diff --git a/mmv1/products/apphub/ServiceProjectAttachment.yaml b/mmv1/products/apphub/ServiceProjectAttachment.yaml
new file mode 100644
index 000000000000..724f60dc7d0e
--- /dev/null
+++ b/mmv1/products/apphub/ServiceProjectAttachment.yaml
@@ -0,0 +1,110 @@
+# Copyright 2024 Google Inc.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+--- !ruby/object:Api::Resource
+base_url: projects/{{project}}/locations/global/serviceProjectAttachments
+create_url: projects/{{project}}/locations/global/serviceProjectAttachments?serviceProjectAttachmentId={{service_project_attachment_id}}
+self_link: projects/{{project}}/locations/global/serviceProjectAttachments/{{service_project_attachment_id}}
+id_format: projects/{{project}}/locations/global/serviceProjectAttachments/{{service_project_attachment_id}}
+import_format:
+  - projects/{{project}}/locations/global/serviceProjectAttachments/{{service_project_attachment_id}}
+name: ServiceProjectAttachment
+description: |
+  Represents a Service project attachment to the Host Project.
+immutable: true
+autogen_async: true
+custom_code: !ruby/object:Provider::Terraform::CustomCode
+  constants: 'templates/terraform/constants/apphub_service_project.go.erb'
+examples:
+  - !ruby/object:Provider::Terraform::Examples
+    name: "service_project_attachment_basic"
+    pull_external: true
+    primary_resource_id: "example"
+    config_path: "templates/terraform/examples/apphub_service_project_attachment_basic.tf.erb"
+    vars:
+      service_project_attachment_id: "project-1"
+    test_env_vars:
+      org_id: :ORG_ID
+      host_project: :PROJECT_NAME
+  - !ruby/object:Provider::Terraform::Examples
+    name: "service_project_attachment_full"
+    pull_external: true
+    primary_resource_id: "example2"
+    config_path: "templates/terraform/examples/apphub_service_project_attachment_full.tf.erb"
+    vars:
+      service_project_attachment_id: "project-1"
+    test_env_vars:
+      org_id: :ORG_ID
+      host_project: :PROJECT_NAME
+properties:
+  - !ruby/object:Api::Type::String
+    name: name
+    output: true
+    description: |
+      "Identifier. The resource name of a ServiceProjectAttachment. Format:\"projects/{host-project-id}/locations/global/serviceProjectAttachments/{service-project-id}.\" "
+  - !ruby/object:Api::Type::String
+    name: serviceProject
+    diff_suppress_func: 'ServiceProjectDiffSuppress'
+    custom_expand: 'templates/terraform/custom_expand/apphub_service_project.go.erb'
+    custom_flatten: 'templates/terraform/custom_flatten/apphub_service_project.go.erb'
+    description: |
+      "Immutable. Service project name in the format: \"projects/abc\"
+      or \"projects/123\". As input, project name with either project id or number
+      are accepted. As output, this field will contain project number. "
+    immutable: true
+  - !ruby/object:Api::Type::String
+    name: createTime
+    description: 'Output only. Create time. '
+    output: true
+  - !ruby/object:Api::Type::String
+    name: uid
+    description: "Output only. A globally unique identifier (in UUID4 format) for the `ServiceProjectAttachment`. "
+    output: true
+  - !ruby/object:Api::Type::Enum
+    name: 'state'
+    description: |
+      ServiceProjectAttachment state.
