diff --git a/packages/@angular/cli/commands/completion.ts b/packages/@angular/cli/commands/completion.ts
index 5a89bdef2deb..d7aa2471c8b4 100644
--- a/packages/@angular/cli/commands/completion.ts
+++ b/packages/@angular/cli/commands/completion.ts
@@ -1,7 +1,7 @@
 import * as fs from 'fs';
 import * as path from 'path';
 
-import { oneLine, stripIndent } from 'common-tags';
+import { stripIndent } from 'common-tags';
 
 const stringUtils = require('ember-cli-string-utils');
 const Command = require('../ember-cli/lib/models/command');
diff --git a/packages/@angular/cli/commands/doc.ts b/packages/@angular/cli/commands/doc.ts
index 2b055acfebca..20b84e0e23e8 100644
--- a/packages/@angular/cli/commands/doc.ts
+++ b/packages/@angular/cli/commands/doc.ts
@@ -10,7 +10,7 @@ const DocCommand = Command.extend({
     '<keyword>'
   ],
 
-  run: function(commandOptions: any, rawArgs: Array<string>) {
+  run: function(_commandOptions: any, rawArgs: Array<string>) {
     const keyword = rawArgs[0];
 
     const docTask = new DocTask({
diff --git a/packages/@angular/cli/commands/eject.ts b/packages/@angular/cli/commands/eject.ts
index e9e7867b4a88..cfb05fd8556d 100644
--- a/packages/@angular/cli/commands/eject.ts
+++ b/packages/@angular/cli/commands/eject.ts
@@ -1,5 +1,4 @@
 import { BuildOptions } from '../models/build-options';
-import { Version } from '../upgrade/version';
 import {baseBuildCommandOptions} from './build';
 
 const Command = require('../ember-cli/lib/models/command');
diff --git a/packages/@angular/cli/commands/new.ts b/packages/@angular/cli/commands/new.ts
index a9b1cc2ee1d2..47af03940b3e 100644
--- a/packages/@angular/cli/commands/new.ts
+++ b/packages/@angular/cli/commands/new.ts
@@ -1,4 +1,3 @@
-import * as chalk from 'chalk';
 import InitCommand from './init';
 import { validateProjectName } from '../utilities/validate-project-name';
 
diff --git a/packages/@angular/cli/commands/serve.ts b/packages/@angular/cli/commands/serve.ts
index 20d12f119d75..f4fcf1e420d1 100644
--- a/packages/@angular/cli/commands/serve.ts
+++ b/packages/@angular/cli/commands/serve.ts
@@ -4,7 +4,6 @@ import { baseBuildCommandOptions } from './build';
 import { CliConfig } from '../models/config';
 import { Version } from '../upgrade/version';
 import { ServeTaskOptions } from './serve';
-import { checkPort } from '../utilities/check-port';
 import { overrideOptions } from '../utilities/override-options';
 
 const SilentError = require('silent-error');
diff --git a/packages/@angular/cli/lib/ast-tools/ast-utils.ts b/packages/@angular/cli/lib/ast-tools/ast-utils.ts
index 5377afa50231..370bb79b3d14 100644
--- a/packages/@angular/cli/lib/ast-tools/ast-utils.ts
+++ b/packages/@angular/cli/lib/ast-tools/ast-utils.ts
@@ -88,7 +88,7 @@ export function insertAfterLastOccurrence(nodes: ts.Node[], toInsert: string,
 }
 
 
-export function getContentOfKeyLiteral(source: ts.SourceFile, node: ts.Node): string {
+export function getContentOfKeyLiteral(_source: ts.SourceFile, node: ts.Node): string {
   if (node.kind == ts.SyntaxKind.Identifier) {
     return (node as ts.Identifier).text;
   } else if (node.kind == ts.SyntaxKind.StringLiteral) {
@@ -101,7 +101,7 @@ export function getContentOfKeyLiteral(source: ts.SourceFile, node: ts.Node): st
 
