diff --git a/app/services/documentation_generator.rb b/app/services/documentation_generator.rb
index c3c948f81..c2005f320 100644
--- a/app/services/documentation_generator.rb
+++ b/app/services/documentation_generator.rb
@@ -100,18 +100,9 @@ class DocumentationGenerator
     end
   end
 
-  def get_all_sales_methods
-    validation_classes = [Validations::Sales::SetupValidations,
-                          Validations::Sales::HouseholdValidations,
-                          Validations::Sales::PropertyValidations,
-                          Validations::Sales::FinancialValidations,
-                          Validations::Sales::SaleInformationValidations,
-                          Validations::SharedValidations,
-                          Validations::LocalAuthorityValidations]
-
+  def validation_and_helper_methods(validation_classes)
     all_validation_methods = validation_classes.map(&:instance_methods).flatten.select { |method| method.starts_with?("validate_") }.uniq
     all_methods = validation_classes.map { |x| x.instance_methods + x.private_instance_methods }.flatten.uniq
-
     all_helper_methods = all_methods - all_validation_methods
     [all_validation_methods, all_helper_methods]
   end
@@ -122,20 +113,6 @@ class DocumentationGenerator
     [all_helper_methods, all_validation_methods]
   end
 
-  def get_all_lettings_methods
-    validation_classes = [Validations::SetupValidations,
-                          Validations::HouseholdValidations,
-                          Validations::PropertyValidations,
-                          Validations::FinancialValidations,
-                          Validations::TenancyValidations,
-                          Validations::DateValidations,
-                          Validations::LocalAuthorityValidations]
-    all_validation_methods = validation_classes.map(&:instance_methods).flatten.select { |method| method.starts_with?("validate_") }.uniq
-    all_methods = validation_classes.map { |x| x.instance_methods + x.private_instance_methods }.flatten.uniq
-    all_helper_methods = all_methods - all_validation_methods
-    [all_validation_methods, all_helper_methods]
-  end
-
   def get_soft_lettings_methods
     all_helper_methods = Validations::SoftValidations.private_instance_methods
     all_validation_methods = Validations::SoftValidations.instance_methods
diff --git a/lib/tasks/generate_lettings_documentation.rake b/lib/tasks/generate_lettings_documentation.rake
index 422e9bf2d..5c2ff6f20 100644
--- a/lib/tasks/generate_lettings_documentation.rake
+++ b/lib/tasks/generate_lettings_documentation.rake
@@ -10,7 +10,14 @@ namespace :generate_lettings_documentation do
     client = OpenAI::Client.new(access_token: ENV["OPENAI_API_KEY"])
 
     documentation_generator = DocumentationGenerator.new
-    all_validation_methods, all_helper_methods = documentation_generator.get_all_lettings_methods
+    validation_classes = [Validations::SetupValidations,
+                          Validations::HouseholdValidations,
+                          Validations::PropertyValidations,
+                          Validations::FinancialValidations,
+                          Validations::TenancyValidations,
+                          Validations::DateValidations,
+                          Validations::LocalAuthorityValidations]
+    all_validation_methods, all_helper_methods = documentation_generator.validation_and_helper_methods(validation_classes)
 
     documentation_generator.describe_hard_validations(client, form, all_validation_methods, all_helper_methods, "lettings")
   end
diff --git a/lib/tasks/generate_sales_documentation.rake b/lib/tasks/generate_sales_documentation.rake
index df6b31a60..4a7ff7568 100644
--- a/lib/tasks/generate_sales_documentation.rake
+++ b/lib/tasks/generate_sales_documentation.rake
@@ -10,7 +10,14 @@ namespace :generate_sales_documentation do
     client = OpenAI::Client.new(access_token: ENV["OPENAI_API_KEY"])
 
     documentation_generator = DocumentationGenerator.new
-    all_validation_methods, all_helper_methods = documentation_generator.get_all_sales_methods
+    validation_classes = [Validations::Sales::SetupValidations,
+                          Validations::Sales::HouseholdValidations,
+                          Validations::Sales::PropertyValidations,
+                          Validations::Sales::FinancialValidations,
+                          Validations::Sales::SaleInformationValidations,
+                          Validations::SharedValidations,
+                          Validations::LocalAuthorityValidations]
+    all_validation_methods, all_helper_methods = documentation_generator.validation_and_helper_methods(validation_classes)
     documentation_generator.describe_hard_validations(client, form, all_validation_methods, all_helper_methods, "sales")
   end
 
diff --git a/spec/lib/tasks/generate_lettings_documentation_spec.rb b/spec/lib/tasks/generate_lettings_documentation_spec.rb
index 3f75b458d..d7c39496d 100644
--- a/spec/lib/tasks/generate_lettings_documentation_spec.rb
+++ b/spec/lib/tasks/generate_lettings_documentation_spec.rb
@@ -67,7 +67,7 @@ RSpec.describe "generate_lettings_documentation" do
   describe ":describe_lettings_validations", type: :task do
     subject(:task) { Rake::Task["generate_lettings_documentation:describe_lettings_validations"] }
 
-    let(:documentation_generator) { instance_double(DocumentationGenerator, describe_bu_validations: nil, get_all_lettings_methods: []) }
+    let(:documentation_generator) { instance_double(DocumentationGenerator, describe_bu_validations: nil, validation_and_helper_methods: []) }
     let(:client) { instance_double(OpenAI::Client) }
 
     before do
diff --git a/spec/lib/tasks/generate_sales_documentation_spec.rb b/spec/lib/tasks/generate_sales_documentation_spec.rb
index fbda8036a..fb35203b1 100644
--- a/spec/lib/tasks/generate_sales_documentation_spec.rb
+++ b/spec/lib/tasks/generate_sales_documentation_spec.rb
@@ -67,7 +67,7 @@ RSpec.describe "generate_sales_documentation" do
   describe ":describe_sales_validations", type: :task do
     subject(:task) { Rake::Task["generate_sales_documentation:describe_sales_validations"] }
 
-    let(:documentation_generator) { instance_double(DocumentationGenerator, describe_bu_validations: nil, get_all_sales_methods: []) }
+    let(:documentation_generator) { instance_double(DocumentationGenerator, describe_bu_validations: nil, validation_and_helper_methods: []) }
     let(:client) { instance_double(OpenAI::Client) }
 
     before do