diff --git a/.changelog/37970.txt b/.changelog/37970.txt
new file mode 100644
index 00000000000..1c97779753b
--- /dev/null
+++ b/.changelog/37970.txt
@@ -0,0 +1,3 @@
+```release-note:bug
+resource/aws_codebuild_project: Increase maximum values of `build_batch_config.timeout_in_mins` and `build_timeout` from `480` (8 hours) to `2160` (36 hours)
+```
diff --git a/internal/service/codebuild/project.go b/internal/service/codebuild/project.go
index 47d185e7f12..c263aaf3012 100644
--- a/internal/service/codebuild/project.go
+++ b/internal/service/codebuild/project.go
@@ -172,7 +172,7 @@ func resourceProject() *schema.Resource {
 						"timeout_in_mins": {
 							Type:         schema.TypeInt,
 							Optional:     true,
-							ValidateFunc: validation.IntBetween(5, 480),
+							ValidateFunc: validation.IntBetween(5, 2160),
 						},
 					},
 				},
@@ -181,7 +181,7 @@ func resourceProject() *schema.Resource {
 				Type:         schema.TypeInt,
 				Optional:     true,
 				Default:      60,
-				ValidateFunc: validation.IntBetween(5, 480),
+				ValidateFunc: validation.IntBetween(5, 2160),
 				DiffSuppressFunc: func(k, old, new string, d *schema.ResourceData) bool {
 					switch environmentType := types.EnvironmentType(d.Get("environment.0.type").(string)); environmentType {
 					case types.EnvironmentTypeArmLambdaContainer, types.EnvironmentTypeLinuxLambdaContainer:
diff --git a/internal/service/codebuild/project_test.go b/internal/service/codebuild/project_test.go
index 876fd37d68f..bd99e065ff3 100644
--- a/internal/service/codebuild/project_test.go
+++ b/internal/service/codebuild/project_test.go
@@ -1030,7 +1030,7 @@ func TestAccCodeBuildProject_buildBatchConfigDelete(t *testing.T) {
 					resource.TestCheckResourceAttr(resourceName, "build_batch_config.0.restrictions.#", acctest.Ct1),
 					resource.TestCheckResourceAttr(resourceName, "build_batch_config.0.restrictions.0.compute_types_allowed.#", acctest.Ct0),
 					resource.TestCheckResourceAttr(resourceName, "build_batch_config.0.restrictions.0.maximum_builds_allowed", acctest.Ct10),
-					resource.TestCheckResourceAttr(resourceName, "build_batch_config.0.timeout_in_mins", "480"),
+					resource.TestCheckResourceAttr(resourceName, "build_batch_config.0.timeout_in_mins", "2160"),
 				),
 			},
 			{
@@ -3918,7 +3918,7 @@ build_batch_config {
   }
 
   service_role    = aws_iam_role.test.arn
-  timeout_in_mins = 480
+  timeout_in_mins = 2160
 }
 `
 
diff --git a/website/docs/cdktf/python/r/codebuild_project.html.markdown b/website/docs/cdktf/python/r/codebuild_project.html.markdown
index 2283795513e..dc84f0ec5d3 100644
--- a/website/docs/cdktf/python/r/codebuild_project.html.markdown
+++ b/website/docs/cdktf/python/r/codebuild_project.html.markdown
@@ -208,7 +208,7 @@ The following arguments are optional:
 
 * `badge_enabled` - (Optional) Generates a publicly-accessible URL for the projects build badge. Available as `badge_url` attribute when enabled.
 * `build_batch_config` - (Optional) Defines the batch build options for the project.
-* `build_timeout` - (Optional) Number of minutes, from 5 to 480 (8 hours), for AWS CodeBuild to wait until timing out any related build that does not get marked as completed. The default is 60 minutes. The `build_timeout` property is not available on the `Lambda` compute type.
+* `build_timeout` - (Optional) Number of minutes, from 5 to 2160 (36 hours), for AWS CodeBuild to wait until timing out any related build that does not get marked as completed. The default is 60 minutes. The `build_timeout` property is not available on the `Lambda` compute type.
 * `cache` - (Optional) Configuration block. Detailed below.
 * `concurrent_build_limit` - (Optional) Specify a maximum number of concurrent builds for the project. The value specified must be greater than 0 and less than the account concurrent running builds limit.
 * `description` - (Optional) Short description of the project.
diff --git a/website/docs/r/codebuild_project.html.markdown b/website/docs/r/codebuild_project.html.markdown
index 3fa9efabe69..d6d9b314e8b 100755
--- a/website/docs/r/codebuild_project.html.markdown
+++ b/website/docs/r/codebuild_project.html.markdown
@@ -237,7 +237,7 @@ The following arguments are optional:
 
 * `badge_enabled` - (Optional) Generates a publicly-accessible URL for the projects build badge. Available as `badge_url` attribute when enabled.
 * `build_batch_config` - (Optional) Defines the batch build options for the project.
-* `build_timeout` - (Optional) Number of minutes, from 5 to 480 (8 hours), for AWS CodeBuild to wait until timing out any related build that does not get marked as completed. The default is 60 minutes. The `build_timeout` property is not available on the `Lambda` compute type.
+* `build_timeout` - (Optional) Number of minutes, from 5 to 2160 (36 hours), for AWS CodeBuild to wait until timing out any related build that does not get marked as completed. The default is 60 minutes. The `build_timeout` property is not available on the `Lambda` compute type.
 * `cache` - (Optional) Configuration block. Detailed below.
 * `concurrent_build_limit` - (Optional) Specify a maximum number of concurrent builds for the project. The value specified must be greater than 0 and less than the account concurrent running builds limit.
 * `description` - (Optional) Short description of the project.