 
 function _angularImportsFromNode(node: ts.ImportDeclaration,
-                                 sourceFile: ts.SourceFile): {[name: string]: string} {
+                                 _sourceFile: ts.SourceFile): {[name: string]: string} {
   const ms = node.moduleSpecifier;
   let modulePath: string | null = null;
   switch (ms.kind) {
diff --git a/packages/@angular/cli/lib/base-href-webpack/base-href-webpack-plugin.spec.ts b/packages/@angular/cli/lib/base-href-webpack/base-href-webpack-plugin.spec.ts
index c0c2e320857c..3e3293e51e8f 100644
--- a/packages/@angular/cli/lib/base-href-webpack/base-href-webpack-plugin.spec.ts
+++ b/packages/@angular/cli/lib/base-href-webpack/base-href-webpack-plugin.spec.ts
@@ -4,9 +4,9 @@ import {BaseHrefWebpackPlugin} from './base-href-webpack-plugin';
 
 function mockCompiler(indexHtml: string, callback: Function) {
   return {
-    plugin: function (event: any, compilerCallback: Function) {
+    plugin: function (_event: any, compilerCallback: Function) {
       const compilation = {
-        plugin: function (hook: any, compilationCallback: Function) {
+        plugin: function (_hook: any, compilationCallback: Function) {
           const htmlPluginData = {
             html: indexHtml
           };
@@ -29,7 +29,7 @@ describe('base href webpack plugin', () => {
   it('should do nothing when baseHref is null', () => {
     const plugin = new BaseHrefWebpackPlugin({ baseHref: null });
 
-    const compiler = mockCompiler(html, (x: any, htmlPluginData: any) => {
+    const compiler = mockCompiler(html, (_x: any, htmlPluginData: any) => {
       expect(htmlPluginData.html).toEqual('<body><head></head></body>');
     });
     plugin.apply(compiler);
@@ -37,7 +37,7 @@ describe('base href webpack plugin', () => {
 
   it('should insert base tag when not exist', function () {
     const plugin = new BaseHrefWebpackPlugin({ baseHref: '/' });
-    const compiler = mockCompiler(html, (x: any, htmlPluginData: any) => {
+    const compiler = mockCompiler(html, (_x: any, htmlPluginData: any) => {
         expect(htmlPluginData.html).toEqual(oneLineTrim`
           <html>
             <head><base href="/"></head>
@@ -55,7 +55,7 @@ describe('base href webpack plugin', () => {
     const compiler = mockCompiler(oneLineTrim`
           <head><base href="/" target="_blank"></head>
           <body></body>
-        `, (x: any, htmlPluginData: any) => {
+        `, (_x: any, htmlPluginData: any) => {
       expect(htmlPluginData.html).toEqual(oneLineTrim`
           <head><base href="/myUrl/" target="_blank"></head>
           <body></body>
diff --git a/packages/@angular/cli/models/webpack-configs/common.ts b/packages/@angular/cli/models/webpack-configs/common.ts
index 81829a3b3a68..f561b50133b7 100644
--- a/packages/@angular/cli/models/webpack-configs/common.ts
+++ b/packages/@angular/cli/models/webpack-configs/common.ts
@@ -6,7 +6,6 @@ import { BaseHrefWebpackPlugin } from '../../lib/base-href-webpack';
 import { extraEntryParser, lazyChunksFilter, getOutputHashFormat } from './utils';
 import { WebpackConfigOptions } from '../webpack-config';
 
-const autoprefixer = require('autoprefixer');
 const ProgressPlugin = require('webpack/lib/ProgressPlugin');
 const HtmlWebpackPlugin = require('html-webpack-plugin');
 
diff --git a/packages/@angular/cli/models/webpack-configs/development.ts b/packages/@angular/cli/models/webpack-configs/development.ts
index 2f4e580bf762..37cb362d12eb 100644
--- a/packages/@angular/cli/models/webpack-configs/development.ts
+++ b/packages/@angular/cli/models/webpack-configs/development.ts
@@ -1,5 +1,5 @@
 import { WebpackConfigOptions } from '../webpack-config';
 