+    output: true
+    values:
+      - :STATE_UNSPECIFIED
+      - :CREATING
+      - :ACTIVE
+      - :DELETING
+parameters:
+  - !ruby/object:Api::Type::String
+    name: serviceProjectAttachmentId
+    description: "Required. The service project attachment identifier must contain the
+      project_id of the service project specified in the service_project_attachment.service_project
+      field. Hint: \"projects/{project_id}\" "
+    url_param_only: true
+    required: true
+    immutable: true
+async: !ruby/object:Api::OpAsync
+  operation: !ruby/object:Api::OpAsync::Operation
+    path: name
+    base_url: "{{op_id}}"
+    wait_ms: 1000
+    timeouts:
+  result: !ruby/object:Api::OpAsync::Result
+    path: response
+    resource_inside_response: true
+  status: !ruby/object:Api::OpAsync::Status
+    path: done
+    complete: true
+    allowed:
+      - true
+      - false
+  error: !ruby/object:Api::OpAsync::Error
+    path: error
+    message: message
diff --git a/mmv1/templates/terraform/constants/apphub_service_project.go.erb b/mmv1/templates/terraform/constants/apphub_service_project.go.erb
new file mode 100644
index 000000000000..55e38f6b1d44
--- /dev/null
+++ b/mmv1/templates/terraform/constants/apphub_service_project.go.erb
@@ -0,0 +1,4 @@
+// Suppress all diff for the field Service Project
+func ServiceProjectDiffSuppress(_, _, _ string, _ *schema.ResourceData) bool {
+	return true
+}
\ No newline at end of file
diff --git a/mmv1/templates/terraform/custom_expand/apphub_service_project.go.erb b/mmv1/templates/terraform/custom_expand/apphub_service_project.go.erb
new file mode 100644
index 000000000000..716466f55f9b
--- /dev/null
+++ b/mmv1/templates/terraform/custom_expand/apphub_service_project.go.erb
@@ -0,0 +1,6 @@
+func expand<%= prefix -%><%= titlelize_property(property) -%>(v interface{}, d tpgresource.TerraformResourceData, config *transport_tpg.Config) (interface{}, error) {
+  
+  service_project := "projects/" + d.Get("service_project_attachment_id").(string)
+
+  return service_project, nil
+}
diff --git a/mmv1/templates/terraform/custom_flatten/apphub_service_project.go.erb b/mmv1/templates/terraform/custom_flatten/apphub_service_project.go.erb
new file mode 100644
index 000000000000..05cb8d57c1d5
--- /dev/null
+++ b/mmv1/templates/terraform/custom_flatten/apphub_service_project.go.erb
@@ -0,0 +1,3 @@
+func flatten<%= prefix -%><%= titlelize_property(property) -%>(v interface{}, d *schema.ResourceData, config *transport_tpg.Config) interface{} {
+	return nil
+}
diff --git a/mmv1/templates/terraform/examples/apphub_service_project_attachment_basic.tf.erb b/mmv1/templates/terraform/examples/apphub_service_project_attachment_basic.tf.erb
new file mode 100644
index 000000000000..33d835bacc44
--- /dev/null
+++ b/mmv1/templates/terraform/examples/apphub_service_project_attachment_basic.tf.erb
@@ -0,0 +1,16 @@
+resource "google_apphub_service_project_attachment" "<%= ctx[:primary_resource_id] %>" {
+  service_project_attachment_id = google_project.service_project.project_id
+  depends_on = [time_sleep.wait_120s]
+}
+
+resource "google_project" "service_project" {
+  project_id ="<%= ctx[:vars]['service_project_attachment_id'] %>"
+  name = "Service Project"
+  org_id = "<%= ctx[:test_env_vars]['org_id'] %>"
+}
+
+resource "time_sleep" "wait_120s" {
+  depends_on = [google_project.service_project]
+
+  create_duration = "120s"
+}
diff --git a/mmv1/templates/terraform/examples/apphub_service_project_attachment_full.tf.erb b/mmv1/templates/terraform/examples/apphub_service_project_attachment_full.tf.erb
new file mode 100644
index 000000000000..f88c9b9ab7fa
--- /dev/null
+++ b/mmv1/templates/terraform/examples/apphub_service_project_attachment_full.tf.erb
@@ -0,0 +1,17 @@
+resource "google_apphub_service_project_attachment" "<%= ctx[:primary_resource_id] %>" {
+  service_project_attachment_id = google_project.service_project_full.project_id
+  service_project = google_project.service_project_full.project_id
+  depends_on = [time_sleep.wait_120s]
+}
+
+resource "google_project" "service_project_full" {
+  project_id ="<%= ctx[:vars]['service_project_attachment_id'] %>"
+  name = "Service Project Full"
+  org_id = "<%= ctx[:test_env_vars]['org_id'] %>"
+}
+
+resource "time_sleep" "wait_120s" {
+  depends_on = [google_project.service_project_full]
+
+  create_duration = "120s"
+}