Index: Core/Common/test/Core.Common.TestUtil.Test/TestHelperTest.cs
===================================================================
diff -u -rbb0308b863b1f9b65a349c4291e1d44944ebf805 -rf4bdeb639e4a7a0bdb6442f6238285cc9cee4d6c
--- Core/Common/test/Core.Common.TestUtil.Test/TestHelperTest.cs	(.../TestHelperTest.cs)	(revision bb0308b863b1f9b65a349c4291e1d44944ebf805)
+++ Core/Common/test/Core.Common.TestUtil.Test/TestHelperTest.cs	(.../TestHelperTest.cs)	(revision f4bdeb639e4a7a0bdb6442f6238285cc9cee4d6c)
@@ -80,6 +80,88 @@
         }
 
         [Test]
+        public void GetScratchPadPath_WithoutPath_ReturnRootFolder()
+        {
+            // Call
+            string actualPath = TestHelper.GetScratchPadPath();
+
+            // Assert
+            var expectedPath = Path.Combine(TestHelper.SolutionRoot, "Scratchpad");
+            Assert.AreEqual(expectedPath, actualPath);
+            Assert.IsTrue(Directory.Exists(actualPath),
+                          $"The directory '{expectedPath}' should exist, such that unit tests have a clean environment to temporarily write files and directories to.");
+        }
+
+
+        [Test]
+        public void GetScratchPadPath_WithoutPathAndFolderDoesntExist_ThrowIOException()
+        {
+            // Setup
+            string actualPath = TestHelper.GetScratchPadPath();
+
+            Directory.Delete(actualPath, true);
+
+            try
+            {
+                // Call
+                TestDelegate call = () => TestHelper.GetScratchPadPath();
+
+                // Assert
+                string message = Assert.Throws<IOException>(call).Message;
+                const string expectedMessage = "The 'Scratchpad' folder has been deleted from the trunk, while tests require the existence of this folder for writing to disk temporarily.";
+                Assert.AreEqual(expectedMessage, message);
+            }
+            finally
+            {
+                Directory.CreateDirectory(actualPath);
+            }
+        }
+
+        [Test]
+        public void GetScratchPadPath_WithSubPath_ReturnPathInScratchPad()
+        {
+            // Setup
+            string subPath = Path.Combine("test", "1.234");
+
+            // Call
+            string actualPath = TestHelper.GetScratchPadPath(subPath);
+
+            // Assert
+            var expectedPath = Path.Combine(TestHelper.SolutionRoot, "Scratchpad", subPath);
+            Assert.AreEqual(expectedPath, actualPath);
+            Assert.IsFalse(File.Exists(actualPath),
+                           $"The file '{expectedPath}' should not exist, as the folder should always be empty at the start of any unit test.");
+            Assert.IsFalse(Directory.Exists(actualPath),
+                           $"The directory '{expectedPath}' should not exist, as the folder should always be empty at the start of any unit test.");
+        }
+
+        [Test]
+        public void GetScratchPadPath_WithSubPathAndScratchPadFolderDoesntExist_ThrowIOException()
+        {
+            // Setup
+            string actualPath = TestHelper.GetScratchPadPath();
+
+            Directory.Delete(actualPath, true);
+
+            try
+            {
+                string subPath = Path.Combine("test", "1.234");
+
+                // Call
+                TestDelegate call = () => TestHelper.GetScratchPadPath(subPath);
+
+                // Assert
+                string message = Assert.Throws<IOException>(call).Message;
+                const string expectedMessage = "The 'Scratchpad' folder has been deleted from the trunk, while tests require the existence of this folder for writing to disk temporarily.";
+                Assert.AreEqual(expectedMessage, message);
+            }
+            finally
+            {
+                Directory.CreateDirectory(actualPath);
+            }
+        }
+
+        [Test]
         public void GetTestDataPath_Always_VerifiedTestPaths()
         {
             string path = TestHelper.GetTestDataPath(TestDataPath.Application.Ringtoets.Storage);
Index: Core/Common/test/Core.Common.TestUtil/TestHelper.cs
===================================================================
diff -u -r6a5d7b40b7ba4dcb73e393075338352d194e97c2 -rf4bdeb639e4a7a0bdb6442f6238285cc9cee4d6c
--- Core/Common/test/Core.Common.TestUtil/TestHelper.cs	(.../TestHelper.cs)	(revision 6a5d7b40b7ba4dcb73e393075338352d194e97c2)
+++ Core/Common/test/Core.Common.TestUtil/TestHelper.cs	(.../TestHelper.cs)	(revision f4bdeb639e4a7a0bdb6442f6238285cc9cee4d6c)
@@ -48,6 +48,36 @@
         }
 
         /// <summary>
+        /// Returns the location on disk that can be used safely for writing to disk temporarily.
+        /// </summary>
+        /// <returns>The folder path.</returns>
+        /// <remarks>Caller is responsible for cleaning up files put in the folder.</remarks>
+        /// <exception cref="IOException">Thrown when the folder doesn't exist.</exception>
+        /// <seealso cref="GetScratchPadPath(string)"/>
+        public static string GetScratchPadPath()
+        {
+            string scratchPadPath = Path.Combine(Path.GetDirectoryName(SolutionRoot), "Scratchpad");
+            if (!Directory.Exists(scratchPadPath))
+            {
+                throw new IOException("The 'Scratchpad' folder has been deleted from the trunk, while tests require the existence of this folder for writing to disk temporarily.");
+            }
+            return scratchPadPath;
+        }
+
+        /// <summary>
+        /// Returns the location on disk that can be used safely for writing to disk temporarily.
+        /// </summary>
+        /// <param name="path">The filepath or folderpath inside the 'scratchpad' folder.</param>
+        /// <returns>The folder path.</returns>
+        /// <remarks>Caller is responsible for cleaning up files put in the folder.</remarks>
+        /// <exception cref="IOException">Thrown when the folder doesn't exist.</exception>
+        /// <seealso cref="GetScratchPadPath()"/>
+        public static string GetScratchPadPath(string path)
+        {
+            return Path.Combine(GetScratchPadPath(), path);
+        }
+
+        /// <summary>
         /// Returns a full path to a test data directory given the <paramref name="testDataPath"/>.
         /// </summary>
         /// <param name="testDataPath">The path to construct a full test data path for.</param>