-export const getDevConfig = function (wco: WebpackConfigOptions) {
+export const getDevConfig = function (_wco: WebpackConfigOptions) {
   return {};
 };
diff --git a/packages/@angular/cli/models/webpack-configs/production.ts b/packages/@angular/cli/models/webpack-configs/production.ts
index 383ed29a4c7d..c629ecb27732 100644
--- a/packages/@angular/cli/models/webpack-configs/production.ts
+++ b/packages/@angular/cli/models/webpack-configs/production.ts
@@ -9,7 +9,6 @@ import { WebpackConfigOptions } from '../webpack-config';
 
 export const getProdConfig = function (wco: WebpackConfigOptions) {
   const { projectRoot, buildOptions, appConfig } = wco;
-  const appRoot = path.resolve(projectRoot, appConfig.root);
 
   let extraPlugins: any[] = [];
   let entryPoints: {[key: string]: string[]} = {};
diff --git a/packages/@angular/cli/models/webpack-configs/styles.ts b/packages/@angular/cli/models/webpack-configs/styles.ts
index 532b0c8c99ed..fa53e3165b85 100644
--- a/packages/@angular/cli/models/webpack-configs/styles.ts
+++ b/packages/@angular/cli/models/webpack-configs/styles.ts
@@ -1,6 +1,5 @@
 import * as webpack from 'webpack';
 import * as path from 'path';
-import { oneLineTrim } from 'common-tags';
 import {
   SuppressExtractedTextChunksWebpackPlugin
 } from '../../plugins/suppress-entry-chunks-webpack-plugin';
diff --git a/packages/@angular/cli/models/webpack-configs/typescript.ts b/packages/@angular/cli/models/webpack-configs/typescript.ts
index b3fac77f34ca..f461efe5a0d3 100644
--- a/packages/@angular/cli/models/webpack-configs/typescript.ts
+++ b/packages/@angular/cli/models/webpack-configs/typescript.ts
@@ -1,7 +1,6 @@
-import * as fs from 'fs';
 import * as path from 'path';
 import { stripIndent } from 'common-tags';
-import {AotPlugin, AotPluginOptions} from '@ngtools/webpack';
+import {AotPlugin} from '@ngtools/webpack';
 import { WebpackConfigOptions } from '../webpack-config';
 
 const SilentError = require('silent-error');
diff --git a/packages/@angular/cli/plugins/static-asset.ts b/packages/@angular/cli/plugins/static-asset.ts
index 4baf843be97f..39a0fc1fe3bb 100644
--- a/packages/@angular/cli/plugins/static-asset.ts
+++ b/packages/@angular/cli/plugins/static-asset.ts
@@ -1,5 +1,3 @@
-import * as fs from 'fs';
-
 export class StaticAssetPlugin {
 
   constructor(private name: string, private contents: string) {}
diff --git a/packages/@angular/cli/tasks/eject.ts b/packages/@angular/cli/tasks/eject.ts
index 5a9a1bdfb8cb..c1c570bcf9ac 100644
--- a/packages/@angular/cli/tasks/eject.ts
+++ b/packages/@angular/cli/tasks/eject.ts
@@ -24,7 +24,6 @@ const HtmlWebpackPlugin = require('html-webpack-plugin');
 const SilentError = require('silent-error');
 const Task = require('../ember-cli/lib/models/task');
 
-const CommonsChunkPlugin = webpack.optimize.CommonsChunkPlugin;
 const LoaderOptionsPlugin = webpack.LoaderOptionsPlugin;
 const ProgressPlugin = require('webpack/lib/ProgressPlugin');
 
