diff --git a/Gruntfile.js b/Gruntfile.js
index 84ae7808b861..58a967907495 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -174,10 +174,47 @@ module.exports = function (grunt) {
         },
       },
     },
+
+    parallel: {
+      'write-out-wpt-cts-html-all': {
+        options: { grunt: true },
+        tasks: [
+          'run:write-out-wpt-cts-html',
+          'run:write-out-wpt-cts-html-chunked2sec',
+        ],
+      },
+      'all-builds': {
+        options: { grunt: true },
+        tasks: [
+          'build-standalone',
+          'build-wpt',
+          'run:build-out-node',
+        ],
+      },
+      'all-checks': {
+        options: { grunt: true },
+        tasks: [
+          'ts:check',
+          'run:validate',
+          'run:validate-cache',
+          'run:unittest',
+          'run:lint',
+          'run:tsdoc-treatWarningsAsErrors',
+        ],
+      },
+      'all-builds-and-checks': {
+        options: { grunt: true },
+        tasks: [
+          'build-all', // Internally parallel
+          'parallel:all-checks',
+        ],
+      },
+    },
   });
 
   grunt.loadNpmTasks('grunt-contrib-clean');
   grunt.loadNpmTasks('grunt-contrib-copy');
+  grunt.loadNpmTasks('grunt-parallel');
   grunt.loadNpmTasks('grunt-run');
   grunt.loadNpmTasks('grunt-ts');
 
@@ -202,14 +239,20 @@ module.exports = function (grunt) {
   grunt.registerTask('build-wpt', 'Build out-wpt/ (no checks; run after generate-common)', [
     'run:build-out-wpt',
     'run:copy-assets-wpt',
-    'run:autoformat-out-wpt',
     'copy:gen-to-out-wpt',
     'copy:htmlfiles-to-out-wpt',
-    'run:write-out-wpt-cts-html',
-    'run:write-out-wpt-cts-html-chunked2sec',
+    'parallel:write-out-wpt-cts-html-all',
+    'run:autoformat-out-wpt',
+  ]);
+  grunt.registerTask('build-all', 'Build out*/ (no checks; run after generate-common)', [
+    'parallel:all-builds',
+    'build-done-message',
   ]);
   grunt.registerTask('build-done-message', () => {
-    process.stderr.write('\nBuild completed! Running checks/tests');
+    grunt.log.writeln(`\
+=====================================================
+==== Build completed! Continuing checks/tests... ====
+=====================================================`);
   });
 
