diff --git a/api/Avalonia.nupkg.xml b/api/Avalonia.nupkg.xml
index b7efaf7869..e6a73822e9 100644
--- a/api/Avalonia.nupkg.xml
+++ b/api/Avalonia.nupkg.xml
@@ -25,6 +25,60 @@
     <Left>baseline/Avalonia/lib/net10.0/Avalonia.Base.dll</Left>
     <Right>current/Avalonia/lib/net10.0/Avalonia.Base.dll</Right>
   </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:Avalonia.Data.Core.Plugins.BindingPlugins</Target>
+    <Left>baseline/Avalonia/lib/net10.0/Avalonia.Base.dll</Left>
+    <Right>current/Avalonia/lib/net10.0/Avalonia.Base.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:Avalonia.Data.Core.Plugins.DataValidationBase</Target>
+    <Left>baseline/Avalonia/lib/net10.0/Avalonia.Base.dll</Left>
+    <Right>current/Avalonia/lib/net10.0/Avalonia.Base.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:Avalonia.Data.Core.Plugins.ExceptionValidationPlugin</Target>
+    <Left>baseline/Avalonia/lib/net10.0/Avalonia.Base.dll</Left>
+    <Right>current/Avalonia/lib/net10.0/Avalonia.Base.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:Avalonia.Data.Core.Plugins.IDataValidationPlugin</Target>
+    <Left>baseline/Avalonia/lib/net10.0/Avalonia.Base.dll</Left>
+    <Right>current/Avalonia/lib/net10.0/Avalonia.Base.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:Avalonia.Data.Core.Plugins.IndeiValidationPlugin</Target>
+    <Left>baseline/Avalonia/lib/net10.0/Avalonia.Base.dll</Left>
+    <Right>current/Avalonia/lib/net10.0/Avalonia.Base.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:Avalonia.Data.Core.Plugins.IPropertyAccessorPlugin</Target>
+    <Left>baseline/Avalonia/lib/net10.0/Avalonia.Base.dll</Left>
+    <Right>current/Avalonia/lib/net10.0/Avalonia.Base.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:Avalonia.Data.Core.Plugins.IStreamPlugin</Target>
+    <Left>baseline/Avalonia/lib/net10.0/Avalonia.Base.dll</Left>
+    <Right>current/Avalonia/lib/net10.0/Avalonia.Base.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:Avalonia.Data.Core.Plugins.PropertyAccessorBase</Target>
+    <Left>baseline/Avalonia/lib/net10.0/Avalonia.Base.dll</Left>
+    <Right>current/Avalonia/lib/net10.0/Avalonia.Base.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:Avalonia.Data.Core.Plugins.PropertyError</Target>
+    <Left>baseline/Avalonia/lib/net10.0/Avalonia.Base.dll</Left>
+    <Right>current/Avalonia/lib/net10.0/Avalonia.Base.dll</Right>
+  </Suppression>
   <Suppression>
     <DiagnosticId>CP0001</DiagnosticId>
     <Target>T:Avalonia.Diagnostics.AppliedStyle</Target>
@@ -253,6 +307,60 @@
     <Left>baseline/Avalonia/lib/net8.0/Avalonia.Base.dll</Left>
     <Right>current/Avalonia/lib/net8.0/Avalonia.Base.dll</Right>
   </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:Avalonia.Data.Core.Plugins.BindingPlugins</Target>
+    <Left>baseline/Avalonia/lib/net8.0/Avalonia.Base.dll</Left>
+    <Right>current/Avalonia/lib/net8.0/Avalonia.Base.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:Avalonia.Data.Core.Plugins.DataValidationBase</Target>
+    <Left>baseline/Avalonia/lib/net8.0/Avalonia.Base.dll</Left>
+    <Right>current/Avalonia/lib/net8.0/Avalonia.Base.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:Avalonia.Data.Core.Plugins.ExceptionValidationPlugin</Target>
+    <Left>baseline/Avalonia/lib/net8.0/Avalonia.Base.dll</Left>
+    <Right>current/Avalonia/lib/net8.0/Avalonia.Base.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:Avalonia.Data.Core.Plugins.IDataValidationPlugin</Target>
+    <Left>baseline/Avalonia/lib/net8.0/Avalonia.Base.dll</Left>
+    <Right>current/Avalonia/lib/net8.0/Avalonia.Base.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:Avalonia.Data.Core.Plugins.IndeiValidationPlugin</Target>
+    <Left>baseline/Avalonia/lib/net8.0/Avalonia.Base.dll</Left>
+    <Right>current/Avalonia/lib/net8.0/Avalonia.Base.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:Avalonia.Data.Core.Plugins.IPropertyAccessorPlugin</Target>
+    <Left>baseline/Avalonia/lib/net8.0/Avalonia.Base.dll</Left>
+    <Right>current/Avalonia/lib/net8.0/Avalonia.Base.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:Avalonia.Data.Core.Plugins.IStreamPlugin</Target>
+    <Left>baseline/Avalonia/lib/net8.0/Avalonia.Base.dll</Left>
+    <Right>current/Avalonia/lib/net8.0/Avalonia.Base.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:Avalonia.Data.Core.Plugins.PropertyAccessorBase</Target>
+    <Left>baseline/Avalonia/lib/net8.0/Avalonia.Base.dll</Left>
+    <Right>current/Avalonia/lib/net8.0/Avalonia.Base.dll</Right>
+  </Suppression>
+  <Suppression>
+    <DiagnosticId>CP0001</DiagnosticId>
+    <Target>T:Avalonia.Data.Core.Plugins.PropertyError</Target>
+    <Left>baseline/Avalonia/lib/net8.0/Avalonia.Base.dll</Left>
+    <Right>current/Avalonia/lib/net8.0/Avalonia.Base.dll</Right>
+  </Suppression>
   <Suppression>
     <DiagnosticId>CP0001</DiagnosticId>
     <Target>T:Avalonia.Diagnostics.AppliedStyle</Target>
diff --git a/src/Avalonia.Base/Data/Core/Plugins/BindingPlugins.cs b/src/Avalonia.Base/Data/Core/Plugins/BindingPlugins.cs
index 520c345ad5..50e137eac1 100644
--- a/src/Avalonia.Base/Data/Core/Plugins/BindingPlugins.cs
+++ b/src/Avalonia.Base/Data/Core/Plugins/BindingPlugins.cs
@@ -7,7 +7,7 @@ namespace Avalonia.Data.Core.Plugins
     /// Holds a registry of plugins used for bindings.
     /// </summary>
     [RequiresUnreferencedCode(TrimmingMessages.PropertyAccessorsRequiresUnreferencedCodeMessage)]
-    public static class BindingPlugins
+    internal static class BindingPlugins
     {
         internal static readonly List<IPropertyAccessorPlugin> s_propertyAccessors = new()
         {
@@ -17,7 +17,6 @@ namespace Avalonia.Data.Core.Plugins
 
