diff --git a/packages/flutter/lib/src/widgets/layout_builder.dart b/packages/flutter/lib/src/widgets/layout_builder.dart
index 79980bb458..45e9608f59 100644
--- a/packages/flutter/lib/src/widgets/layout_builder.dart
+++ b/packages/flutter/lib/src/widgets/layout_builder.dart
@@ -302,8 +302,12 @@ class _LayoutBuilderElement<LayoutInfoType> extends RenderObjectElement {
 /// Provides a [layoutCallback] implementation which, if needed, invokes
 /// [AbstractLayoutBuilder]'s builder callback.
 ///
-/// Implementers must provide a [layoutInfo] implementation that is safe to
-/// access in [layoutCallback], which is called in [performLayout].
+/// Implementers can override the [layoutInfo] implementation with a value
+/// that is safe to access in [layoutCallback], which is called in
+/// [performLayout]. The default [layoutInfo] returns the incoming
+/// [Constraints].
+///
+/// This mixin replaces [RenderConstrainedLayoutBuilder].
 mixin RenderAbstractLayoutBuilderMixin<LayoutInfoType, ChildType extends RenderObject>
     on RenderObjectWithChildMixin<ChildType>, RenderObjectWithLayoutCallbackMixin {
   LayoutCallback<Constraints>? _callback;
@@ -334,11 +338,18 @@ mixin RenderAbstractLayoutBuilderMixin<LayoutInfoType, ChildType extends RenderO
   ///
   /// This is typically the information that are only made available in
   /// [performLayout], which is inaccessible for regular [Builder] widget,
-  /// such as the incoming [Constraints].
+  /// such as the incoming [Constraints], which are the default value.
   @protected
-  LayoutInfoType get layoutInfo;
+  LayoutInfoType get layoutInfo => constraints as LayoutInfoType;
 }
 
+/// Generic mixin for [RenderObject]s created by an [AbstractLayoutBuilder] with
+/// the the same `LayoutInfoType`.
+///
+/// Use [RenderAbstractLayoutBuilderMixin] instead, which replaces this mixin.
+typedef RenderConstrainedLayoutBuilder<LayoutInfoType, ChildType extends RenderObject> =
+    RenderAbstractLayoutBuilderMixin<LayoutInfoType, ChildType>;
+
 /// Builds a widget tree that can depend on the parent widget's size.
 ///
 /// Similar to the [Builder] widget except that the framework calls the [builder]
@@ -476,10 +487,6 @@ class _RenderLayoutBuilder extends RenderBox
 
     return true;
   }
-
-  @protected
-  @override
-  BoxConstraints get layoutInfo => constraints;
 }
 
 FlutterErrorDetails _reportException(
diff --git a/packages/flutter/lib/src/widgets/sliver_layout_builder.dart b/packages/flutter/lib/src/widgets/sliver_layout_builder.dart
index a7daaae35d..dd06fbd1ed 100644
--- a/packages/flutter/lib/src/widgets/sliver_layout_builder.dart
+++ b/packages/flutter/lib/src/widgets/sliver_layout_builder.dart
@@ -29,7 +29,7 @@ class SliverLayoutBuilder extends ConstrainedLayoutBuilder<SliverConstraints> {
   const SliverLayoutBuilder({super.key, required super.builder});
 
   @override
-  RenderAbstractLayoutBuilderMixin<SliverConstraints, RenderSliver> createRenderObject(
+  RenderConstrainedLayoutBuilder<SliverConstraints, RenderSliver> createRenderObject(
     BuildContext context,
   ) => _RenderSliverLayoutBuilder();
 }
@@ -38,17 +38,13 @@ class _RenderSliverLayoutBuilder extends RenderSliver
     with
         RenderObjectWithChildMixin<RenderSliver>,
         RenderObjectWithLayoutCallbackMixin,
-        RenderAbstractLayoutBuilderMixin<SliverConstraints, RenderSliver> {
+        RenderConstrainedLayoutBuilder<SliverConstraints, RenderSliver> {
   @override
   double childMainAxisPosition(RenderObject child) {
     assert(child == this.child);
     return 0;
   }
 
-  @protected
-  @override
-  SliverConstraints get layoutInfo => constraints;
-
   @override
   void performLayout() {
     runLayoutCallback();
diff --git a/packages/flutter/test/widgets/layout_builder_test.dart b/packages/flutter/test/widgets/layout_builder_test.dart
index e11dfd5202..2133ab111f 100644
--- a/packages/flutter/test/widgets/layout_builder_test.dart
+++ b/packages/flutter/test/widgets/layout_builder_test.dart
@@ -1067,10 +1067,6 @@ class _RenderSmartLayoutBuilder extends RenderProxyBox
       onChildWasPainted(extraOffset);
     }
   }
-
-  @protected
-  @override
-  BoxConstraints get layoutInfo => constraints;
 }
 
 class _LayoutSpy extends LeafRenderObjectWidget {