diff --git a/app/models/validations/household_validations.rb b/app/models/validations/household_validations.rb
index a593b105b..830bc3549 100644
--- a/app/models/validations/household_validations.rb
+++ b/app/models/validations/household_validations.rb
@@ -65,6 +65,13 @@ module Validations::HouseholdValidations
     end
   end
 
+  def validate_condition_effects(record)
+    all_options = [record.illness_type_1, record.illness_type_2, record.illness_type_3, record.illness_type_4, record.illness_type_5, record.illness_type_6, record.illness_type_7, record.illness_type_8, record.illness_type_9, record.illness_type_10]
+    if all_options.count(1) >= 1 && household_no_illness?(record)
+      record.errors.add :condition_effects, I18n.t("validations.household.condition_effects.no_choices")
+    end
+  end
+
   def validate_previous_housing_situation(record)
     if record.is_relet_to_temp_tenant? && !record.previous_tenancy_was_temporary?
       record.errors.add :prevten, I18n.t("validations.household.prevten.non_temp_accommodation")
@@ -107,6 +114,10 @@ module Validations::HouseholdValidations
 
 private
 
+  def household_no_illness?(record)
+    record.illness != 0
+  end
+
   def women_of_child_bearing_age_in_household(record)
     (1..8).any? do |n|
       next if record["sex#{n}"].nil? || record["age#{n}"].nil?
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 154845233..9f5d8056f 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -146,6 +146,8 @@ en:
         male_refuge: "Answer cannot be male as you told us their housing situation immediately before this letting was a refuge"
       reason:
         not_internal_transfer: "Answer cannot be permanently decanted from another property owned by this landlord as you told us the source of referral for this tenancy was not an internal transfer"
+      condition_effects:
+        no_choices: "You can not provide details about effects of conditions on any of the household members if you have not answered yes to the any of the household having a physical or mental health condition (or other illness) expected to last 12 months or more"
 
     tenancy:
       length:
diff --git a/spec/factories/case_log.rb b/spec/factories/case_log.rb
index 1c2d41850..67e6d4b32 100644
--- a/spec/factories/case_log.rb
+++ b/spec/factories/case_log.rb
@@ -51,7 +51,7 @@ FactoryBot.define do
       underoccupation_benefitcap { 0 }
       leftreg { 1 }
       reservist { 0 }
-      illness { 1 }
+      illness { 0 }
       preg_occ { 1 }
       tenancy_code { "BZ757" }
       startertenancy { 0 }
diff --git a/spec/fixtures/complete_case_log.json b/spec/fixtures/complete_case_log.json
index 6f3bf98e9..8b06563f4 100644
--- a/spec/fixtures/complete_case_log.json
+++ b/spec/fixtures/complete_case_log.json
@@ -44,7 +44,7 @@
     "underoccupation_benefitcap": 0,
     "leftreg": 1,
     "reservist": 0,
-    "illness": 1,
+    "illness": 0,
     "preg_occ": 0,
     "tenancy_code": "BZ757",
     "startdate": "12/12/2021",
diff --git a/spec/fixtures/exports/case_logs.xml b/spec/fixtures/exports/case_logs.xml
index 478f3d90f..7a1b17dbd 100644
--- a/spec/fixtures/exports/case_logs.xml
+++ b/spec/fixtures/exports/case_logs.xml
@@ -38,7 +38,7 @@
     <underoccupation_benefitcap>0</underoccupation_benefitcap>
     <leftreg>1</leftreg>
     <reservist>0</reservist>
-    <illness>1</illness>
+    <illness>0</illness>
     <preg_occ>1</preg_occ>
     <tenancy_code>BZ757</tenancy_code>
     <startertenancy>0</startertenancy>
diff --git a/spec/models/validations/household_validations_spec.rb b/spec/models/validations/household_validations_spec.rb
index b8a2dba23..5d9611620 100644
--- a/spec/models/validations/household_validations_spec.rb
+++ b/spec/models/validations/household_validations_spec.rb
@@ -482,6 +482,97 @@ RSpec.describe Validations::HouseholdValidations do
     end
   end
 
