diff --git a/.babelrc b/.babelrc
new file mode 100644
index 0000000000..3c078e9f99
--- /dev/null
+++ b/.babelrc
@@ -0,0 +1,5 @@
+{
+  "presets": [
+    "es2015"
+  ]
+}
diff --git a/.bowerrc b/.bowerrc
deleted file mode 100644
index 69fad35801..0000000000
--- a/.bowerrc
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "directory": "bower_components"
-}
diff --git a/.eslintrc b/.eslintrc
index 95a8def2e9..30a5994f7a 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -10,6 +10,7 @@
     "node": true,
     "amd": true
   },
+  "parser": "babel-eslint",
   "rules": {
     "no-console": 0
   }
diff --git a/assets/manifest.json b/assets/manifest.json
deleted file mode 100644
index aca495c846..0000000000
--- a/assets/manifest.json
+++ /dev/null
@@ -1,27 +0,0 @@
-{
-  "dependencies": {
-    "main.js": {
-      "files": [
-        "scripts/main.js"
-      ],
-      "main": true
-    },
-    "main.css": {
-      "files": [
-        "styles/main.scss"
-      ],
-      "main": true
-    },
-    "customizer.js": {
-      "files": [
-        "scripts/customizer.js"
-      ]
-    },
-    "jquery.js": {
-      "bower": ["jquery"]
-    }
-  },
-  "config": {
-    "devUrl": "http://example.dev"
-  }
-}
diff --git a/assets/scripts/main.js b/assets/scripts/main.js
index 53062de700..1039fa2603 100644
--- a/assets/scripts/main.js
+++ b/assets/scripts/main.js
@@ -1,77 +1,51 @@
-/* ========================================================================
- * DOM-based Routing
- * Based on http://goo.gl/EUTi53 by Paul Irish
- *
- * Only fires on body classes that match. If a body class contains a dash,
- * replace the dash with an underscore when adding it to the object below.
- *
- * .noConflict()
- * The routing is enclosed within an anonymous function so that you can
- * always reference jQuery with $, even when in .noConflict() mode.
- * ======================================================================== */
-
-(function($) {
-
-  // Use this variable to set up the common and page specific functions. If you
-  // rename this variable, you will also need to rename the namespace below.
-  var Sage = {
-    // All pages
-    'common': {
-      init: function() {
-        // JavaScript to be fired on all pages
-      },
-      finalize: function() {
-        // JavaScript to be fired on all pages, after page specific JS is fired
-      }
-    },
-    // Home page
-    'home': {
-      init: function() {
-        // JavaScript to be fired on the home page
-      },
-      finalize: function() {
-        // JavaScript to be fired on the home page, after the init JS
-      }
+import "../styles/main.scss";
+
+import $ from 'jquery';
+import Router from './util/router';
+
+// Import Bootstrap
+import "bootstrap/dist/js/umd/util.js";
+import "bootstrap/dist/js/umd/alert.js";
+import "bootstrap/dist/js/umd/button.js";
+import "bootstrap/dist/js/umd/carousel.js";
+import "bootstrap/dist/js/umd/collapse.js";
+import "bootstrap/dist/js/umd/dropdown.js";
+import "bootstrap/dist/js/umd/modal.js";
+import "bootstrap/dist/js/umd/scrollspy.js";
+import "bootstrap/dist/js/umd/tab.js";
+import "bootstrap/dist/js/umd/tooltip.js";
+import "bootstrap/dist/js/umd/popover.js";
+
+// Use this variable to set up the common and page specific functions. If you
+// rename this variable, you will also need to rename the namespace below.
+var Sage = {
+  // All pages
+  'common': {
+    init: function() {
+      // JavaScript to be fired on all pages
     },
-    // About us page, note the change from about-us to about_us.
-    'about_us': {
-      init: function() {
-        // JavaScript to be fired on the about us page
-      }
+    finalize: function() {
+      // JavaScript to be fired on all pages, after page specific JS is fired
     }
-  };
-
-  // The routing fires all common scripts, followed by the page specific scripts.
-  // Add additional events for more control over timing e.g. a finalize event
-  var UTIL = {
-    fire: function(func, funcname, args) {
-      var fire;
-      var namespace = Sage;
-      funcname = (funcname === undefined) ? 'init' : funcname;
-      fire = func !== '';
-      fire = fire && namespace[func];
-      fire = fire && typeof namespace[func][funcname] === 'function';
-
-      if (fire) {
-        namespace[func][funcname](args);
-      }
+  },
+  // Home page
+  'home': {
+    init: function() {
+      // JavaScript to be fired on the home page
     },
-    loadEvents: function() {
-      // Fire common init JS
-      UTIL.fire('common');
-
-      // Fire page-specific init JS, and then finalize JS
-      $.each(document.body.className.replace(/-/g, '_').split(/\s+/), function(i, classnm) {
-        UTIL.fire(classnm);
-        UTIL.fire(classnm, 'finalize');
-      });
-
-      // Fire common finalize JS
-      UTIL.fire('common', 'finalize');
+    finalize: function() {
+      // JavaScript to be fired on the home page, after the init JS
     }
-  };
-
-  // Load Events
-  $(document).ready(UTIL.loadEvents);
+  },
+  // About us page, note the change from about-us to about_us.
