diff --git a/app/models/case_log.rb b/app/models/case_log.rb
index 39519b645..8aa4c3be1 100644
--- a/app/models/case_log.rb
+++ b/app/models/case_log.rb
@@ -219,6 +219,13 @@ class CaseLog < ApplicationRecord
     rent_type == 2 || rent_type == 4
   end
 
+  def previous_tenancy_was_foster_care?
+    prevten == 13
+  end
+
+  def previous_tenancy_was_refuge?
+    prevten == 21
+  end
 private
 
   PIO = Postcodes::IO.new
diff --git a/app/models/validations/household_validations.rb b/app/models/validations/household_validations.rb
index 43ca6debd..3f410a007 100644
--- a/app/models/validations/household_validations.rb
+++ b/app/models/validations/household_validations.rb
@@ -64,6 +64,22 @@ module Validations::HouseholdValidations
     if record.is_relet_to_temp_tenant? && !record.previous_tenancy_was_temporary?
       record.errors.add :prevten, I18n.t("validations.household.prevten.non_temp_accommodation")
     end
+
+    if record.age1.present? && record.age1 > 19 && record.previous_tenancy_was_foster_care?
+      record.errors.add :prevten, I18n.t("validations.household.prevten.over_20_foster_care")
+      record.errors.add :age1, I18n.t("validations.household.age.lead.over_20")
+    end
+
+    if record.sex1 == "M" && record.previous_tenancy_was_refuge?
+      record.errors.add :prevten, I18n.t("validations.household.prevten.male_refuge")
+      record.errors.add :sex1, I18n.t("validations.household.gender.male_refuge")
+    end
+
+    if record.is_internal_transfer? && [3, 4, 10, 13, 19, 23, 24, 25, 26, 28, 29].include?(record.prevten)
+      label = record.form.get_question("prevten").present? ? record.form.get_question("prevten").label_from_value(record.prevten) : ""
+      record.errors.add :prevten, I18n.t("validations.household.prevten.internal_transfer", prevten: label)
+      record.errors.add :referral, I18n.t("validations.household.referral.prevten_invalid", prevten: label)
+    end
   end
 
   def validate_referral(record)
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 2adf00a4e..f73a277cd 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -109,6 +109,8 @@ en:
       age:
         retired_male: "Male tenant who is retired must be 65 or over"
         retired_female: "Female tenant who is retired must be 60 or over"
+        lead:
+          over_20: "Lead tenant must be under 20 as you told us that their housing situation immediately before this letting was a children's home or foster care"
       ecstat:
         retired_over_70: "Tenant %{person_num} must be retired if over 70"
         child_under_16: "Tenant %{person_num} economic status must be Child under 16 if their age is under 16"
@@ -120,12 +122,16 @@ en:
         one_or_two_choices: "Only one box must be ticked or 'other disabilities' plus one of mobility disabilities"
       prevten:
         non_temp_accommodation: "Answer cannot be non-temporary accommodation as you already told us this is a re-let to tenant who occupied the same property as temporary accommodation"
+        over_20_foster_care: "Answer cannot be children's home or foster care as the lead tenant is 20 or older"
+        male_refuge: "Answer cannot be refuge as the lead tenant identifies as male"
+        internal_transfer: "Answer cannot be %{prevten} as you already told us this tenancy is an internal transfer"
       referral:
         secure_tenancy: "Answer must be internal transfer as you already told us this is a secure tenancy"
         rsnvac_non_temp: "Answer cannot be this source of referral as you already told us this is a re-let to tenant who occupied the same property as temporary accommodation"
         cannot_be_secure_tenancy: "Answer cannot be secure tenancy as you already told us this is not an internal transfer"
         assessed_homeless: "Answer cannot be internal transfer as you already told us the tenant was assessed as homeless"
         other_homeless: "Answer cannot be internal transfer as you already told us the tenant was considered homeless by their landlord"
+        prevten_invalid: "Answer cannot be internal transfer as you already told us the source of referral for this letting was %{prevten}"
       homeless:
         assessed:
           internal_transfer: "Answer cannot be assessed as homeless as you already told us this tenancy is an internal transfer"
@@ -134,6 +140,8 @@ en:
         reasonpref:
           not_homeless: "Answer cannot be ‘no’ as you already told us the tenant was homeless or about to lose their home"
       previous_la_known: "Enter a local authority"
+      gender:
+        male_refuge: "Answer cannot be refuge as the lead tenant identifies as male"
 
     tenancy:
       length:
diff --git a/spec/models/validations/household_validations_spec.rb b/spec/models/validations/household_validations_spec.rb
index 5d31c7ebd..b07e6adbb 100644
--- a/spec/models/validations/household_validations_spec.rb
+++ b/spec/models/validations/household_validations_spec.rb
@@ -561,5 +561,51 @@ RSpec.describe Validations::HouseholdValidations do
           .to include(match I18n.t("validations.household.prevten.non_temp_accommodation"))
       end
     end
+
+    context "when the lead tenant is over 20" do
+      it "cannot be children's home/foster care" do
+        record.prevten = 13
+        record.age1 = 21
+        household_validator.validate_previous_housing_situation(record)
+        expect(record.errors["prevten"])
+          .to include(match I18n.t("validations.household.prevten.over_20_foster_care"))
+        expect(record.errors["age1"])
+          .to include(match I18n.t("validations.household.age.lead.over_20"))
+      end
+    end
+
+    context "when the lead tenant is male" do
+      it "cannot be refuge" do
+        record.prevten = 21
+        record.sex1 = "M"
+        household_validator.validate_previous_housing_situation(record)
+        expect(record.errors["prevten"])
+          .to include(match I18n.t("validations.household.prevten.male_refuge"))
+        expect(record.errors["sex1"])
+          .to include(match I18n.t("validations.household.gender.male_refuge"))
+      end
+    end
+
+    context "when the referral is internal transfer" do
+      it "cannot be 3" do
+        record.referral = 1
+        record.prevten = 3
+        household_validator.validate_previous_housing_situation(record)
+        expect(record.errors["prevten"])
+          .to include(match I18n.t("validations.household.prevten.internal_transfer", prevten: ""))
+        expect(record.errors["referral"])
+          .to include(match I18n.t("validations.household.referral.prevten_invalid", prevten: ""))
+      end
+
+      it "cannot be 4, 10, 13, 19, 23, 24, 25, 26, 28, 29" do
+        record.referral = 1
+        record.prevten = 4
+        household_validator.validate_previous_housing_situation(record)
+        expect(record.errors["prevten"])
+          .to include(match I18n.t("validations.household.prevten.internal_transfer", prevten: ""))
+        expect(record.errors["referral"])
+          .to include(match I18n.t("validations.household.referral.prevten_invalid", prevten: ""))
+      end
+    end
   end
 end