diff --git a/packages/angular_devkit/build_angular/BUILD.bazel b/packages/angular_devkit/build_angular/BUILD.bazel
index 4568c647ed9a..4e6a6f4be098 100644
--- a/packages/angular_devkit/build_angular/BUILD.bazel
+++ b/packages/angular_devkit/build_angular/BUILD.bazel
@@ -56,6 +56,11 @@ ts_json_schema(
     src = "src/tslint/schema.json",
 )
 
+ts_json_schema(
+    name = "ng_packagr_schema",
+    src = "src/ng-packagr/schema.json",
+)
+
 ts_library(
     name = "build_angular",
     srcs = glob(
@@ -77,6 +82,7 @@ ts_library(
         "//packages/angular_devkit/build_angular:src/protractor/schema.ts",
         "//packages/angular_devkit/build_angular:src/server/schema.ts",
         "//packages/angular_devkit/build_angular:src/tslint/schema.ts",
+        "//packages/angular_devkit/build_angular:src/ng-packagr/schema.ts",
     ],
     data = glob(
         include = [
@@ -145,6 +151,7 @@ ts_library(
         "@npm//loader-utils",
         "@npm//mini-css-extract-plugin",
         "@npm//minimatch",
+        "@npm//ng-packagr",
         "@npm//open",
         "@npm//parse5",
         "@npm//parse5-htmlparser2-tree-adapter",
@@ -302,6 +309,7 @@ LARGE_SPECS = {
             "@npm//@angular/platform-server",
         ],
     },
+    "ng-packagr": {},
     "browser": {
         "shards": 50,
         "size": "large",
diff --git a/packages/angular_devkit/build_angular/builders.json b/packages/angular_devkit/build_angular/builders.json
index a378a2fd2fb2..c14be31f4ca1 100644
--- a/packages/angular_devkit/build_angular/builders.json
+++ b/packages/angular_devkit/build_angular/builders.json
@@ -4,22 +4,22 @@
     "app-shell": {
       "implementation": "./src/app-shell",
       "schema": "./src/app-shell/schema.json",
-      "description": "Build a server app and a browser app, then render the index.html and use it for the browser output."
+      "description": "Build a server application and a browser application, then render the index.html and use it for the browser output."
     },
     "browser": {
       "implementation": "./src/browser",
       "schema": "./src/browser/schema.json",
-      "description": "Build a browser app."
+      "description": "Build a browser application."
     },
     "dev-server": {
       "implementation": "./src/dev-server",
       "schema": "./src/dev-server/schema.json",
-      "description": "Serve a browser app."
+      "description": "Serve a browser application."
     },
     "extract-i18n": {
       "implementation": "./src/extract-i18n",
       "schema": "./src/extract-i18n/schema.json",
-      "description": "Extract i18n strings from a browser app."
+      "description": "Extract i18n strings from a browser application."
     },
     "karma": {
       "implementation": "./src/karma",
@@ -34,12 +34,17 @@
     "tslint": {
       "implementation": "./src/tslint",
       "schema": "./src/tslint/schema.json",
-      "description": "Run tslint over a TS project."
+      "description": "Run tslint over a TypeScript project."
     },
     "server": {
       "implementation": "./src/server",
       "schema": "./src/server/schema.json",
       "description": "Build a server Angular application."
+    },
+    "ng-packagr": {
+      "implementation": "./src/ng-packagr",
+      "schema": "./src/ng-packagr/schema.json",
+      "description": "Build a library with ng-packagr."