@@ -319,7 +318,7 @@ class JsonWebpackSerializer {
     });
   }
 
-  private _replacer(key: string, value: any) {
+  private _replacer(_key: string, value: any) {
     if (value === undefined) {
       return value;
     }
diff --git a/packages/@angular/cli/tasks/lint.ts b/packages/@angular/cli/tasks/lint.ts
index 6cd8c1ab31d6..e30c28a40a6f 100644
--- a/packages/@angular/cli/tasks/lint.ts
+++ b/packages/@angular/cli/tasks/lint.ts
@@ -1,6 +1,5 @@
 const Task = require('../ember-cli/lib/models/task');
 import * as chalk from 'chalk';
-import * as path from 'path';
 import * as glob from 'glob';
 import * as ts from 'typescript';
 import { requireProjectModule } from '../utilities/require-project-module';
diff --git a/packages/@angular/cli/tasks/npm-install.ts b/packages/@angular/cli/tasks/npm-install.ts
index f0d4f80bfe4d..923432c96249 100644
--- a/packages/@angular/cli/tasks/npm-install.ts
+++ b/packages/@angular/cli/tasks/npm-install.ts
@@ -14,7 +14,7 @@ export default Task.extend({
     return new Promise(function(resolve, reject) {
       ui.writeLine(chalk.green(`Installing packages for tooling via ${packageManager}.`));
       exec(`${packageManager} install`,
-        (err: NodeJS.ErrnoException, stdout: string, stderr: string) => {
+        (err: NodeJS.ErrnoException, _stdout: string, stderr: string) => {
         if (err) {
           ui.writeLine(stderr);
           ui.writeLine(chalk.red('Package install failed, see above.'));
diff --git a/packages/@angular/cli/tasks/serve.ts b/packages/@angular/cli/tasks/serve.ts
index c78d7728eca6..480a1cc5af33 100644
--- a/packages/@angular/cli/tasks/serve.ts
+++ b/packages/@angular/cli/tasks/serve.ts
@@ -175,8 +175,8 @@ export default Task.extend({
     `));
 
     const server = new WebpackDevServer(webpackCompiler, webpackDevServerConfiguration);
-    return new Promise((resolve, reject) => {
-      server.listen(serveTaskOptions.port, serveTaskOptions.host, (err: any, stats: any) => {
+    return new Promise((_resolve, reject) => {
+      server.listen(serveTaskOptions.port, serveTaskOptions.host, (err: any, _stats: any) => {
         if (err) {
           return reject(err);
         }
diff --git a/packages/@angular/cli/tsconfig.json b/packages/@angular/cli/tsconfig.json
index 3d41dd150a4d..79044077aca0 100644
--- a/packages/@angular/cli/tsconfig.json
+++ b/packages/@angular/cli/tsconfig.json
@@ -8,6 +8,8 @@
     "moduleResolution": "node",
     "noEmitOnError": true,
     "noImplicitAny": true,
+    "noUnusedParameters": true,
+    "noUnusedLocals": true,
     "outDir": "../../../dist/@angular/cli",
     "rootDir": ".",
     "sourceMap": true,
diff --git a/packages/@angular/cli/upgrade/version.ts b/packages/@angular/cli/upgrade/version.ts
index b0b1829163c8..a33e606c760f 100644
--- a/packages/@angular/cli/upgrade/version.ts
+++ b/packages/@angular/cli/upgrade/version.ts
@@ -50,7 +50,7 @@ export class Version {
     try {
       const angularCliPath = resolve.sync('@angular/cli', {
         basedir: process.cwd(),
-        packageFilter: (pkg: any, pkgFile: string) => {
+        packageFilter: (pkg: any, _pkgFile: string) => {
           packageJson = pkg;
         }
       });
diff --git a/packages/@ngtools/json-schema/src/schema-tree.ts b/packages/@ngtools/json-schema/src/schema-tree.ts
index 02b425e2824a..a2b169a736f4 100644
--- a/packages/@ngtools/json-schema/src/schema-tree.ts
+++ b/packages/@ngtools/json-schema/src/schema-tree.ts
@@ -89,7 +89,7 @@ export abstract class SchemaTreeNode<T> implements SchemaNode {
     return this._parent.isChildRequired(this.name);
   }
 
-  isChildRequired(name: string) { return false; }
+  isChildRequired(_name: string) { return false; }
 
   get parent(): SchemaTreeNode<any> { return this._parent; }
   get children(): { [key: string]: SchemaTreeNode<any> } | null { return null; }
@@ -97,13 +97,13 @@ export abstract class SchemaTreeNode<T> implements SchemaNode {
   get itemPrototype(): SchemaTreeNode<any> | null { return null; }
 
   abstract get(): T;
-  set(v: T, init = false, force = false) {
+  set(_v: T, _init = false, _force = false) {
     if (!this.readOnly) {
       throw new MissingImplementationError();
     }
     throw new SettingReadOnlyPropertyError();
   };
-  isCompatible(v: any) { return false; }
+  isCompatible(_v: any) { return false; }
 
   abstract serialize(serializer: Serializer): void;
 
@@ -223,7 +223,7 @@ export class OneOfSchemaTreeNode extends NonLeafSchemaTreeNode<any> {
     this._currentTypeHolder.set(v, false, true);
   }
 
