diff --git a/app/services/bulk_upload/lettings/year2024/row_parser.rb b/app/services/bulk_upload/lettings/year2024/row_parser.rb
index cbb7a1087..51c7da6a7 100644
--- a/app/services/bulk_upload/lettings/year2024/row_parser.rb
+++ b/app/services/bulk_upload/lettings/year2024/row_parser.rb
@@ -412,6 +412,7 @@ class BulkUpload::Lettings::Year2024::RowParser
   validate :validate_address_option_found, on: :after_log
 
   validate :validate_uprn_exists_if_any_key_address_fields_are_blank, on: :after_log, unless: -> { supported_housing? }
+  validate :validate_address_fields, on: :after_log
 
   validate :validate_incomplete_soft_validations, on: :after_log
   validate :validate_nationality, on: :after_log
@@ -581,6 +582,18 @@ private
     end
   end
 
+  def validate_address_fields
+    if field_16.blank? || log.errors.attribute_names.include?(:uprn)
+      if field_17.blank?
+        errors.add(:field_17, I18n.t("validations.not_answered", question: "address line 1"))
+      end
+
+      if field_19.blank?
+        errors.add(:field_19, I18n.t("validations.not_answered", question: "town or city"))
+      end
+    end
+  end
+
   def validate_incomplete_soft_validations
     routed_to_soft_validation_questions = log.form.questions.filter { |q| q.type == "interruption_screen" && q.page.routed_to?(log, nil) }.compact
     routed_to_soft_validation_questions.each do |question|
diff --git a/spec/services/bulk_upload/lettings/year2024/row_parser_spec.rb b/spec/services/bulk_upload/lettings/year2024/row_parser_spec.rb
index a420f370b..2dc429660 100644
--- a/spec/services/bulk_upload/lettings/year2024/row_parser_spec.rb
+++ b/spec/services/bulk_upload/lettings/year2024/row_parser_spec.rb
@@ -1495,10 +1495,10 @@ RSpec.describe BulkUpload::Lettings::Year2024::RowParser do
             field_1: "1" }
         end
 
-        it "does not add UPRN errors" do
+        it "does not add UPRN errors (but still adds missing address errors)" do
           expect(parser.errors[:field_16]).to be_empty
-          expect(parser.errors[:field_17]).to be_empty
-          expect(parser.errors[:field_19]).to be_empty
+          expect(parser.errors[:field_17]).to eql(["You must answer address line 1"])
+          expect(parser.errors[:field_19]).to eql(["You must answer town or city"])
         end
       end