diff --git a/pkg/front_end/lib/src/base/scope.dart b/pkg/front_end/lib/src/base/scope.dart
index 80fb3e98dde1..79718eed1495 100644
--- a/pkg/front_end/lib/src/base/scope.dart
+++ b/pkg/front_end/lib/src/base/scope.dart
@@ -746,8 +746,8 @@ mixin ErroneousMemberBuilderMixin implements SourceMemberBuilder {
 
   @override
   // Coverage-ignore(suite): Not run.
-  void checkTypes(
-      SourceLibraryBuilder library, TypeEnvironment typeEnvironment) {
+  void checkTypes(SourceLibraryBuilder library, NameSpace nameSpace,
+      TypeEnvironment typeEnvironment) {
     assert(false, "Unexpected call to $runtimeType.checkVariance.");
   }
 
diff --git a/pkg/front_end/lib/src/source/source_builder_mixins.dart b/pkg/front_end/lib/src/source/source_builder_mixins.dart
index 921d49f9fcb4..cd25fde5189c 100644
--- a/pkg/front_end/lib/src/source/source_builder_mixins.dart
+++ b/pkg/front_end/lib/src/source/source_builder_mixins.dart
@@ -14,17 +14,13 @@ import '../builder/builder_mixins.dart';
 import '../builder/declaration_builders.dart';
 import '../builder/library_builder.dart';
 import '../builder/member_builder.dart';
-import '../builder/procedure_builder.dart';
 import '../builder/type_builder.dart';
 import '../kernel/body_builder_context.dart';
 import '../kernel/kernel_helper.dart';
 import '../kernel/type_algorithms.dart';
-import 'source_constructor_builder.dart';
-import 'source_field_builder.dart';
 import 'source_library_builder.dart';
 import 'source_loader.dart';
 import 'source_member_builder.dart';
-import 'source_procedure_builder.dart';
 
 abstract class SourceDeclarationBuilder implements IDeclarationBuilder {
   void buildScopes(LibraryBuilder coreLibrary);
@@ -155,30 +151,13 @@ mixin SourceDeclarationBuilderMixin
 
   void checkTypesInOutline(TypeEnvironment typeEnvironment) {
     forEach((String name, Builder builder) {
-      if (builder is SourceFieldBuilder) {
-        // Check fields.
-        libraryBuilder.checkTypesInField(builder, typeEnvironment);
-      } else if (builder is SourceProcedureBuilder) {
-        // Check procedures
-        libraryBuilder.checkTypesInFunctionBuilder(builder, typeEnvironment);
-        if (builder.isGetter) {
-          Builder? setterDeclaration =
-              nameSpace.lookupLocalMember(builder.name, setter: true);
-          if (setterDeclaration != null) {
-            libraryBuilder.checkGetterSetterTypes(builder,
-                setterDeclaration as ProcedureBuilder, typeEnvironment);
-          }
-        }
-      } else {
-        // Coverage-ignore-block(suite): Not run.
-        assert(false, "Unexpected member: $builder.");
-      }
+      (builder as SourceMemberBuilder)
+          .checkTypes(libraryBuilder, nameSpace, typeEnvironment);
     });
 
     nameSpace.forEachConstructor((String name, MemberBuilder builder) {
-      if (builder is SourceConstructorBuilder) {
-        builder.checkTypes(libraryBuilder, typeEnvironment);
-      }
+      (builder as SourceMemberBuilder)
+          .checkTypes(libraryBuilder, nameSpace, typeEnvironment);
     });
   }
 
diff --git a/pkg/front_end/lib/src/source/source_class_builder.dart b/pkg/front_end/lib/src/source/source_class_builder.dart
index f475e4288eec..e625fa609e44 100644
--- a/pkg/front_end/lib/src/source/source_class_builder.dart
+++ b/pkg/front_end/lib/src/source/source_class_builder.dart
@@ -1152,14 +1152,14 @@ class SourceClassBuilder extends ClassBuilderImpl
     while (memberIterator.moveNext()) {
       SourceMemberBuilder builder = memberIterator.current;
       builder.checkVariance(this, typeEnvironment);
-      builder.checkTypes(libraryBuilder, typeEnvironment);
+      builder.checkTypes(libraryBuilder, nameSpace, typeEnvironment);
     }
 
