diff --git a/app/views/layouts/project.html.haml b/app/views/layouts/project.html.haml
index a54e0351d2f1c3a9f6fb53e0a6fec2eb37bbe522..7e69cf1d6857553d19834e46bcbff49fafe42988 100644
--- a/app/views/layouts/project.html.haml
+++ b/app/views/layouts/project.html.haml
@@ -8,6 +8,9 @@
 - @left_sidebar = true
 - @content_class = [@content_class, project_classes(@project)].compact.join(" ")
 
+- content_for :flash_message do
+  = render "layouts/header/storage_enforcement_banner", namespace: @project.namespace
+
 - content_for :project_javascripts do
   - project = @target_project || @project
   - if current_user
diff --git a/ee/spec/features/boards/scoped_issue_board_spec.rb b/ee/spec/features/boards/scoped_issue_board_spec.rb
index ad5765f99a9b902ca979b0fe3f7b43437df2263b..57bed59dc2e8f85055429e4e32cf322f83450628 100644
--- a/ee/spec/features/boards/scoped_issue_board_spec.rb
+++ b/ee/spec/features/boards/scoped_issue_board_spec.rb
@@ -390,7 +390,7 @@
 
               expect(page).to have_selector('.board-card', count: 0)
 
-              expect(page).not_to have_selector('.gl-alert-body')
+              expect(page).not_to have_text('Unable to save your changes. Please try again.')
             end
           end
 
@@ -422,7 +422,7 @@
               update_board_scope('current_iteration', false)
 
               expect(page).to have_selector('.board-card', count: 3)
-              expect(page).not_to have_selector('.gl-alert-body')
+              expect(page).not_to have_text('Unable to save your changes. Please try again.')
             end
           end
         end
@@ -439,7 +439,7 @@
 
             click_button 'Save changes'
 
-            expect(page).to have_selector('.gl-alert-body')
+            expect(page).to have_text('Unable to save your changes. Please try again.')
           end
         end
       end
diff --git a/spec/features/groups_spec.rb b/spec/features/groups_spec.rb
index 31390b110e7f7e8b1830e39664ef2d23e26fe0c3..58443b66858a51698ca14d936dc52c068804ebeb 100644
--- a/spec/features/groups_spec.rb
+++ b/spec/features/groups_spec.rb
@@ -499,8 +499,6 @@ def remove_with_confirm(button_text, confirm_with)
     let_it_be_with_refind(:user) { create(:user) }
 
     before do
-      stub_feature_flags(namespace_storage_limit_bypass_date_check: false)
-
       group.add_owner(user)
       sign_in(user)
     end
@@ -509,8 +507,8 @@ def remove_with_confirm(button_text, confirm_with)
       let_it_be(:storage_enforcement_date) { Date.today + 30 }
 
       before do
-        allow_next_found_instance_of(Group) do |g|
-          allow(g).to receive(:storage_enforcement_date).and_return(storage_enforcement_date)
+        allow_next_found_instance_of(Group) do |grp|
+          allow(grp).to receive(:storage_enforcement_date).and_return(storage_enforcement_date)
         end
       end
 
@@ -520,8 +518,8 @@ def remove_with_confirm(button_text, confirm_with)
       end
 
       it 'does not display the banner in a paid group page' do
-        allow_next_found_instance_of(Group) do |g|
-          allow(g).to receive(:paid?).and_return(true)
+        allow_next_found_instance_of(Group) do |grp|
+          allow(grp).to receive(:paid?).and_return(true)
         end
         visit group_path(group)
         expect_page_not_to_have_storage_enforcement_banner
@@ -531,12 +529,13 @@ def remove_with_confirm(button_text, confirm_with)
         visit group_path(group)
         expect_page_to_have_storage_enforcement_banner(storage_enforcement_date)
         find('.js-storage-enforcement-banner [data-testid="close-icon"]').click
+        wait_for_requests
         page.refresh
         expect_page_not_to_have_storage_enforcement_banner
 