     }
   }
 }
diff --git a/packages/angular_devkit/build_angular/package.json b/packages/angular_devkit/build_angular/package.json
index d457b1aa58f9..d4b007d1905e 100644
--- a/packages/angular_devkit/build_angular/package.json
+++ b/packages/angular_devkit/build_angular/package.json
@@ -75,11 +75,15 @@
   },
   "peerDependencies": {
     "@angular/compiler-cli": ">=10.1.0-next.0 < 11",
+    "ng-packagr": "^10.0.0",
     "typescript": ">=3.9 < 3.10"
   },
   "peerDependenciesMeta": {
     "@angular/localize": {
       "optional": true
+    },
+    "ng-packagr": {
+      "optional": true
     }
   }
 }
diff --git a/packages/angular_devkit/build_angular/src/index.ts b/packages/angular_devkit/build_angular/src/index.ts
index 0a5d3c78329c..83613150fc33 100644
--- a/packages/angular_devkit/build_angular/src/index.ts
+++ b/packages/angular_devkit/build_angular/src/index.ts
@@ -58,3 +58,8 @@ export {
   ServerBuilderOptions,
   ServerBuilderOutput,
 } from './server';
+
+export {
+  execute as executeNgPackagrBuilder,
+  NgPackagrBuilderOptions,
+} from './ng-packagr';
diff --git a/packages/angular_devkit/build_angular/src/ng-packagr/index.ts b/packages/angular_devkit/build_angular/src/ng-packagr/index.ts
new file mode 100644
index 000000000000..d8e2fa24262c
--- /dev/null
+++ b/packages/angular_devkit/build_angular/src/ng-packagr/index.ts
@@ -0,0 +1,40 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+import { BuilderContext, BuilderOutput, createBuilder } from '@angular-devkit/architect';
+import { resolve } from 'path';
+import { Observable, from } from 'rxjs';
+import { mapTo, switchMap } from 'rxjs/operators';
+import { Schema as NgPackagrBuilderOptions } from './schema';
+
+async function initialize(
+  options: NgPackagrBuilderOptions,
+  root: string,
+): Promise<import('ng-packagr').NgPackagr> {
+  const packager = (await import('ng-packagr')).ngPackagr();
+
+  packager.forProject(resolve(root, options.project));
+
+  if (options.tsConfig) {
+    packager.withTsConfig(resolve(root, options.tsConfig));
+  }
+
+  return packager;
+}
+
+export function execute(
+  options: NgPackagrBuilderOptions,
+  context: BuilderContext,
+): Observable<BuilderOutput> {
+  return from(initialize(options, context.workspaceRoot)).pipe(
+    switchMap(packager => options.watch ? packager.watch() : packager.build()),
+    mapTo({ success: true }),
+  );
+}
+
+export { NgPackagrBuilderOptions };
+export default createBuilder<Record<string, string> & NgPackagrBuilderOptions>(execute);
diff --git a/packages/angular_devkit/build_angular/src/ng-packagr/schema.json b/packages/angular_devkit/build_angular/src/ng-packagr/schema.json
new file mode 100644
index 000000000000..a72def315064
--- /dev/null
+++ b/packages/angular_devkit/build_angular/src/ng-packagr/schema.json
@@ -0,0 +1,25 @@
+{
+  "$schema": "http://json-schema.org/draft-07/schema",
+  "title": "ng-packagr Target",
+  "description": "ng-packagr target options for Build Architect. Use to build library projects.",
+  "type": "object",
+  "properties": {
+    "project": {
+      "type": "string",
+      "description": "The file path for the ng-packagr configuration file, relative to the current workspace."
+    },
+    "tsConfig": {
+      "type": "string",
+      "description": "The full path for the TypeScript configuration file, relative to the current workspace."
+    },
+    "watch": {
+      "type": "boolean",
+      "description": "Run build when files change.",
+      "default": false
+    }
+  },
+  "additionalProperties": false,
+  "required": [
+    "project"
+  ]
+}
diff --git a/packages/angular_devkit/build_angular/src/ng-packagr/works_spec.ts b/packages/angular_devkit/build_angular/src/ng-packagr/works_spec.ts
new file mode 100644
index 000000000000..550a92f9ef9e
--- /dev/null
+++ b/packages/angular_devkit/build_angular/src/ng-packagr/works_spec.ts
@@ -0,0 +1,128 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+import { Architect } from '@angular-devkit/architect';
+import { WorkspaceNodeModulesArchitectHost } from '@angular-devkit/architect/node';
+import { TestProjectHost, TestingArchitectHost } from '@angular-devkit/architect/testing';
+import {
+  getSystemPath,
+  join,
+  normalize,
+  schema,
+  virtualFs,
+  workspaces,
+} from '@angular-devkit/core';
+import { map, take, tap } from 'rxjs/operators';
+import { veEnabled } from '../test-utils';
+
+// Default timeout for large specs is 2.5 minutes.
