diff --git a/app/models/validations/sales/sale_information_validations.rb b/app/models/validations/sales/sale_information_validations.rb
index c42c42ccc..30c9a7584 100644
--- a/app/models/validations/sales/sale_information_validations.rb
+++ b/app/models/validations/sales/sale_information_validations.rb
@@ -54,4 +54,12 @@ module Validations::Sales::SaleInformationValidations
       end
     end
   end
+
+  def validate_mortgage_length(record)
+    return unless record.mortlen
+
+    return if record.mortlen >= 0 && record.mortlen <= 60
+
+    record.errors.add :mortlen, I18n.t("validations.sale_information.mortlen.range")
+  end
 end
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 3dd612e8e..0c53616a4 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -426,6 +426,8 @@ en:
       previous_property_type:
         property_type_bedsit: "A bedsit can not have more than 1 bedroom"
       discounted_ownership_value: "Mortgage, deposit, and grant total must equal £%{value_with_discount}"
+      mortlen:
+        range: Mortgage length must be between 0 and 60
 
   soft_validations:
     net_income:
diff --git a/spec/models/validations/sales/sale_information_validations_spec.rb b/spec/models/validations/sales/sale_information_validations_spec.rb
index d2921e8f0..29a162337 100644
--- a/spec/models/validations/sales/sale_information_validations_spec.rb
+++ b/spec/models/validations/sales/sale_information_validations_spec.rb
@@ -145,7 +145,7 @@ RSpec.describe Validations::Sales::SaleInformationValidations do
 
   describe "#validate_previous_property_unit_type" do
     context "when number of bedrooms is <= 1" do
-      let(:record) { FactoryBot.build(:sales_log, frombeds: 1, fromprop: 2) }
+      let(:record) { build(:sales_log, frombeds: 1, fromprop: 2) }
 
       it "does not add an error if it's a bedsit" do
         sale_information_validator.validate_previous_property_unit_type(record)
@@ -155,7 +155,7 @@ RSpec.describe Validations::Sales::SaleInformationValidations do
     end
 
     context "when number of bedrooms is > 1" do
-      let(:record) { FactoryBot.build(:sales_log, frombeds: 2, fromprop: 2) }
+      let(:record) { build(:sales_log, frombeds: 2, fromprop: 2) }
 
       it "does add an error if it's a bedsit" do
         sale_information_validator.validate_previous_property_unit_type(record)
@@ -371,4 +371,36 @@ RSpec.describe Validations::Sales::SaleInformationValidations do
       end
     end
   end
+
+  describe "#validate_mortgage_length" do
+    context "when mortlen is < 0" do
+      let(:record) { build(:sales_log, mortlen: -1) }
+
+      it "does not add an error if it's a bedsit" do
+        sale_information_validator.validate_mortgage_length(record)
+
+        expect(record.errors[:mortlen]).to include(I18n.t("validations.sale_information.mortlen.range"))
+      end
+    end
+
+    context "when 0<= mortlen <= 60" do
+      let(:record) { build(:sales_log, mortlen: 20) }
+
+      it "does not add an error if it's a bedsit" do
+        sale_information_validator.validate_mortgage_length(record)
+
+        expect(record.errors).to be_empty
+      end
+    end
+
+    context "when mortlen > 60" do
+      let(:record) { build(:sales_log, mortlen: 61) }
+
+      it "does not add an error if it's a bedsit" do
+        sale_information_validator.validate_mortgage_length(record)
+
+        expect(record.errors[:mortlen]).to include(I18n.t("validations.sale_information.mortlen.range"))
+      end
+    end
+  end
 end