   grunt.registerTask('pre', ['all']);
@@ -217,12 +260,7 @@ module.exports = function (grunt) {
   registerTaskAndAddToHelp('all', 'Run all builds and checks', [
     'clean',
     'generate-common',
-    // None of the steps below have interdependencies.
-    'build-standalone',
-    'build-wpt',
-    'run:build-out-node',
-    'build-done-message',
-    'checks',
+    'parallel:all-builds-and-checks',
   ]);
   registerTaskAndAddToHelp('standalone', 'Build standalone (out/) (no checks)', [
     'generate-common',
@@ -235,12 +273,7 @@ module.exports = function (grunt) {
     'build-done-message',
   ]);
   registerTaskAndAddToHelp('checks', 'Run all checks (and build tsdoc)', [
-    'ts:check',
-    'run:validate',
-    'run:validate-cache',
-    'run:unittest',
-    'run:lint',
-    'run:tsdoc-treatWarningsAsErrors',
+    'parallel:all-checks',
   ]);
   registerTaskAndAddToHelp('unittest', 'Just run unittests', [
     'run:unittest',
diff --git a/package-lock.json b/package-lock.json
index 361ee369cd22..37e22310c6e4 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -39,6 +39,7 @@
         "grunt-cli": "^1.4.3",
         "grunt-contrib-clean": "^2.0.1",
         "grunt-contrib-copy": "^1.0.0",
+        "grunt-parallel": "^0.5.1",
         "grunt-run": "^0.8.1",
         "grunt-timer": "^0.6.0",
         "grunt-ts": "^6.0.0-beta.22",
@@ -4857,6 +4858,22 @@
         "node": ">=10"
       }
     },
+    "node_modules/grunt-parallel": {
+      "version": "0.5.1",
+      "resolved": "https://registry.npmjs.org/grunt-parallel/-/grunt-parallel-0.5.1.tgz",
+      "integrity": "sha512-Daa6XgRpjzkZ2F+xDOW9aTxMIpi5Y8jwUhG2x0AItW1Dd7IW2rVmA/pfTIvOw8vYhp3iGOW9lBCnS/ihQbl2+Q==",
+      "dev": true,
+      "dependencies": {
+        "lpad": "~0.1.0",
+        "q": "~0.8.12"
+      },
+      "engines": {
+        "node": "*"
+      },
+      "peerDependencies": {
+        "grunt": ">=0.4.0"
+      }
+    },
     "node_modules/grunt-run": {
       "version": "0.8.1",
       "resolved": "https://registry.npmjs.org/grunt-run/-/grunt-run-0.8.1.tgz",
@@ -6992,6 +7009,15 @@
       "integrity": "sha512-0KpjqXRVvrYyCsX1swR/XTK0va6VQkQM6MNo7PqW77ByjAhoARA8EfrP1N4+KlKj8YS0ZUCtRT/YUuhyYDujIQ==",
       "dev": true
     },
+    "node_modules/lpad": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/lpad/-/lpad-0.1.0.tgz",
+      "integrity": "sha512-Iuj1jLmrxOseShxLayj8ODB1rmAncUDwR1KCgOMGLpAxC0a3qqEo/xDeJclC7Gzi34pZUYGBLFJ4zTNjV7WWYQ==",
+      "dev": true,
+      "engines": {
+        "node": ">=0.8.0"
+      }
+    },
     "node_modules/lru-cache": {
       "version": "6.0.0",
       "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-6.0.0.tgz",
@@ -8176,6 +8202,16 @@
         "node": ">=6"
       }
     },
+    "node_modules/q": {
+      "version": "0.8.12",
+      "resolved": "https://registry.npmjs.org/q/-/q-0.8.12.tgz",
+      "integrity": "sha512-mvLmeFP7lwVSFzDhpVhkI9Jw3u9goGQ2IY9nbSNMA4OZyviFjs2XILKMesUz8nBz4deKS9eWibvEuBNlRxZHBg==",
+      "dev": true,
+      "engines": {
+        "node": ">=0.6.0",
+        "teleport": ">=0.2.0"
+      }
+    },
     "node_modules/qs": {
       "version": "6.11.0",
       "resolved": "https://registry.npmjs.org/qs/-/qs-6.11.0.tgz",
@@ -13989,6 +14025,16 @@
         "which": "~2.0.2"
       }
     },
+    "grunt-parallel": {
+      "version": "0.5.1",
+      "resolved": "https://registry.npmjs.org/grunt-parallel/-/grunt-parallel-0.5.1.tgz",
+      "integrity": "sha512-Daa6XgRpjzkZ2F+xDOW9aTxMIpi5Y8jwUhG2x0AItW1Dd7IW2rVmA/pfTIvOw8vYhp3iGOW9lBCnS/ihQbl2+Q==",
+      "dev": true,
+      "requires": {
+        "lpad": "~0.1.0",
+        "q": "~0.8.12"
+      }
+    },
     "grunt-run": {
       "version": "0.8.1",
       "resolved": "https://registry.npmjs.org/grunt-run/-/grunt-run-0.8.1.tgz",
@@ -15510,6 +15556,12 @@
       "integrity": "sha512-0KpjqXRVvrYyCsX1swR/XTK0va6VQkQM6MNo7PqW77ByjAhoARA8EfrP1N4+KlKj8YS0ZUCtRT/YUuhyYDujIQ==",
       "dev": true
     },
+    "lpad": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/lpad/-/lpad-0.1.0.tgz",
+      "integrity": "sha512-Iuj1jLmrxOseShxLayj8ODB1rmAncUDwR1KCgOMGLpAxC0a3qqEo/xDeJclC7Gzi34pZUYGBLFJ4zTNjV7WWYQ==",
+      "dev": true
+    },
     "lru-cache": {
       "version": "6.0.0",
       "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-6.0.0.tgz",
@@ -16401,6 +16453,12 @@
       "integrity": "sha512-vYt7UD1U9Wg6138shLtLOvdAu+8DsC/ilFtEVHcH+wydcSpNE20AfSOduf6MkRFahL5FY7X1oU7nKVZFtfq8Fg==",
       "dev": true
     },
+    "q": {
+      "version": "0.8.12",
+      "resolved": "https://registry.npmjs.org/q/-/q-0.8.12.tgz",
+      "integrity": "sha512-mvLmeFP7lwVSFzDhpVhkI9Jw3u9goGQ2IY9nbSNMA4OZyviFjs2XILKMesUz8nBz4deKS9eWibvEuBNlRxZHBg==",
+      "dev": true
+    },
     "qs": {
       "version": "6.11.0",
       "resolved": "https://registry.npmjs.org/qs/-/qs-6.11.0.tgz",
diff --git a/package.json b/package.json
index c9d82e3ba9e2..6f6b3b0df54b 100644
--- a/package.json
+++ b/package.json
@@ -63,6 +63,7 @@
     "grunt-cli": "^1.4.3",
     "grunt-contrib-clean": "^2.0.1",
     "grunt-contrib-copy": "^1.0.0",
+    "grunt-parallel": "^0.5.1",
     "grunt-run": "^0.8.1",
     "grunt-timer": "^0.6.0",
     "grunt-ts": "^6.0.0-beta.22",