-  set(v: any, init = false, force = false) {
+  set(v: any, _init = false, force = false) {
     return this._set(v, false, force);
   }
 
@@ -334,7 +334,7 @@ export class ArraySchemaTreeNode extends NonLeafSchemaTreeNode<Array<any>> {
       '', undefined, null, metaData.schema['items'], false);
   }
 
-  _set(value: any, init: boolean, force: boolean) {
+  _set(value: any, init: boolean, _force: boolean) {
     const schema = this._schema;
     const forward = this._forward;
 
diff --git a/packages/@ngtools/json-schema/src/serializers/dts.ts b/packages/@ngtools/json-schema/src/serializers/dts.ts
index 15d9ae91646f..454a69f3e437 100644
--- a/packages/@ngtools/json-schema/src/serializers/dts.ts
+++ b/packages/@ngtools/json-schema/src/serializers/dts.ts
@@ -141,24 +141,24 @@ export class DTsSerializer implements Serializer {
     this._writer(')');
   }
 
-  outputValue(node: SchemaNode) {
+  outputValue(_node: SchemaNode) {
     this._willOutputValue();
     this._writer('any');
   }
 
-  outputString(node: SchemaNode) {
+  outputString(_node: SchemaNode) {
     this._willOutputValue();
     this._writer('string');
   }
-  outputNumber(node: SchemaNode) {
+  outputNumber(_node: SchemaNode) {
     this._willOutputValue();
     this._writer('number');
   }
-  outputInteger(node: SchemaNode) {
+  outputInteger(_node: SchemaNode) {
     this._willOutputValue();
     this._writer('number');
   }
-  outputBoolean(node: SchemaNode) {
+  outputBoolean(_node: SchemaNode) {
     this._willOutputValue();
     this._writer('boolean');
   }
diff --git a/packages/@ngtools/json-schema/tsconfig.json b/packages/@ngtools/json-schema/tsconfig.json
index c6d2d354b11c..7bd9a9b450de 100644
--- a/packages/@ngtools/json-schema/tsconfig.json
+++ b/packages/@ngtools/json-schema/tsconfig.json
@@ -7,6 +7,8 @@
     "moduleResolution": "node",
     "noEmitOnError": true,
     "noImplicitAny": true,
+    "noUnusedParameters": true,
+    "noUnusedLocals": true,
     "outDir": "../../../dist/@ngtools/json-schema",
     "rootDir": ".",
     "lib": [
diff --git a/packages/@ngtools/logger/src/logger.ts b/packages/@ngtools/logger/src/logger.ts
index a52418dac3de..ad3381a96075 100644
--- a/packages/@ngtools/logger/src/logger.ts
+++ b/packages/@ngtools/logger/src/logger.ts
@@ -105,9 +105,9 @@ export class Logger extends Observable<LogEntry> {
   subscribe(observer: PartialObserver<LogEntry>): Subscription;
   subscribe(next?: (value: LogEntry) => void, error?: (error: any) => void,
             complete?: () => void): Subscription;
-  subscribe(observerOrNext?: PartialObserver<LogEntry> | ((value: LogEntry) => void),
-            error?: (error: any) => void,
-            complete?: () => void): Subscription {
+  subscribe(_observerOrNext?: PartialObserver<LogEntry> | ((value: LogEntry) => void),
+            _error?: (error: any) => void,
+            _complete?: () => void): Subscription {
     return this._observable.subscribe.apply(this._observable, arguments);
   }
   forEach(next: (value: LogEntry) => void, PromiseCtor?: typeof Promise): Promise<void> {
diff --git a/packages/@ngtools/logger/tsconfig.json b/packages/@ngtools/logger/tsconfig.json
index fbc98879e548..0498a905a9f3 100644
--- a/packages/@ngtools/logger/tsconfig.json
+++ b/packages/@ngtools/logger/tsconfig.json
@@ -7,6 +7,8 @@
     "moduleResolution": "node",
     "noEmitOnError": true,
     "noImplicitAny": true,
+    "noUnusedParameters": true,
+    "noUnusedLocals": true,
     "outDir": "../../../dist/@ngtools/logger",
     "rootDir": ".",
     "lib": [
diff --git a/packages/@ngtools/webpack/src/compiler_host.ts b/packages/@ngtools/webpack/src/compiler_host.ts
index 546ce6f9909e..876744b8070e 100644
--- a/packages/@ngtools/webpack/src/compiler_host.ts
+++ b/packages/@ngtools/webpack/src/compiler_host.ts
@@ -241,7 +241,7 @@ export class WebpackCompilerHost implements ts.CompilerHost {
     return delegated.concat(subdirs);
   }
 
