diff --git a/dotnet/src/webdriver/BiDi/Extensions/Permissions/PermissionsBiDi.cs b/dotnet/src/webdriver/BiDi/Extensions/Permissions/PermissionsBiDi.cs
new file mode 100644
index 0000000000000..c70ed1812c91b
--- /dev/null
+++ b/dotnet/src/webdriver/BiDi/Extensions/Permissions/PermissionsBiDi.cs
@@ -0,0 +1,45 @@
+// <copyright file="PermissionsBiDi.cs" company="Selenium Committers">
+// Licensed to the Software Freedom Conservancy (SFC) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The SFC licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+// </copyright>
+
+using OpenQA.Selenium.BiDi.Communication;
+using System;
+using System.Threading.Tasks;
+
+namespace OpenQA.Selenium.BiDi.Extensions.Permissions;
+
+public class PermissionsBiDi : BiDi
+{
+    private readonly Lazy<PermissionsModule> _permissionsModule;
+
+    public PermissionsModule Permissions => _permissionsModule.Value;
+
+    private PermissionsBiDi(string url)
+        : base(url)
+    {
+        Broker.ProvideCustomSerializationContext(PermissionsModule.SerializerContext);
+        _permissionsModule = new Lazy<PermissionsModule>(() => new PermissionsModule(Broker));
+    }
+
+    public static async Task<PermissionsBiDi> ConnectAsync(string webSocketUrl)
+    {
+        var bidi = new PermissionsBiDi(webSocketUrl);
+        await bidi.Broker.ConnectAsync();
+        return bidi;
+    }
+}
diff --git a/dotnet/src/webdriver/BiDi/Extensions/Permissions/PermissionsBiDiJsonSerializerContext.cs b/dotnet/src/webdriver/BiDi/Extensions/Permissions/PermissionsBiDiJsonSerializerContext.cs
new file mode 100644
index 0000000000000..45aa7fb66d809
--- /dev/null
+++ b/dotnet/src/webdriver/BiDi/Extensions/Permissions/PermissionsBiDiJsonSerializerContext.cs
@@ -0,0 +1,25 @@
+// <copyright file="PermissionsBiDiJsonSerializerContext.cs" company="Selenium Committers">
+// Licensed to the Software Freedom Conservancy (SFC) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The SFC licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+// </copyright>
+
+using System.Text.Json.Serialization;
+
+namespace OpenQA.Selenium.BiDi.Extensions.Permissions;
+
+[JsonSerializable(typeof(SetPermissionCommand), TypeInfoPropertyName = "Permissions_SetPermissionCommand")]
+internal partial class PermissionsBiDiJsonSerializerContext : JsonSerializerContext;
diff --git a/dotnet/src/webdriver/BiDi/Extensions/Permissions/PermissionsExtensions.cs b/dotnet/src/webdriver/BiDi/Extensions/Permissions/PermissionsExtensions.cs
new file mode 100644
index 0000000000000..ee09601f11af5
--- /dev/null
+++ b/dotnet/src/webdriver/BiDi/Extensions/Permissions/PermissionsExtensions.cs
@@ -0,0 +1,44 @@
+// <copyright file="PermissionsExtensions.cs" company="Selenium Committers">
+// Licensed to the Software Freedom Conservancy (SFC) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The SFC licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+// </copyright>
+
+using System;
+using System.Threading.Tasks;
+
+namespace OpenQA.Selenium.BiDi.Extensions.Permissions;
+
+public static class PermissionsExtensions
+{
+    public static async Task<PermissionsBiDi> AsBiDiPermissionsAsync(this IWebDriver webDriver)
+    {
+        if (webDriver is null) throw new ArgumentNullException(nameof(webDriver));
+
+        string? webSocketUrl = null;
+
+        if (webDriver is IHasCapabilities hasCapabilities)
+        {
+            webSocketUrl = hasCapabilities.Capabilities.GetCapability("webSocketUrl")?.ToString();
+        }
+
+        if (webSocketUrl is null) throw new BiDiException("The driver is not compatible with bidirectional protocol or \"webSocketUrl\" not enabled in driver options.");
+
+        var bidi = await PermissionsBiDi.ConnectAsync(webSocketUrl).ConfigureAwait(false);
+
+        return bidi;
+    }
+}
diff --git a/dotnet/src/webdriver/BiDi/Extensions/Permissions/PermissionsModule.cs b/dotnet/src/webdriver/BiDi/Extensions/Permissions/PermissionsModule.cs
new file mode 100644
index 0000000000000..3a7c81021f6fe
--- /dev/null
+++ b/dotnet/src/webdriver/BiDi/Extensions/Permissions/PermissionsModule.cs
@@ -0,0 +1,38 @@
+// <copyright file="PermissionsModule.cs" company="Selenium Committers">
+// Licensed to the Software Freedom Conservancy (SFC) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The SFC licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+// </copyright>
+
+using OpenQA.Selenium.BiDi.Communication;
+using OpenQA.Selenium.BiDi.Modules;
+using OpenQA.Selenium.BiDi.Modules.Browser;
+using System.Text.Json.Serialization;
+using System.Threading.Tasks;
+
+namespace OpenQA.Selenium.BiDi.Extensions.Permissions;
+
+public class PermissionsModule(Broker broker) : Module(broker)
+{
+    public static JsonSerializerContext SerializerContext => PermissionsBiDiJsonSerializerContext.Default;
+
+    public async Task SetPermissionAsync(string permissionName, PermissionState state, string origin, UserContext? userContext, SetPermissionOptions? options = null)
+    {
+        var @params = new SetPermissionCommandParameters(new PermissionDescriptor(permissionName), state, origin, userContext);
+
+        await Broker.ExecuteCommandAsync(new SetPermissionCommand(@params), options).ConfigureAwait(false);
+    }
+}
diff --git a/dotnet/src/webdriver/BiDi/Extensions/Permissions/SetPermissionCommand.cs b/dotnet/src/webdriver/BiDi/Extensions/Permissions/SetPermissionCommand.cs
new file mode 100644
index 0000000000000..2bff4df15220b
--- /dev/null
+++ b/dotnet/src/webdriver/BiDi/Extensions/Permissions/SetPermissionCommand.cs
@@ -0,0 +1,39 @@
+// <copyright file="SetPermissionCommand.cs" company="Selenium Committers">
+// Licensed to the Software Freedom Conservancy (SFC) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The SFC licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+// </copyright>
+
+using OpenQA.Selenium.BiDi.Communication;
+using OpenQA.Selenium.BiDi.Modules.Browser;
+
+namespace OpenQA.Selenium.BiDi.Extensions.Permissions;
+
+internal class SetPermissionCommand(SetPermissionCommandParameters @params)
+    : Command<SetPermissionCommandParameters>(@params, "permissions.setPermission");
+
+public record SetPermissionOptions : CommandOptions;
+
+internal record SetPermissionCommandParameters(PermissionDescriptor Descriptor, PermissionState State, string Origin, UserContext? UserContext) : CommandParameters;
+
+internal record PermissionDescriptor(string Name);
+
+public enum PermissionState
+{
+    Granted,
+    Denied,
+    Prompt
+}
diff --git a/dotnet/test/common/BiDi/BiDiFixture.cs b/dotnet/test/common/BiDi/BiDiFixture.cs
index d81501a3df668..68de58ebfb657 100644
--- a/dotnet/test/common/BiDi/BiDiFixture.cs
+++ b/dotnet/test/common/BiDi/BiDiFixture.cs
@@ -44,11 +44,16 @@ public async Task BiDiSetUp()
 
