diff --git a/src/Dev/Build.php b/src/Dev/Build.php
index 97eb2b07..ed382c7b 100644
--- a/src/Dev/Build.php
+++ b/src/Dev/Build.php
@@ -9,6 +9,7 @@
 use SilverStripe\Control\HTTPRequest;
 use SilverStripe\Core\Injector\Injector;
 use SilverStripe\Dev\DebugView;
+use SilverStripe\Dev\Deprecation;
 use SilverStripe\GraphQL\Schema\DataObject\FieldAccessor;
 use SilverStripe\GraphQL\Schema\Exception\EmptySchemaException;
 use SilverStripe\GraphQL\Schema\Exception\SchemaBuilderException;
@@ -19,6 +20,9 @@
 use SilverStripe\GraphQL\Schema\Storage\CodeGenerationStore;
 use SilverStripe\ORM\Connect\NullDatabaseException;
 
+/**
+ * @deprecated 5.3.0 Will be replaced with SilverStripe\GraphQL\Dev\SchemaBuild
+ */
 class Build extends Controller
 {
     private static $url_handlers = [
@@ -29,6 +33,18 @@ class Build extends Controller
         'build'
     ];
 
+    public function __construct()
+    {
+        parent::__construct();
+        Deprecation::withNoReplacement(function () {
+            Deprecation::notice(
+                '5.4.0',
+                'Will be replaced with SilverStripe\GraphQL\Dev\SchemaBuild',
+                Deprecation::SCOPE_CLASS
+            );
+        });
+    }
+
     /**
      * @throws SchemaBuilderException
      * @throws SchemaNotFoundException
diff --git a/src/Dev/DevelopmentAdmin.php b/src/Dev/DevelopmentAdmin.php
index d1e29cc0..f2def245 100644
--- a/src/Dev/DevelopmentAdmin.php
+++ b/src/Dev/DevelopmentAdmin.php
@@ -15,8 +15,12 @@
 use Exception;
 use Psr\Log\LoggerInterface;
 use SilverStripe\Core\Injector\Injector;
+use SilverStripe\Dev\Deprecation;
 use SilverStripe\GraphQL\Schema\Logger;
 
+/**
+ * @deprecated 5.3.0 Will be removed without equivalent functionality to replace it
+ */
 class DevelopmentAdmin extends Controller implements PermissionProvider
 {
     private static $allowed_actions = [
@@ -34,6 +38,18 @@ class DevelopmentAdmin extends Controller implements PermissionProvider
         'CAN_DEV_GRAPHQL',
     ];
 
+    public function __construct()
+    {
+        parent::__construct();
+        Deprecation::withNoReplacement(function () {
+            Deprecation::notice(
+                '5.4.0',
+                'Will be removed without equivalent functionality to replace it',
+                Deprecation::SCOPE_CLASS
+            );
+        });
+    }
+
     protected function init()
     {
         parent::init();
diff --git a/src/Extensions/DevBuildExtension.php b/src/Extensions/DevBuildExtension.php
index 40836ad2..e4d87928 100644
--- a/src/Extensions/DevBuildExtension.php
+++ b/src/Extensions/DevBuildExtension.php
@@ -6,6 +6,7 @@
 use Psr\Log\LoggerInterface;
 use SilverStripe\Core\Config\Configurable;
 use SilverStripe\Core\Injector\Injector;
+use SilverStripe\Dev\Deprecation;
 use SilverStripe\GraphQL\Dev\Build;
 use SilverStripe\GraphQL\Schema\Logger;
 use SilverStripe\ORM\DatabaseAdmin;
@@ -13,6 +14,7 @@
 
 /**
  * @extends DataExtension<DatabaseAdmin>
+ * @deprecated 5.4.0 Will be replaced with SilverStripe\GraphQL\Extensions\DbBuildExtension
  */
 class DevBuildExtension extends DataExtension
 {
@@ -23,6 +25,18 @@ class DevBuildExtension extends DataExtension
      */
     private static bool $enabled = true;
 
+    public function __construct()
+    {
+        parent::__construct();
+        Deprecation::withNoReplacement(function () {
+            Deprecation::notice(
+                '5.4.0',
+                'Will be replaced with SilverStripe\GraphQL\Extensions\DbBuildExtension',
+                Deprecation::SCOPE_CLASS
+            );
+        });
+    }
+
     public function onAfterBuild(): void
     {
         if (!static::config()->get('enabled')) {