         storage_enforcement_date = Date.today + 13
-        allow_next_found_instance_of(Group) do |g|
-          allow(g).to receive(:storage_enforcement_date).and_return(storage_enforcement_date)
+        allow_next_found_instance_of(Group) do |grp|
+          allow(grp).to receive(:storage_enforcement_date).and_return(storage_enforcement_date)
         end
         page.refresh
         expect_page_to_have_storage_enforcement_banner(storage_enforcement_date)
@@ -547,6 +546,7 @@ def remove_with_confirm(button_text, confirm_with)
       # This test should break and be rewritten after the implementation of the storage_enforcement_date
       # TBD: https://gitlab.com/gitlab-org/gitlab/-/issues/350632
       it 'does not display the banner in the group page' do
+        stub_feature_flags(namespace_storage_limit_bypass_date_check: false)
         visit group_path(group)
         expect_page_not_to_have_storage_enforcement_banner
       end
diff --git a/spec/features/projects_spec.rb b/spec/features/projects_spec.rb
index db64f84aa76c6919ddfaf5e185c146c32f5b3e3a..f6f9c7f0d3c767159951b834f09a6ac468605d64 100644
--- a/spec/features/projects_spec.rb
+++ b/spec/features/projects_spec.rb
@@ -440,6 +440,99 @@
     end
   end
 
+  describe 'storage_enforcement_banner', :js do
+    let_it_be(:group) { create(:group) }
+    let_it_be_with_refind(:user) { create(:user) }
+    let_it_be(:project) { create(:project, group: group) }
+
+    before do
+      group.add_maintainer(user)
+      sign_in(user)
+    end
+
+    context 'with storage_enforcement_date set' do
+      let_it_be(:storage_enforcement_date) { Date.today + 30 }
+
+      before do
+        allow_next_found_instance_of(Group) do |grp|
+          allow(grp).to receive(:storage_enforcement_date).and_return(storage_enforcement_date)
+        end
+      end
+
+      it 'displays the banner in the project page' do
+        visit project_path(project)
+        expect_page_to_have_storage_enforcement_banner(storage_enforcement_date)
+      end
+
+      context 'when in a subgroup project page' do
+        let_it_be(:subgroup) { create(:group, parent: group) }
+        let_it_be(:project) { create(:project, namespace: subgroup) }
+
+        it 'displays the banner' do
+          visit project_path(project)
+          expect_page_to_have_storage_enforcement_banner(storage_enforcement_date)
+        end
+      end
+
+      context 'when in a user namespace project page' do
+        let_it_be(:project) { create(:project, namespace: user.namespace) }
+
+        before do
+          allow_next_found_instance_of(Namespaces::UserNamespace) do |namspace|
+            allow(namspace).to receive(:storage_enforcement_date).and_return(storage_enforcement_date)
+          end
+        end
+
+        it 'displays the banner' do
+          visit project_path(project)
+          expect_page_to_have_storage_enforcement_banner(storage_enforcement_date)
+        end
+      end
+
+      it 'does not display the banner in a paid group project page' do
+        allow_next_found_instance_of(Group) do |grp|
+          allow(grp).to receive(:paid?).and_return(true)
+        end
+        visit project_path(project)
+        expect_page_not_to_have_storage_enforcement_banner
+      end
+
+      it 'does not display the banner if user has previously closed unless threshold has changed' do
+        visit project_path(project)
+        expect_page_to_have_storage_enforcement_banner(storage_enforcement_date)
+        find('.js-storage-enforcement-banner [data-testid="close-icon"]').click
+        wait_for_requests
+        page.refresh
+        expect_page_not_to_have_storage_enforcement_banner
+
+        storage_enforcement_date = Date.today + 13
+        allow_next_found_instance_of(Group) do |grp|
+          allow(grp).to receive(:storage_enforcement_date).and_return(storage_enforcement_date)
+        end
+        page.refresh
+        expect_page_to_have_storage_enforcement_banner(storage_enforcement_date)
+      end
+    end
+
+    context 'with storage_enforcement_date not set' do
+      # This test should break and be rewritten after the implementation of the storage_enforcement_date
+      # TBD: https://gitlab.com/gitlab-org/gitlab/-/issues/350632
+      it 'does not display the banner in the group page' do
+        stub_feature_flags(namespace_storage_limit_bypass_date_check: false)
+        visit project_path(project)
+        expect_page_not_to_have_storage_enforcement_banner
+      end
+    end
+  end
+
+  def expect_page_to_have_storage_enforcement_banner(storage_enforcement_date)
+    expect(page).to have_text "From #{storage_enforcement_date} storage limits will apply to this namespace"
+  end
+
+  def expect_page_not_to_have_storage_enforcement_banner
+    expect(page).not_to have_text "storage limits will apply to this namespace"
+  end
+
   def remove_with_confirm(button_text, confirm_with, confirm_button_text = 'Confirm')
     click_button button_text
     fill_in 'confirm_name_input', with: confirm_with