diff --git a/extensions/typescript/package.json b/extensions/typescript/package.json
index e9f9f98887a..c94700ecfd6 100644
--- a/extensions/typescript/package.json
+++ b/extensions/typescript/package.json
@@ -229,6 +229,11 @@
           "default": false,
           "description": "%format.insertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces%"
         },
+        "typescript.format.insertSpaceAfterTypeAssertion": {
+          "type": "boolean",
+          "default": false,
+          "description": "%format.insertSpaceAfterTypeAssertion%"
+        },
         "typescript.format.placeOpenBraceOnNewLineForFunctions": {
           "type": "boolean",
           "default": false,
diff --git a/extensions/typescript/package.nls.json b/extensions/typescript/package.nls.json
index 890ac8e8ef6..d23b9011527 100644
--- a/extensions/typescript/package.nls.json
+++ b/extensions/typescript/package.nls.json
@@ -23,6 +23,7 @@
 	"format.insertSpaceAfterOpeningAndBeforeClosingNonemptyBraces": "Defines space handling after opening and before closing non empty braces. Requires TypeScript >= 2.3.0.",
 	"format.insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces": "Defines space handling after opening and before closing template string braces. Requires TypeScript >= 2.0.6.",
 	"format.insertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces": "Defines space handling after opening and before closing JSX expression braces. Requires TypeScript >= 2.0.6.",
+	"format.insertSpaceAfterTypeAssertion": "Defines space handling after type assertions in TypeScript. Requires TypeScript >= 2.4.",
 	"format.placeOpenBraceOnNewLineForFunctions": "Defines whether an open brace is put onto a new line for functions or not.",
 	"format.placeOpenBraceOnNewLineForControlBlocks": "Defines whether an open brace is put onto a new line for control blocks or not.",
 	"javascript.validate.enable": "Enable/disable JavaScript validation.",
diff --git a/extensions/typescript/src/features/formattingProvider.ts b/extensions/typescript/src/features/formattingProvider.ts
index 2687d317b2b..2554620ac65 100644
--- a/extensions/typescript/src/features/formattingProvider.ts
+++ b/extensions/typescript/src/features/formattingProvider.ts
@@ -21,6 +21,7 @@ interface Configuration {
 	insertSpaceAfterOpeningAndBeforeClosingNonemptyBraces: boolean;
 	insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces: boolean;
 	insertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces: boolean;
+	insertSpaceAfterTypeAssertion: boolean;
 	insertSpaceBeforeFunctionParenthesis: boolean;
 	placeOpenBraceOnNewLineForFunctions: boolean;
 	placeOpenBraceOnNewLineForControlBlocks: boolean;
@@ -39,6 +40,7 @@ namespace Configuration {
 	export const insertSpaceAfterOpeningAndBeforeClosingNonemptyBraces = 'insertSpaceAfterOpeningAndBeforeClosingNonemptyBraces';
 	export const insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces = 'insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces';
 	export const insertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces = 'insertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces';
+	export const insertSpaceAfterTypeAssertion = 'insertSpaceAfterTypeAssertion';
 	export const placeOpenBraceOnNewLineForFunctions = 'placeOpenBraceOnNewLineForFunctions';
 	export const placeOpenBraceOnNewLineForControlBlocks = 'placeOpenBraceOnNewLineForControlBlocks';
 
@@ -68,6 +70,7 @@ namespace Configuration {
 		result.insertSpaceAfterOpeningAndBeforeClosingNonemptyBraces = true;
 		result.insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces = false;
 		result.insertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces = false;
+		result.insertSpaceAfterTypeAssertion = false;
 		result.placeOpenBraceOnNewLineForFunctions = false;
 		result.placeOpenBraceOnNewLineForControlBlocks = false;
 		return result;
@@ -225,6 +228,7 @@ export default class TypeScriptFormattingProvider implements DocumentRangeFormat
 			insertSpaceAfterOpeningAndBeforeClosingNonemptyBraces: this.config.insertSpaceAfterOpeningAndBeforeClosingNonemptyBraces,
 			insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces: this.config.insertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces,
 			insertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces: this.config.insertSpaceAfterOpeningAndBeforeClosingJsxExpressionBraces,
+			insertSpaceAfterTypeAssertion: this.config.insertSpaceAfterTypeAssertion,
 			placeOpenBraceOnNewLineForFunctions: this.config.placeOpenBraceOnNewLineForFunctions,
 			placeOpenBraceOnNewLineForControlBlocks: this.config.placeOpenBraceOnNewLineForControlBlocks,