diff --git a/app/models/form/lettings/pages/lead_tenant_sex_registered_at_birth1.rb b/app/models/form/lettings/pages/lead_tenant_sex_registered_at_birth1.rb
new file mode 100644
index 000000000..2e80bf598
--- /dev/null
+++ b/app/models/form/lettings/pages/lead_tenant_sex_registered_at_birth1.rb
@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+class Form::Lettings::Pages::LeadTenantSexRegisteredAtBirth1 < ::Form::Page
+  def initialize(id, hsh, subsection)
+    super
+    @id = "lead_tenant_sex_registered_at_birth"
+    @depends_on = [{ "declaration" => 1 }]
+  end
+
+  def questions
+    @questions ||= [
+      Form::Sales::Questions::SexRegisteredAtBirth1.new(nil, nil, self),
+    ]
+  end
+end
diff --git a/app/models/form/lettings/pages/person_sex_registered_at_birth.rb b/app/models/form/lettings/pages/person_sex_registered_at_birth.rb
new file mode 100644
index 000000000..ea1586f5e
--- /dev/null
+++ b/app/models/form/lettings/pages/person_sex_registered_at_birth.rb
@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+class Form::Lettings::Pages::PersonSexRegisteredAtBirth < ::Form::Page
+  def initialize(id, hsh, subsection, person_index:)
+    super(id, hsh, subsection)
+    @id = "person_#{person_index}_sex_registered_at_birth"
+    @person_index = person_index
+    @depends_on = [
+      { "details_known_#{person_index}" => 0 },
+    ]
+  end
+
+  def questions
+    @questions ||= [
+      Form::Lettings::Questions::PersonSexRegisteredAtBirth.new("sexrab#{@person_index}", nil, self, person_index: @person_index),
+    ]
+  end
+end
diff --git a/app/models/form/lettings/questions/person_sex_registered_at_birth.rb b/app/models/form/lettings/questions/person_sex_registered_at_birth.rb
new file mode 100644
index 000000000..3d8db0312
--- /dev/null
+++ b/app/models/form/lettings/questions/person_sex_registered_at_birth.rb
@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+class Form::Lettings::Questions::PersonSexRegisteredAtBirth < ::Form::Question
+  def initialize(id, hsh, page, person_index:)
+    super(id, hsh, page)
+    @type = "radio"
+    @check_answers_card_number = person_index
+    @answer_options = ANSWER_OPTIONS
+    @question_number = QUESTION_NUMBER_FROM_YEAR[form.start_date.year] || QUESTION_NUMBER_FROM_YEAR[QUESTION_NUMBER_FROM_YEAR.keys.max]
+  end
+
+  ANSWER_OPTIONS = {
+    "F" => { "value" => "Female" },
+    "M" => { "value" => "Male" },
+    "divider" => { "value" => true },
+    "R" => { "value" => "Person prefers not to say" },
+  }.freeze
+
+  QUESTION_NUMBER_FROM_YEAR = { 2026 => 0 }.freeze
+end
diff --git a/app/models/form/lettings/questions/sex_registered_at_birth1.rb b/app/models/form/lettings/questions/sex_registered_at_birth1.rb
new file mode 100644
index 000000000..791504c9d
--- /dev/null
+++ b/app/models/form/lettings/questions/sex_registered_at_birth1.rb
@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+class Form::Lettings::Questions::SexRegisteredAtBirth1 < ::Form::Question
+  def initialize(id, hsh, page)
+    super
+    @id = "sexrab1"
+    @type = "radio"
+    @check_answers_card_number = 1
+    @answer_options = ANSWER_OPTIONS
+    @question_number = QUESTION_NUMBER_FROM_YEAR[form.start_date.year] || QUESTION_NUMBER_FROM_YEAR[QUESTION_NUMBER_FROM_YEAR.keys.max]
+  end
+
+  ANSWER_OPTIONS = {
+    "F" => { "value" => "Female" },
+    "M" => { "value" => "Male" },
+    "divider" => { "value" => true },
+    "R" => { "value" => "Buyer prefers not to say" },
+  }.freeze
+
+  QUESTION_NUMBER_FROM_YEAR = { 2026 => 0 }.freeze
+end