+jasmine.DEFAULT_TIMEOUT_INTERVAL = 150000;
+
+
+describe('NgPackagr Builder', () => {
+  const workspaceRoot = join(normalize(__dirname), `../../test/hello-world-lib/`);
+  const host = new TestProjectHost(workspaceRoot);
+  let architect: Architect;
+
+  beforeEach(async () => {
+    await host.initialize().toPromise();
+
+    const registry = new schema.CoreSchemaRegistry();
+    registry.addPostTransform(schema.transforms.addUndefinedDefaults);
+
+    const workspaceSysPath = getSystemPath(host.root());
+    const { workspace } = await workspaces.readWorkspace(
+      workspaceSysPath,
+      workspaces.createWorkspaceHost(host),
+    );
+    const architectHost = new TestingArchitectHost(
+      workspaceSysPath,
+      workspaceSysPath,
+      new WorkspaceNodeModulesArchitectHost(workspace, workspaceSysPath),
+    );
+
+    architect = new Architect(architectHost, registry);
+
+    // Set AOT compilation to use VE if needed.
+    if (veEnabled) {
+      host.replaceInFile('tsconfig.json', `"enableIvy": true,`, `"enableIvy": false,`);
+    }
+  });
+
+  afterEach(() => host.restore().toPromise());
+
+  it('builds and packages a library', async () => {
+    const run = await architect.scheduleTarget({ project: 'lib', target: 'build' });
+
+    await expectAsync(run.result).toBeResolvedTo(jasmine.objectContaining({ success: true }));
+
+    await run.stop();
+
+    expect(host.scopedSync().exists(normalize('./dist/lib/fesm2015/lib.js'))).toBe(true);
+    const content = virtualFs.fileBufferToString(
+      host.scopedSync().read(normalize('./dist/lib/fesm2015/lib.js')),
+    );
+    expect(content).toContain('lib works');
+
+    if (veEnabled) {
+      expect(content).not.toContain('ɵcmp');
+    } else {
+      expect(content).toContain('ɵcmp');
+    }
+  });
+
+  it('rebuilds on TS file changes', async () => {
+    const goldenValueFiles: { [path: string]: string } = {
+      'projects/lib/src/lib/lib.component.ts': `
+      import { Component } from '@angular/core';
+
+      @Component({
+        selector: 'lib',
+        template: 'lib update works!'
+      })
+      export class LibComponent { }
+      `,
+    };
+
+    const run = await architect.scheduleTarget(
+      { project: 'lib', target: 'build' },
+      { watch: true },
+    );
+
+    let buildNumber = 0;
+
+    await run.output.pipe(
+      tap((buildEvent) => expect(buildEvent.success).toBe(true)),
+      map(() => {
+        const fileName = './dist/lib/fesm2015/lib.js';
+        const content = virtualFs.fileBufferToString(
+          host.scopedSync().read(normalize(fileName)),
+        );
+
+        return content;
+      }),
+      tap(content => {
+        buildNumber += 1;
+        switch (buildNumber) {
+          case 1:
+            expect(content).toMatch(/lib works/);
+            host.writeMultipleFiles(goldenValueFiles);
+            break;
+
+          case 2:
+            expect(content).toMatch(/lib update works/);
+            break;
+          default:
+            break;
+        }
+      }),
+      take(2),
+    ).toPromise();
+
+    await run.stop();
+  });
+});