     Iterator<SourceMemberBuilder> constructorIterator =
         fullConstructorIterator<SourceMemberBuilder>();
     while (constructorIterator.moveNext()) {
       SourceMemberBuilder builder = constructorIterator.current;
-      builder.checkTypes(libraryBuilder, typeEnvironment);
+      builder.checkTypes(libraryBuilder, nameSpace, typeEnvironment);
     }
   }
 
diff --git a/pkg/front_end/lib/src/source/source_constructor_builder.dart b/pkg/front_end/lib/src/source/source_constructor_builder.dart
index 7a0efd0b1589..3fcd75492b26 100644
--- a/pkg/front_end/lib/src/source/source_constructor_builder.dart
+++ b/pkg/front_end/lib/src/source/source_constructor_builder.dart
@@ -21,6 +21,7 @@ import '../base/messages.dart'
         messageSuperInitializerNotLast,
         noLength;
 import '../base/modifiers.dart';
+import '../base/name_space.dart';
 import '../base/scope.dart';
 import '../builder/builder.dart';
 import '../builder/constructor_builder.dart';
@@ -362,8 +363,8 @@ abstract class AbstractSourceConstructorBuilder
       SourceClassBuilder sourceClassBuilder, TypeEnvironment typeEnvironment) {}
 
   @override
-  void checkTypes(
-      SourceLibraryBuilder library, TypeEnvironment typeEnvironment) {
+  void checkTypes(SourceLibraryBuilder library, NameSpace nameSpace,
+      TypeEnvironment typeEnvironment) {
     library.checkTypesInConstructorBuilder(this, formals, typeEnvironment);
   }
 
@@ -986,13 +987,13 @@ class DeclaredSourceConstructorBuilder
   }
 
   @override
-  void checkTypes(
-      SourceLibraryBuilder library, TypeEnvironment typeEnvironment) {
-    super.checkTypes(library, typeEnvironment);
+  void checkTypes(SourceLibraryBuilder library, NameSpace nameSpace,
+      TypeEnvironment typeEnvironment) {
+    super.checkTypes(library, nameSpace, typeEnvironment);
     List<DeclaredSourceConstructorBuilder>? augmentations = _augmentations;
     if (augmentations != null) {
       for (DeclaredSourceConstructorBuilder augmentation in augmentations) {
-        augmentation.checkTypes(library, typeEnvironment);
+        augmentation.checkTypes(library, nameSpace, typeEnvironment);
       }
     }
   }
@@ -1214,8 +1215,8 @@ class SyntheticSourceConstructorBuilder extends MemberBuilderImpl
       SourceClassBuilder sourceClassBuilder, TypeEnvironment typeEnvironment) {}
 
   @override
-  void checkTypes(
-      SourceLibraryBuilder library, TypeEnvironment typeEnvironment) {}
+  void checkTypes(SourceLibraryBuilder library, NameSpace nameSpace,
+      TypeEnvironment typeEnvironment) {}
 }
 
 class SourceExtensionTypeConstructorBuilder
diff --git a/pkg/front_end/lib/src/source/source_factory_builder.dart b/pkg/front_end/lib/src/source/source_factory_builder.dart
index 279803da56f0..3fc719abb4e5 100644
--- a/pkg/front_end/lib/src/source/source_factory_builder.dart
+++ b/pkg/front_end/lib/src/source/source_factory_builder.dart
@@ -16,6 +16,7 @@ import '../base/messages.dart'
         templateRedirectingFactoryIncompatibleTypeArgument,
         templateTypeArgumentMismatch;
 import '../base/modifiers.dart';
+import '../base/name_space.dart';
 import '../base/problems.dart' show unexpected, unhandled;
 import '../base/scope.dart';
 import '../builder/builder.dart';
@@ -318,13 +319,13 @@ class SourceFactoryBuilder extends SourceFunctionBuilderImpl {
       SourceClassBuilder sourceClassBuilder, TypeEnvironment typeEnvironment) {}
 
