq("What percentage of the property does the buyer now own in total?")
+  context "when a joint purchase" do
+    let(:joint_purchase) { true }
+
+    it "has the correct header" do
+      expect(question.header).to eq("What percentage of the property do the buyers now own in total?")
+    end
+
+    it "has the correct check_answer_label" do
+      expect(question.check_answer_label).to eq("Percentage the buyers now own in total")
+    end
   end
 
-  it "has the correct check_answer_label" do
-    expect(question.check_answer_label).to eq("Percentage the buyer now owns in total")
+  context "when not a joint purchase" do
+    it "has the correct header" do
+      expect(question.header).to eq("What percentage of the property does the buyer now own in total?")
+    end
+
+    it "has the correct check_answer_label" do
+      expect(question.check_answer_label).to eq("Percentage the buyer now owns in total")
+    end
   end
 
   it "has the correct type" do
diff --git a/spec/models/form/sales/subsections/income_benefits_and_savings_spec.rb b/spec/models/form/sales/subsections/income_benefits_and_savings_spec.rb
index 6c0997fd2..aef451878 100644
--- a/spec/models/form/sales/subsections/income_benefits_and_savings_spec.rb
+++ b/spec/models/form/sales/subsections/income_benefits_and_savings_spec.rb
@@ -35,7 +35,8 @@ RSpec.describe Form::Sales::Subsections::IncomeBenefitsAndSavings, type: :model
             savings
             savings_value_check
             savings_deposit_value_check
-            previous_ownership
+            previous_ownership_joint_purchase
+            previous_ownership_not_joint_purchase
           ],
         )
       end
@@ -62,7 +63,8 @@ RSpec.describe Form::Sales::Subsections::IncomeBenefitsAndSavings, type: :model
             savings
             savings_value_check
             savings_deposit_value_check
-            previous_ownership
+            previous_ownership_joint_purchase
+            previous_ownership_not_joint_purchase
             previous_shared
           ],
         )
diff --git a/spec/models/form/sales/subsections/shared_ownership_scheme_spec.rb b/spec/models/form/sales/subsections/shared_ownership_scheme_spec.rb
index ee9f624aa..3c189f93f 100644
--- a/spec/models/form/sales/subsections/shared_ownership_scheme_spec.rb
+++ b/spec/models/form/sales/subsections/shared_ownership_scheme_spec.rb
@@ -16,14 +16,16 @@ RSpec.describe Form::Sales::Subsections::SharedOwnershipScheme, type: :model do
       %w[
         living_before_purchase_shared_ownership
         staircasing
-        about_staircasing
+        about_staircasing_joint_purchase
+        about_staircasing_not_joint_purchase
         staircase_bought_value_check
         resale
         exchange_contracts
         handover_date
         handover_date_check
         la_nominations
-        buyer_previous
+        buyer_previous_joint_purchase
+        buyer_previous_not_joint_purchase
         previous_bedrooms
         previous_property_type
         shared_ownership_previous_tenure