AutoChangeLayout.cs

using UnityEditor;
using UnityEditor.SceneManagement;
using System.IO;
using UnityEditorInternal;
using UnityEngine;

[InitializeOnLoad]
public class AutoChangeLayout
{
    static string sceneName = null;

    static AutoChangeLayout ()
    {
        EditorApplication.update += Update;
    }

    static void Update ()
    {
        var activeScene = EditorSceneManager.GetActiveScene();

        if (! EditorApplication.isPlaying && sceneName != activeScene.name)
        {
            var oldSceneName = sceneName;

            sceneName = activeScene.name;

            if (oldSceneName == null)
            {
                return;
            }

            string layoutsPath = Path.Combine(InternalEditorUtility.unityPreferencesFolder, "Layouts");

            string layoutName;

            if (sceneName == "Level Select")
            {
                layoutName = "editor-and-hierarchy";
            }
            else
            {
                layoutName = "My custom layout";
            }

            string filePath = Path.Combine(layoutsPath, layoutName + ".wlt");

            EditorUtility.LoadWindowLayout(filePath);
        }
    }
}