   @override
-  void checkTypes(
-      SourceLibraryBuilder library, TypeEnvironment typeEnvironment) {
+  void checkTypes(SourceLibraryBuilder library, NameSpace nameSpace,
+      TypeEnvironment typeEnvironment) {
     library.checkTypesInFunctionBuilder(this, typeEnvironment);
     List<SourceFactoryBuilder>? augmentations = _augmentations;
     if (augmentations != null) {
       for (SourceFactoryBuilder augmentation in augmentations) {
-        augmentation.checkTypes(library, typeEnvironment);
+        augmentation.checkTypes(library, nameSpace, typeEnvironment);
       }
     }
   }
@@ -655,8 +656,8 @@ class RedirectingFactoryBuilder extends SourceFactoryBuilder {
       SourceClassBuilder sourceClassBuilder, TypeEnvironment typeEnvironment) {}
 
   @override
-  void checkTypes(
-      SourceLibraryBuilder library, TypeEnvironment typeEnvironment) {
+  void checkTypes(SourceLibraryBuilder library, NameSpace nameSpace,
+      TypeEnvironment typeEnvironment) {
     library.checkTypesInRedirectingFactoryBuilder(this, typeEnvironment);
   }
 
diff --git a/pkg/front_end/lib/src/source/source_field_builder.dart b/pkg/front_end/lib/src/source/source_field_builder.dart
index 660825c240ae..1af0b9865adf 100644
--- a/pkg/front_end/lib/src/source/source_field_builder.dart
+++ b/pkg/front_end/lib/src/source/source_field_builder.dart
@@ -2,8 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-import 'package:_fe_analyzer_shared/src/scanner/scanner.dart' show Token;
 import 'package:_fe_analyzer_shared/src/metadata/expressions.dart' as shared;
+import 'package:_fe_analyzer_shared/src/scanner/scanner.dart' show Token;
 import 'package:kernel/ast.dart';
 import 'package:kernel/class_hierarchy.dart';
 import 'package:kernel/core_types.dart';
@@ -13,6 +13,7 @@ import 'package:kernel/type_environment.dart';
 import '../api_prototype/lowering_predicates.dart';
 import '../base/constant_context.dart' show ConstantContext;
 import '../base/modifiers.dart' show Modifiers;
+import '../base/name_space.dart';
 import '../base/problems.dart' show internalProblem;
 import '../base/scope.dart' show LookupScope;
 import '../builder/builder.dart';
@@ -652,8 +653,8 @@ class SourceFieldBuilder extends SourceMemberBuilderImpl
   }
 
   @override
-  void checkTypes(
-      SourceLibraryBuilder library, TypeEnvironment typeEnvironment) {
+  void checkTypes(SourceLibraryBuilder library, NameSpace nameSpace,
+      TypeEnvironment typeEnvironment) {
     library.checkTypesInField(this, typeEnvironment);
   }
 
diff --git a/pkg/front_end/lib/src/source/source_library_builder.dart b/pkg/front_end/lib/src/source/source_library_builder.dart
index e29091978250..c07e61e580a2 100644
--- a/pkg/front_end/lib/src/source/source_library_builder.dart
+++ b/pkg/front_end/lib/src/source/source_library_builder.dart
@@ -2009,22 +2009,8 @@ class SourceLibraryBuilder extends LibraryBuilderImpl {
     Iterator<Builder> iterator = localMembersIterator;
     while (iterator.moveNext()) {
       Builder declaration = iterator.current;
-      if (declaration is SourceFieldBuilder) {
-        declaration.checkTypes(this, typeEnvironment);
-      } else if (declaration is SourceProcedureBuilder) {
-        List<TypeParameterBuilder>? typeParameters = declaration.typeParameters;
-        if (typeParameters != null && typeParameters.isNotEmpty) {
-          checkTypeParameterDependencies(typeParameters);
-        }
-        declaration.checkTypes(this, typeEnvironment);
-        if (declaration.isGetter) {
-          Builder? setterDeclaration = libraryNameSpace
-              .lookupLocalMember(declaration.name, setter: true);
-          if (setterDeclaration != null) {
-            checkGetterSetterTypes(declaration,
-                setterDeclaration as ProcedureBuilder, typeEnvironment);
-          }
-        }
+      if (declaration is SourceMemberBuilder) {
+        declaration.checkTypes(this, libraryNameSpace, typeEnvironment);
       } else if (declaration is SourceClassBuilder) {
         List<TypeParameterBuilder>? typeParameters = declaration.typeParameters;
         if (typeParameters != null && typeParameters.isNotEmpty) {
diff --git a/pkg/front_end/lib/src/source/source_member_builder.dart b/pkg/front_end/lib/src/source/source_member_builder.dart
index 7c2f00709890..a9cd710c6621 100644
--- a/pkg/front_end/lib/src/source/source_member_builder.dart
+++ b/pkg/front_end/lib/src/source/source_member_builder.dart
@@ -7,6 +7,7 @@ import 'package:kernel/class_hierarchy.dart';
 import 'package:kernel/type_environment.dart';
 