-  getSourceFile(fileName: string, languageVersion: ts.ScriptTarget, onError?: OnErrorFn) {
+  getSourceFile(fileName: string, languageVersion: ts.ScriptTarget, _onError?: OnErrorFn) {
     fileName = this._resolve(fileName);
 
     if (this._files[fileName] == null) {
@@ -265,8 +265,8 @@ export class WebpackCompilerHost implements ts.CompilerHost {
   // This is due to typescript CompilerHost interface being weird on writeFile. This shuts down
   // typings in WebStorm.
   get writeFile() {
-    return (fileName: string, data: string, writeByteOrderMark: boolean,
-            onError?: (message: string) => void, sourceFiles?: ts.SourceFile[]): void => {
+    return (fileName: string, data: string, _writeByteOrderMark: boolean,
+            _onError?: (message: string) => void, _sourceFiles?: ts.SourceFile[]): void => {
       fileName = this._resolve(fileName);
       this._setFileContent(fileName, data);
     };
diff --git a/packages/@ngtools/webpack/src/lazy_routes.ts b/packages/@ngtools/webpack/src/lazy_routes.ts
index 8fee4bfce2f5..c32d396dfc22 100644
--- a/packages/@ngtools/webpack/src/lazy_routes.ts
+++ b/packages/@ngtools/webpack/src/lazy_routes.ts
@@ -4,7 +4,7 @@ import * as ts from 'typescript';
 import {TypeScriptFileRefactor} from './refactor';
 
 
-function _getContentOfKeyLiteral(source: ts.SourceFile, node: ts.Node): string {
+function _getContentOfKeyLiteral(_source: ts.SourceFile, node: ts.Node): string {
   if (node.kind == ts.SyntaxKind.Identifier) {
     return (node as ts.Identifier).text;
   } else if (node.kind == ts.SyntaxKind.StringLiteral) {
diff --git a/packages/@ngtools/webpack/src/loader.ts b/packages/@ngtools/webpack/src/loader.ts
index dce1b0f5342f..8d1751c832fe 100644
--- a/packages/@ngtools/webpack/src/loader.ts
+++ b/packages/@ngtools/webpack/src/loader.ts
@@ -8,7 +8,7 @@ const loaderUtils = require('loader-utils');
 const NormalModule = require('webpack/lib/NormalModule');
 
 
-function _getContentOfKeyLiteral(source: ts.SourceFile, node: ts.Node): string {
+function _getContentOfKeyLiteral(_source: ts.SourceFile, node: ts.Node): string {
   if (!node) {
     return null;
   } else if (node.kind == ts.SyntaxKind.Identifier) {
@@ -21,7 +21,7 @@ function _getContentOfKeyLiteral(source: ts.SourceFile, node: ts.Node): string {
 }
 
 
-function _angularImportsFromNode(node: ts.ImportDeclaration, sourceFile: ts.SourceFile): string[] {
+function _angularImportsFromNode(node: ts.ImportDeclaration, _sourceFile: ts.SourceFile): string[] {
   const ms = node.moduleSpecifier;
   let modulePath: string | null = null;
   switch (ms.kind) {
@@ -250,7 +250,7 @@ function _removeModuleId(refactor: TypeScriptFileRefactor) {
       });
     })
     .forEach((node: ts.ObjectLiteralExpression) => {
-      const moduleIdProp = node.properties.filter((prop: ts.ObjectLiteralElement, idx: number) => {
+      const moduleIdProp = node.properties.filter((prop: ts.ObjectLiteralElement, _idx: number) => {
         return prop.kind == ts.SyntaxKind.PropertyAssignment
             && _getContentOfKeyLiteral(sourceFile, prop.name) == 'moduleId';
       })[0];
@@ -311,22 +311,6 @@ function _replaceResources(refactor: TypeScriptFileRefactor): void {
 }
 