+  'about_us': {
+    init: function() {
+      // JavaScript to be fired on the about us page
+    }
+  }
+};
 
-})(jQuery); // Fully reference jQuery after this point.
+// Load Events
+$(document).ready(function () {
+  new Router(Sage).loadEvents();
+});
diff --git a/assets/scripts/util/router.js b/assets/scripts/util/router.js
new file mode 100644
index 0000000000..ca9694ecc5
--- /dev/null
+++ b/assets/scripts/util/router.js
@@ -0,0 +1,45 @@
+import $ from 'jquery';
+
+/* ========================================================================
+ * DOM-based Routing
+ * Based on http://goo.gl/EUTi53 by Paul Irish
+ *
+ * Only fires on body classes that match. If a body class contains a dash,
+ * replace the dash with an underscore when adding it to the object below.
+ * ======================================================================== */
+
+// The routing fires all common scripts, followed by the page specific scripts.
+// Add additional events for more control over timing e.g. a finalize event
+export default class Router {
+  constructor(namespace) {
+    this.namespace = namespace;
+  }
+
+  fire(func, funcname, args) {
+    funcname = (funcname === undefined) ? 'init' : funcname;
+    let fire = func !== '';
+    fire = fire && this.namespace[func];
+    fire = fire && typeof this.namespace[func][funcname] === 'function';
+
+    if (fire) {
+      this.namespace[func][funcname](args);
+    }
+  }
+
+  loadEvents() {
+    // Fire common init JS
+    this.fire('common');
+
+    // Fire page-specific init JS, and then finalize JS
+    $.each(
+      document.body.className.replace(/-/g, '_').split(/\s+/),
+      (i, className) => {
+        this.fire(className);
+        this.fire(className, 'finalize');
+      }
+    );
+
+    // Fire common finalize JS
+    this.fire('common', 'finalize');
+  }
+}
diff --git a/assets/styles/components/_grid.scss b/assets/styles/components/_grid.scss
index 77c019e873..fb3e829a3c 100644
--- a/assets/styles/components/_grid.scss
+++ b/assets/styles/components/_grid.scss
@@ -1,15 +1,18 @@
 // Grid system
 .main {
-  @include make-col($main-sm-columns, $main-sm-columns, $grid-gutter-width);
+  @include make-col();
 
   @include media-breakpoint-up(sm) {
+    @include make-col-span($main-sm-columns);
     .sidebar-primary & {
-      @include make-col($main-sm-columns - $sidebar-sm-columns, $main-sm-columns, $grid-gutter-width);
+      @include make-col-span($main-sm-columns - $sidebar-sm-columns);
     }
   }
 }
 .sidebar {
+  @include make-col();
+
   @include media-breakpoint-up(sm) {
-    @include make-col($sidebar-sm-columns, $main-sm-columns, $grid-gutter-width);
+    @include make-col-span($sidebar-sm-columns);
   }
 }
diff --git a/assets/styles/main.scss b/assets/styles/main.scss
index 7ae1198a85..e91ca6fdd4 100644
--- a/assets/styles/main.scss
+++ b/assets/styles/main.scss
@@ -1,9 +1,7 @@
 @import "common/variables";
 
-// Automatically injected Bower dependencies via wiredep (never manually edit this block)
-// bower:scss
-@import "../../bower_components/bootstrap/scss/bootstrap.scss";
-// endbower
+// Import Boostrap from node_modules/...
