diff --git a/extensions/vscode-api-tests/src/env.test.ts b/extensions/vscode-api-tests/src/env.test.ts
index 4746255297c2c9fe5b72c9ae3534339e6371861a..b9ed8ab85260aec5f4a1277cec9b5c640414edd2 100644
--- a/extensions/vscode-api-tests/src/env.test.ts
+++ b/extensions/vscode-api-tests/src/env.test.ts
@@ -12,6 +12,7 @@ suite('env-namespace', () => {
 
 	test('env is set', function () {
 		assert.equal(typeof env.language, 'string');
+		assert.equal(typeof env.appRoot, 'string');
 		assert.equal(typeof env.appName, 'string');
 		assert.equal(typeof env.machineId, 'string');
 		assert.equal(typeof env.sessionId, 'string');
@@ -19,9 +20,10 @@ suite('env-namespace', () => {
 
 	test('env is readonly', function () {
 		assert.throws(() => env.language = '234');
+		assert.throws(() => env.appRoot = '234');
 		assert.throws(() => env.appName = '234');
 		assert.throws(() => env.machineId = '234');
 		assert.throws(() => env.sessionId = '234');
 	});
 
-});
\ No newline at end of file
+});
diff --git a/src/vs/vscode.d.ts b/src/vs/vscode.d.ts
index 1339cffe122eabe6405c559887062becb3efa0e8..d1761abd034f8820a81f6572846efd5fddd333bf 100644
--- a/src/vs/vscode.d.ts
+++ b/src/vs/vscode.d.ts
@@ -3970,6 +3970,13 @@ declare module 'vscode' {
 		 */
 		export let appName: string;
 
+		/**
+		 * The application root folder from which the editor is running.
+		 *
+		 * @readonly
+		 */
+		export let appRoot: string;
+
 		/**
 		 * Represents the preferred user-language, like `de-CH`, `fr`, or `en-US`.
 		 *
diff --git a/src/vs/workbench/api/node/extHost.api.impl.ts b/src/vs/workbench/api/node/extHost.api.impl.ts
index 0ad36fa49eb5d6eb54d7cffa90d8e8b72f36760d..9346064940f0d8f7d23adce6bf1d8416d48e0234 100644
--- a/src/vs/workbench/api/node/extHost.api.impl.ts
+++ b/src/vs/workbench/api/node/extHost.api.impl.ts
@@ -201,7 +201,8 @@ export function createApiFactory(
 			get machineId() { return initData.telemetryInfo.machineId; },
 			get sessionId() { return initData.telemetryInfo.sessionId; },
 			get language() { return Platform.language; },
-			get appName() { return product.nameLong; }
+			get appName() { return product.nameLong; },
+			get appRoot() { return initData.environment.appRoot; },
 		});
 
 		// namespace: extensions
diff --git a/src/vs/workbench/api/node/extHost.protocol.ts b/src/vs/workbench/api/node/extHost.protocol.ts
index 3291bc7ef5ff5efbc384e4887c92b9863a0aae8c..5fb39e7d980d2878b272dca1b6f0882680e83985 100644
--- a/src/vs/workbench/api/node/extHost.protocol.ts
+++ b/src/vs/workbench/api/node/extHost.protocol.ts
@@ -53,6 +53,7 @@ export interface IEnvironment {
 	isExtensionDevelopmentDebug: boolean;
 	enableProposedApiForAll: boolean;
 	enableProposedApiFor: string | string[];
+	appRoot: string;
 	appSettingsHome: string;
 	disableExtensions: boolean;
 	userExtensionsHome: string;
diff --git a/src/vs/workbench/services/extensions/electron-browser/extensionHost.ts b/src/vs/workbench/services/extensions/electron-browser/extensionHost.ts
index 51465a972d06accb5f1ea5d7fa0301c2acaefa75..cbfcf27d66bd4b68f27b7cde5a47fa7d248f0906 100644
--- a/src/vs/workbench/services/extensions/electron-browser/extensionHost.ts
+++ b/src/vs/workbench/services/extensions/electron-browser/extensionHost.ts
@@ -341,6 +341,7 @@ export class ExtensionHostProcessWorker {
 				parentPid: process.pid,
 				environment: {
 					isExtensionDevelopmentDebug: this._isExtensionDevDebug,
+					appRoot: this._environmentService.appRoot,
 					appSettingsHome: this._environmentService.appSettingsHome,
 					disableExtensions: this._environmentService.disableExtensions,
 					userExtensionsHome: this._environmentService.extensionsPath,