         internal static readonly List<IDataValidationPlugin> s_dataValidators = new()
         {
-            new DataAnnotationsValidationPlugin(),
             new IndeiValidationPlugin(),
             new ExceptionValidationPlugin(),
         };
diff --git a/src/Avalonia.Base/Data/Core/Plugins/DataValidationBase.cs b/src/Avalonia.Base/Data/Core/Plugins/DataValidationBase.cs
index 6bef9f69f6..85ebf6ff78 100644
--- a/src/Avalonia.Base/Data/Core/Plugins/DataValidationBase.cs
+++ b/src/Avalonia.Base/Data/Core/Plugins/DataValidationBase.cs
@@ -11,7 +11,7 @@ namespace Avalonia.Data.Core.Plugins
     /// and convert any values received from the inner property accessor into
     /// <see cref="BindingNotification"/>s.
     /// </remarks>
-    public abstract class DataValidationBase : PropertyAccessorBase, IObserver<object?>
+    internal abstract class DataValidationBase : PropertyAccessorBase, IObserver<object?>
     {
         private readonly IPropertyAccessor _inner;
 
diff --git a/src/Avalonia.Base/Data/Core/Plugins/ExceptionValidationPlugin.cs b/src/Avalonia.Base/Data/Core/Plugins/ExceptionValidationPlugin.cs
index 899b542f80..25c77e3282 100644
--- a/src/Avalonia.Base/Data/Core/Plugins/ExceptionValidationPlugin.cs
+++ b/src/Avalonia.Base/Data/Core/Plugins/ExceptionValidationPlugin.cs
@@ -7,7 +7,7 @@ namespace Avalonia.Data.Core.Plugins
     /// <summary>
     /// Validates properties that report errors by throwing exceptions.
     /// </summary>
-    public class ExceptionValidationPlugin : IDataValidationPlugin
+    internal class ExceptionValidationPlugin : IDataValidationPlugin
     {
         /// <inheritdoc/>
         public bool Match(WeakReference<object?> reference, string memberName) => true;
diff --git a/src/Avalonia.Base/Data/Core/Plugins/IDataValidationPlugin.cs b/src/Avalonia.Base/Data/Core/Plugins/IDataValidationPlugin.cs
index 5d2f06d2c6..339c8a656d 100644
--- a/src/Avalonia.Base/Data/Core/Plugins/IDataValidationPlugin.cs
+++ b/src/Avalonia.Base/Data/Core/Plugins/IDataValidationPlugin.cs
@@ -5,7 +5,7 @@ namespace Avalonia.Data.Core.Plugins
     /// <summary>
     /// Defines how data validation is observed by an <see cref="BindingExpression"/>.
     /// </summary>
-    public interface IDataValidationPlugin
+    internal interface IDataValidationPlugin
     {
         /// <summary>
         /// Checks whether this plugin can handle data validation on the specified object.
diff --git a/src/Avalonia.Base/Data/Core/Plugins/IPropertyAccessor.cs b/src/Avalonia.Base/Data/Core/Plugins/IPropertyAccessor.cs
index 8941e86598..8db19bbffa 100644
--- a/src/Avalonia.Base/Data/Core/Plugins/IPropertyAccessor.cs
+++ b/src/Avalonia.Base/Data/Core/Plugins/IPropertyAccessor.cs
@@ -3,8 +3,7 @@ using System;
 namespace Avalonia.Data.Core.Plugins
 {
     /// <summary>
-    /// Defines an accessor to a property on an object returned by a 
-    /// <see cref="IPropertyAccessorPlugin"/>