 
-function _checkDiagnostics(refactor: TypeScriptFileRefactor) {
-  const diagnostics: ts.Diagnostic[] = refactor.getDiagnostics();
-
-  if (diagnostics.length > 0) {
-    const message = diagnostics
-      .map(diagnostic => {
-        const {line, character} = diagnostic.file.getLineAndCharacterOfPosition(diagnostic.start);
-        const message = ts.flattenDiagnosticMessageText(diagnostic.messageText, '\n');
-        return `${diagnostic.file.fileName} (${line + 1},${character + 1}): ${message})`;
-      })
-      .join('\n');
-    throw new Error(message);
-  }
-}
-
-
 /**
  * Recursively calls diagnose on the plugins for all the reverse dependencies.
  * @private
diff --git a/packages/@ngtools/webpack/src/plugin.ts b/packages/@ngtools/webpack/src/plugin.ts
index c6e824fcb08b..e95a35116911 100644
--- a/packages/@ngtools/webpack/src/plugin.ts
+++ b/packages/@ngtools/webpack/src/plugin.ts
@@ -278,7 +278,8 @@ export class AotPlugin implements Tapable {
           result.resource = this.skipCodeGeneration ? this.basePath : this.genDir;
           result.recursive = true;
           result.dependencies.forEach((d: any) => d.critical = false);
-          result.resolveDependencies = (p1: any, p2: any, p3: any, p4: RegExp, cb: any ) => {
+          result.resolveDependencies = (_fs: any, _resource: any, _recursive: any,
+            _regExp: RegExp, cb: any) => {
             const dependencies = Object.keys(this._lazyRoutes)
               .map((key) => {
                 const value = this._lazyRoutes[key];
diff --git a/packages/@ngtools/webpack/src/refactor.ts b/packages/@ngtools/webpack/src/refactor.ts
index 1276d9393762..7b11da71d3a1 100644
--- a/packages/@ngtools/webpack/src/refactor.ts
+++ b/packages/@ngtools/webpack/src/refactor.ts
@@ -12,7 +12,7 @@ export interface TranspileOutput {
 }
 
 
-function resolve(filePath: string, host: ts.CompilerHost, program: ts.Program) {
+function resolve(filePath: string, _host: ts.CompilerHost, program: ts.Program) {
   if (path.isAbsolute(filePath)) {
     return filePath;
   }
@@ -37,7 +37,7 @@ export class TypeScriptFileRefactor {
   get sourceText() { return this._sourceString.toString(); }
 
   constructor(fileName: string,
-              private _host: ts.CompilerHost,
+              _host: ts.CompilerHost,
               private _program?: ts.Program) {
     fileName = resolve(fileName, _host, _program).replace(/\\/g, '/');
     this._fileName = fileName;
diff --git a/packages/@ngtools/webpack/src/resource_loader.ts b/packages/@ngtools/webpack/src/resource_loader.ts
index a1db3347476e..d528871320db 100644
--- a/packages/@ngtools/webpack/src/resource_loader.ts
+++ b/packages/@ngtools/webpack/src/resource_loader.ts
@@ -18,7 +18,7 @@ export class WebpackResourceLoader implements ResourceLoader {
     this._context = _parentCompilation.context;
   }
 
-  private _compile(filePath: string, content: string): Promise<any> {
+  private _compile(filePath: string, _content: string): Promise<any> {
     const compilerName = `compiler(${this._uniqueId++})`;
     const outputOptions = { filename: filePath };
     const relativePath = path.relative(this._context || '', filePath);
diff --git a/packages/@ngtools/webpack/tsconfig.json b/packages/@ngtools/webpack/tsconfig.json
index 77eea1896f53..eba1a266c139 100644
--- a/packages/@ngtools/webpack/tsconfig.json
+++ b/packages/@ngtools/webpack/tsconfig.json
@@ -7,6 +7,8 @@
     "moduleResolution": "node",
     "noEmitOnError": true,
     "noImplicitAny": true,
+    "noUnusedParameters": true,
+    "noUnusedLocals": true,
     "outDir": "../../../dist/@ngtools/webpack",
     "rootDir": ".",
     "lib": [