+  describe "condition effects validation" do
+    it "validates vision can't be selected if answer to anyone in household with health condition is not yes" do
+      record.illness = 1
+      record.illness_type_1 = 1
+      household_validator.validate_condition_effects(record)
+      expect(record.errors["condition_effects"])
+        .to include(match I18n.t("validations.household.condition_effects.no_choices"))
+    end
+
+    it "validates hearing can't be selected if answer to anyone in household with health condition is not yes" do
+      record.illness = 1
+      record.illness_type_2 = 1
+      household_validator.validate_condition_effects(record)
+      expect(record.errors["condition_effects"])
+        .to include(match I18n.t("validations.household.condition_effects.no_choices"))
+    end
+
+    it "validates mobility can't be selected if answer to anyone in household with health condition is not yes" do
+      record.illness = 1
+      record.illness_type_3 = 1
+      household_validator.validate_condition_effects(record)
+      expect(record.errors["condition_effects"])
+        .to include(match I18n.t("validations.household.condition_effects.no_choices"))
+    end
+
+    it "validates dexterity can't be selected if answer to anyone in household with health condition is not yes" do
+      record.illness = 1
+      record.illness_type_4 = 1
+      household_validator.validate_condition_effects(record)
+      expect(record.errors["condition_effects"])
+        .to include(match I18n.t("validations.household.condition_effects.no_choices"))
+    end
+
+    it "validates learning or understanding or concentrating can't be selected if answer to anyone in household with health condition is not yes" do
+      record.illness = 1
+      record.illness_type_5 = 1
+      household_validator.validate_condition_effects(record)
+      expect(record.errors["condition_effects"])
+        .to include(match I18n.t("validations.household.condition_effects.no_choices"))
+    end
+
+    it "validates memory can't be selected if answer to anyone in household with health condition is not yes" do
+      record.illness = 1
+      record.illness_type_6 = 1
+      household_validator.validate_condition_effects(record)
+      expect(record.errors["condition_effects"])
+        .to include(match I18n.t("validations.household.condition_effects.no_choices"))
+    end
+
+    it "validates mental health can't be selected if answer to anyone in household with health condition is not yes" do
+      record.illness = 1
+      record.illness_type_7 = 1
+      household_validator.validate_condition_effects(record)
+      expect(record.errors["condition_effects"])
+        .to include(match I18n.t("validations.household.condition_effects.no_choices"))
+    end
+
+    it "validates stamina or breathing or fatigue can't be selected if answer to anyone in household with health condition is not yes" do
+      record.illness = 1
+      record.illness_type_8 = 1
+      household_validator.validate_condition_effects(record)
+      expect(record.errors["condition_effects"])
+        .to include(match I18n.t("validations.household.condition_effects.no_choices"))
+    end
+
+    it "validates socially or behaviourally can't be selected if answer to anyone in household with health condition is not yes" do
+      record.illness = 1
+      record.illness_type_9 = 1
+      household_validator.validate_condition_effects(record)
+      expect(record.errors["condition_effects"])
+        .to include(match I18n.t("validations.household.condition_effects.no_choices"))
+    end
+
+    it "validates other can't be selected if answer to anyone in household with health condition is not yes" do
+      record.illness = 1
+      record.illness_type_10 = 1
+      household_validator.validate_condition_effects(record)
+      expect(record.errors["condition_effects"])
+        .to include(match I18n.t("validations.household.condition_effects.no_choices"))
+    end
+
+    it "expects that an illness can be selected if answer to anyone in household with health condition is yes " do
+      record.illness = 0
+      record.illness_type_1 = 1
+      record.illness_type_2 = 1
+      record.illness_type_3 = 1
+      household_validator.validate_condition_effects(record)
+      expect(record.errors["condition_effects"]).to be_empty
+    end
+  end
+
   describe "accessibility requirement validations" do
     it "validates that mutually exclusive options can't be selected together" do
       record.housingneeds_a = 1