diff --git a/app/models/case_log.rb b/app/models/case_log.rb
index ef9f5a91a..6b602362f 100644
--- a/app/models/case_log.rb
+++ b/app/models/case_log.rb
@@ -274,6 +274,14 @@ class CaseLog < ApplicationRecord
     landlord == 1
   end
 
+  def other_landlord?
+    landlord == 2
+  end
+
+  def local_housing_referral?
+    referral == 3
+  end
+
   def is_prevten_la_general_needs?
     [30, 31].any?(prevten)
   end
diff --git a/app/models/validations/household_validations.rb b/app/models/validations/household_validations.rb
index cd8bc912b..a980e94be 100644
--- a/app/models/validations/household_validations.rb
+++ b/app/models/validations/household_validations.rb
@@ -109,6 +109,10 @@ module Validations::HouseholdValidations
       record.errors.add :referral, I18n.t("validations.household.referral.la_general_needs.internal_transfer")
       record.errors.add :prevten, I18n.t("validations.household.prevten.la_general_needs.internal_transfer")
     end
+
+    if record.other_landlord? && record.local_housing_referral?
+      record.errors.add :referral, I18n.t("validations.household.referral.prp.local_housing_referral")
+    end
   end
 
   def validate_prevloc(record)
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 91cdfa7e2..afd547079 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -191,6 +191,8 @@ en:
         reason_permanently_decanted: "Answer must be internal transfer as you already told us the tenant was permanently decanted from another property owned by this landlord"
         la_general_needs:
           internal_transfer: "Answer cannot be internal transfer as you already told us it's the same landlord on the tenancy agreement and the household had either a fixed-term or lifetime local authority general needs tenancy immediately before this letting"
+        prp:
+          local_housing_referral: "Answer cannot be 'nominated by a local housing authority' as you already told us it's another landlord on the tenancy agreement"
       homeless:
         assessed:
           internal_transfer: "Answer cannot be assessed as homeless as you already told us this tenancy is an internal transfer"
diff --git a/spec/models/validations/household_validations_spec.rb b/spec/models/validations/household_validations_spec.rb
index 9d1a00282..36edd3f12 100644
--- a/spec/models/validations/household_validations_spec.rb
+++ b/spec/models/validations/household_validations_spec.rb
@@ -215,6 +215,24 @@ RSpec.describe Validations::HouseholdValidations do
           .to include(match(I18n.t("validations.household.prevten.la_general_needs.internal_transfer")))
       end
     end
+
+    context "when referral is nominated by a local housing authority" do
+      it "cannot have `other landlord`" do
+        record.landlord = 2
+        record.referral = 3
+        household_validator.validate_referral(record)
+        expect(record.errors["referral"])
+          .to include(match(I18n.t("validations.household.referral.prp.local_housing_referral")))
+      end
+
+      it "can have `this landlord`" do
+        record.referral = 3
+        record.landlord = 1
+        household_validator.validate_referral(record)
+        expect(record.errors["referral"])
+          .to be_empty
+      end
+    end
   end
 
   describe "armed forces validations" do