+    /// Defines an accessor to a property on an object.
     /// </summary>
     public interface IPropertyAccessor : IDisposable
     {
diff --git a/src/Avalonia.Base/Data/Core/Plugins/IPropertyAccessorPlugin.cs b/src/Avalonia.Base/Data/Core/Plugins/IPropertyAccessorPlugin.cs
index e2d7312ac4..fb24969c7e 100644
--- a/src/Avalonia.Base/Data/Core/Plugins/IPropertyAccessorPlugin.cs
+++ b/src/Avalonia.Base/Data/Core/Plugins/IPropertyAccessorPlugin.cs
@@ -5,7 +5,7 @@ namespace Avalonia.Data.Core.Plugins
     /// <summary>
     /// Defines how a member is read, written and observed by a binding.
     /// </summary>
-    public interface IPropertyAccessorPlugin
+    internal interface IPropertyAccessorPlugin
     {
         /// <summary>
         /// Checks whether this plugin can handle accessing the properties of the specified object.
diff --git a/src/Avalonia.Base/Data/Core/Plugins/IStreamPlugin.cs b/src/Avalonia.Base/Data/Core/Plugins/IStreamPlugin.cs
index b741cfaca2..da86543507 100644
--- a/src/Avalonia.Base/Data/Core/Plugins/IStreamPlugin.cs
+++ b/src/Avalonia.Base/Data/Core/Plugins/IStreamPlugin.cs
@@ -5,7 +5,7 @@ namespace Avalonia.Data.Core.Plugins
     /// <summary>
     /// Defines a plugin that handles the '^' stream binding operator.
     /// </summary>
-    public interface IStreamPlugin
+    internal interface IStreamPlugin
     {
         /// <summary>
         /// Checks whether this plugin handles the specified value.
diff --git a/src/Avalonia.Base/Data/Core/Plugins/IndeiValidationPlugin.cs b/src/Avalonia.Base/Data/Core/Plugins/IndeiValidationPlugin.cs
index 385d96a7b8..a06514b5da 100644
--- a/src/Avalonia.Base/Data/Core/Plugins/IndeiValidationPlugin.cs
+++ b/src/Avalonia.Base/Data/Core/Plugins/IndeiValidationPlugin.cs
@@ -9,7 +9,7 @@ namespace Avalonia.Data.Core.Plugins
     /// <summary>
     /// Validates properties on objects that implement <see cref="INotifyDataErrorInfo"/>.
     /// </summary>
-    public class IndeiValidationPlugin : IDataValidationPlugin
+    internal class IndeiValidationPlugin : IDataValidationPlugin
     {
         private static readonly WeakEvent<INotifyDataErrorInfo, DataErrorsChangedEventArgs>
             ErrorsChangedWeakEvent = WeakEvent.Register<INotifyDataErrorInfo, DataErrorsChangedEventArgs>(
diff --git a/src/Avalonia.Base/Data/Core/Plugins/PropertyAccessorBase.cs b/src/Avalonia.Base/Data/Core/Plugins/PropertyAccessorBase.cs
index df36347e93..ad4e46ca08 100644
--- a/src/Avalonia.Base/Data/Core/Plugins/PropertyAccessorBase.cs
+++ b/src/Avalonia.Base/Data/Core/Plugins/PropertyAccessorBase.cs
@@ -5,7 +5,7 @@ namespace Avalonia.Data.Core.Plugins
     /// <summary>
     /// Defines a default base implementation for a <see cref="IPropertyAccessor"/>.
     /// </summary>
-    public abstract class PropertyAccessorBase : IPropertyAccessor
+    internal abstract class PropertyAccessorBase : IPropertyAccessor
     {
         private Action<object?>? _listener;
 