 import '../base/common.dart';
+import '../base/name_space.dart';
 import '../base/problems.dart' show unsupported;
 import '../builder/member_builder.dart';
 import '../builder/metadata_builder.dart';
@@ -49,8 +50,8 @@ abstract class SourceMemberBuilder implements MemberBuilder {
       SourceClassBuilder sourceClassBuilder, TypeEnvironment typeEnvironment);
 
   /// Checks the signature types of this member.
-  void checkTypes(
-      SourceLibraryBuilder library, TypeEnvironment typeEnvironment);
+  void checkTypes(SourceLibraryBuilder library, NameSpace nameSpace,
+      TypeEnvironment typeEnvironment);
 
   /// Returns `true` if this member is declared using the `augment` modifier.
   bool get isAugmentation;
diff --git a/pkg/front_end/lib/src/source/source_procedure_builder.dart b/pkg/front_end/lib/src/source/source_procedure_builder.dart
index 4092ffd8a911..252014a6676f 100644
--- a/pkg/front_end/lib/src/source/source_procedure_builder.dart
+++ b/pkg/front_end/lib/src/source/source_procedure_builder.dart
@@ -7,6 +7,7 @@ import 'package:kernel/type_algebra.dart';
 import 'package:kernel/type_environment.dart';
 
 import '../base/modifiers.dart';
+import '../base/name_space.dart';
 import '../builder/builder.dart';
 import '../builder/declaration_builders.dart';
 import '../builder/formal_parameter_builder.dart';
@@ -672,13 +673,29 @@ class SourceProcedureBuilder extends SourceFunctionBuilderImpl
   }
 
   @override
-  void checkTypes(
-      SourceLibraryBuilder library, TypeEnvironment typeEnvironment) {
-    library.checkTypesInFunctionBuilder(this, typeEnvironment);
+  void checkTypes(SourceLibraryBuilder libraryBuilder, NameSpace nameSpace,
+      TypeEnvironment typeEnvironment) {
+    List<TypeParameterBuilder>? typeParameters = this.typeParameters;
+    if (typeParameters != null && typeParameters.isNotEmpty) {
+      libraryBuilder.checkTypeParameterDependencies(typeParameters);
+    }
+    libraryBuilder.checkTypesInFunctionBuilder(this, typeEnvironment);
     List<SourceProcedureBuilder>? augmentations = _augmentations;
     if (augmentations != null) {
       for (SourceProcedureBuilder augmentation in augmentations) {
-        augmentation.checkTypes(library, typeEnvironment);
+        augmentation.checkTypes(libraryBuilder, nameSpace, typeEnvironment);
+      }
+    }
+    if (isGetter) {
+      if (!isClassMember) {
+        // Getter/setter type conflict for class members is handled in the class
+        // hierarchy builder.
+        Builder? setterDeclaration =
+            nameSpace.lookupLocalMember(name, setter: true);
+        if (setterDeclaration != null) {
+          libraryBuilder.checkGetterSetterTypes(
+              this, setterDeclaration as ProcedureBuilder, typeEnvironment);
+        }
       }
     }
   }