         driver = EnvironmentManager.Instance.CreateDriverInstance(options);
 
-        bidi = await driver.AsBiDiAsync();
+        bidi = await CreateBiDi(driver);
 
         context = (await bidi.BrowsingContext.GetTreeAsync())[0].Context;
     }
 
+    protected virtual async Task<BiDi> CreateBiDi(IWebDriver driver)
+    {
+        return await driver.AsBiDiAsync();
+    }
+
     [TearDown]
     public async Task BiDiTearDown()
     {
diff --git a/dotnet/test/common/BiDi/Permissions/PermissionsTests.cs b/dotnet/test/common/BiDi/Permissions/PermissionsTests.cs
new file mode 100644
index 0000000000000..cc00f10aa90dc
--- /dev/null
+++ b/dotnet/test/common/BiDi/Permissions/PermissionsTests.cs
@@ -0,0 +1,70 @@
+// <copyright file="PermissionsTests.cs" company="Selenium Committers">
+// Licensed to the Software Freedom Conservancy (SFC) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The SFC licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+// </copyright>
+
+using NUnit.Framework;
+using OpenQA.Selenium.BiDi.Extensions.Permissions;
+using OpenQA.Selenium.BiDi.Modules.BrowsingContext;
+using OpenQA.Selenium.BiDi.Modules.Script;
+using OpenQA.Selenium.Environment;
+using System;
+using System.Threading.Tasks;
+
+namespace OpenQA.Selenium.BiDi.Permissions
+{
+    internal class PermissionsTests : BiDiTestFixture
+    {
+        private new PermissionsBiDi bidi => (PermissionsBiDi)base.bidi;
+
+        protected override async Task<BiDi> CreateBiDi(IWebDriver driver)
+        {
+            return await driver.AsBiDiPermissionsAsync();
+        }
+
+        [Test]
+        public async Task SettingPermissionsTest()
+        {
+            var userContext = await bidi.Browser.CreateUserContextAsync();
+            var window = await bidi.BrowsingContext.CreateAsync(ContextType.Window, new()
+            {
+                ReferenceContext = context,
+                UserContext = userContext.UserContext,
+                Background = true
+            });
+
+            var newPage = EnvironmentManager.Instance.UrlBuilder.CreateInlinePage(new InlinePage()
+                .WithBody("<div>new page</div>"));
+
+            await window.NavigateAsync(newPage);
+
+            var before = await window.Script.CallFunctionAsync("""
+            async () => (await navigator.permissions.query({ name: "geolocation" })).state
+            """, awaitPromise: true, new() { UserActivation = true, });
+
+            Assert.That(before.Result, Is.EqualTo(new RemoteValue.String("prompt")));
+
+            await bidi.Permissions.SetPermissionAsync("geolocation", PermissionState.Denied, newPage, userContext.UserContext);
+
+            var after = await window.Script.CallFunctionAsync("""
+            async () => (await navigator.permissions.query({ name: "geolocation" })).state
+            """, awaitPromise: true, new() { UserActivation = true });
+
+            Assert.That(after.Result, Is.EqualTo(new RemoteValue.String("denied")));
+        }
+    }
+}