diff --git a/src/Avalonia.Base/Data/Core/Plugins/PropertyError.cs b/src/Avalonia.Base/Data/Core/Plugins/PropertyError.cs
index 7143a4269a..dae52e8541 100644
--- a/src/Avalonia.Base/Data/Core/Plugins/PropertyError.cs
+++ b/src/Avalonia.Base/Data/Core/Plugins/PropertyError.cs
@@ -5,7 +5,7 @@ namespace Avalonia.Data.Core.Plugins
     /// <summary>
     /// An <see cref="IPropertyAccessor"/> that represents an error.
     /// </summary>
-    public class PropertyError : IPropertyAccessor
+    internal class PropertyError : IPropertyAccessor
     {
         private readonly BindingNotification _error;
 
diff --git a/src/Avalonia.Controls/AppBuilder.cs b/src/Avalonia.Controls/AppBuilder.cs
index 9d6bcff813..9259be8594 100644
--- a/src/Avalonia.Controls/AppBuilder.cs
+++ b/src/Avalonia.Controls/AppBuilder.cs
@@ -1,10 +1,12 @@
 using System;
 using System.Diagnostics.CodeAnalysis;
+using System.Linq;
 using System.Reflection;
 using Avalonia.Controls.ApplicationLifetimes;
 using Avalonia.Platform;
 using Avalonia.Media;
 using Avalonia.Metadata;
+using Avalonia.Data.Core.Plugins;
 
 namespace Avalonia
 {
@@ -265,6 +267,17 @@ namespace Avalonia
             return Self;
         }
 
+        /// <summary>
+        /// Adds support for validation using <c>System.ComponentModel.DataAnnotations</c>.
+        /// </summary>
+        [RequiresUnreferencedCode(TrimmingMessages.PropertyAccessorsRequiresUnreferencedCodeMessage)]
+        public AppBuilder WithDataAnnotationsValidation()
+        {
+            if (!BindingPlugins.DataValidators.Any(x => x is DataAnnotationsValidationPlugin))
+                BindingPlugins.DataValidators.Insert(0, new DataAnnotationsValidationPlugin());
+            return Self;
+        }
+
         /// <summary>
         /// Registers an action that is executed with the current font manager.
         /// </summary>
diff --git a/tests/Avalonia.Base.UnitTests/Data/Core/BindingExpressionTests.DataValidation.cs b/tests/Avalonia.Base.UnitTests/Data/Core/BindingExpressionTests.DataValidation.cs
index 8dd75fedf0..04aa7b8de2 100644
--- a/tests/Avalonia.Base.UnitTests/Data/Core/BindingExpressionTests.DataValidation.cs
+++ b/tests/Avalonia.Base.UnitTests/Data/Core/BindingExpressionTests.DataValidation.cs
@@ -2,7 +2,9 @@
 using System.Collections;
 using System.Collections.Generic;
 using System.ComponentModel.DataAnnotations;
+using System.Linq;
 using Avalonia.Data;
+using Avalonia.Data.Core.Plugins;
 using Avalonia.UnitTests;
 using Xunit;
 
@@ -273,6 +275,9 @@ public partial class BindingExpressionTests
     [Fact]
     public void Updates_Data_Validation_For_Required_DataAnnotation()
     {
+        if (!BindingPlugins.DataValidators.Any(x => x is DataAnnotationsValidationPlugin))
+            BindingPlugins.DataValidators.Insert(0, new DataAnnotationsValidationPlugin());
+
         var data = new DataAnnotationsViewModel();
         var target = CreateTargetWithSource(
             data,