+@import "~bootstrap/scss/bootstrap";
 
 @import "common/global";
 @import "components/buttons";
diff --git a/bower.json b/bower.json
deleted file mode 100644
index 6f90838f7b..0000000000
--- a/bower.json
+++ /dev/null
@@ -1,13 +0,0 @@
-{
-  "name": "sage",
-  "homepage": "https://roots.io/sage/",
-  "authors": [
-    "Roots <team@roots.io>"
-  ],
-  "license": "MIT",
-  "private": true,
-  "dependencies": {
-    "bootstrap": "git://github.com/twbs/bootstrap.git#v4-dev",
-    "tether": "^1.1.1"
-  }
-}
diff --git a/dev.js b/dev.js
new file mode 100644
index 0000000000..8a473b918f
--- /dev/null
+++ b/dev.js
@@ -0,0 +1,30 @@
+/* eslint no-console: 0 */
+
+var webpack = require('webpack'),
+    webpackDevMiddleware = require('webpack-dev-middleware'),
+    webpackHotMiddleware = require('webpack-hot-middleware'),
+    browserSync = require('browser-sync');
+
+var devBuildConfig = require('./webpack.config'),
+    compiler = webpack(devBuildConfig);
+
+browserSync.init({
+  proxy: {
+    target: 'http://example.dev', // change to dev server
+    middleware: [
+      webpackDevMiddleware(compiler, {
+        publicPath: devBuildConfig.output.publicPath,
+        stats: {
+          colors: true
+        },
+      }),
+      webpackHotMiddleware(compiler, {
+        log: browserSync.notify
+      })
+    ]
+  },
+  files: [
+    'templates/**/*.php',
+    'src/**/*.php'
+  ]
+});
diff --git a/gulpfile.js b/gulpfile.js
deleted file mode 100644
index 6c6874a1be..0000000000
--- a/gulpfile.js
+++ /dev/null
@@ -1,288 +0,0 @@
-// ## Globals
-var argv         = require('minimist')(process.argv.slice(2));
-var autoprefixer = require('gulp-autoprefixer');
-var browserSync  = require('browser-sync').create();
-var changed      = require('gulp-changed');
-var concat       = require('gulp-concat');
-var flatten      = require('gulp-flatten');
-var gulp         = require('gulp');
-var gulpif       = require('gulp-if');
-var imagemin     = require('gulp-imagemin');
-var eslint       = require('gulp-eslint');
-var lazypipe     = require('lazypipe');
-var less         = require('gulp-less');
-var merge        = require('merge-stream');
-var cssNano      = require('gulp-cssnano');
-var plumber      = require('gulp-plumber');
-var rev          = require('gulp-rev');
-var runSequence  = require('run-sequence');
-var sass         = require('gulp-sass');
-var sourcemaps   = require('gulp-sourcemaps');
-var uglify       = require('gulp-uglify');
-
-// See https://github.com/austinpray/asset-builder
-var manifest = require('asset-builder')('./assets/manifest.json');
-
-// `path` - Paths to base asset directories. With trailing slashes.
-// - `path.source` - Path to the source files. Default: `assets/`
-// - `path.dist` - Path to the build directory. Default: `dist/`
-var path = manifest.paths;
-
-// `config` - Store arbitrary configuration values here.
-var config = manifest.config || {};
-
-// `globs` - These ultimately end up in their respective `gulp.src`.
-// - `globs.js` - Array of asset-builder JS dependency objects. Example:
-//   ```
-//   {type: 'js', name: 'main.js', globs: []}
-//   ```
-// - `globs.css` - Array of asset-builder CSS dependency objects. Example:
-//   ```
-//   {type: 'css', name: 'main.css', globs: []}
-//   ```
-// - `globs.fonts` - Array of font path globs.
-// - `globs.images` - Array of image path globs.
-// - `globs.bower` - Array of all the main Bower files.
-var globs = manifest.globs;
-
-// `project` - paths to first-party assets.
-// - `project.js` - Array of first-party JS assets.
-// - `project.css` - Array of first-party CSS assets.
-var project = manifest.getProjectGlobs();
-
-// CLI options
-var enabled = {
-  // Enable static asset revisioning when `--production`
-  rev: argv.production,
-  // Disable source maps when `--production`
-  maps: !argv.production,
-  // Fail styles task on error when `--production`
-  failStyleTask: argv.production,
-  // Fail due to ESLint warnings only when `--production`
-  failESLint: argv.production,
-  // Strip debug statments from javascript when `--production`
-  stripJSDebug: argv.production
-};
-
-// Path to the compiled assets manifest in the dist directory
-var revManifest = path.dist + 'assets.json';
-
-// ## Reusable Pipelines
-// See https://github.com/OverZealous/lazypipe
-
-// ### CSS processing pipeline
-// Example
-// ```
-// gulp.src(cssFiles)
-//   .pipe(cssTasks('main.css')
-//   .pipe(gulp.dest(path.dist + 'styles'))
-// ```
-var cssTasks = function(filename) {
-  return lazypipe()
-    .pipe(function() {
-      return gulpif(!enabled.failStyleTask, plumber());
-    })
-    .pipe(function() {
-      return gulpif(enabled.maps, sourcemaps.init());
-    })
-    .pipe(function() {
-      return gulpif('*.less', less());
-    })
-    .pipe(function() {
-      return gulpif('*.scss', sass({
-        outputStyle: 'nested', // libsass doesn't support expanded yet
-        precision: 10,
-        includePaths: ['.'],
-        errLogToConsole: !enabled.failStyleTask
-      }));
-    })
-    .pipe(concat, filename)
-    .pipe(autoprefixer, {
-      browsers: [
-        'last 2 versions',
-        'android 4',
-        'opera 12'
-      ]
-    })
-    .pipe(cssNano, {
-      safe: true
-    })
-    .pipe(function() {
-      return gulpif(enabled.rev, rev());
-    })
-    .pipe(function() {
-      return gulpif(enabled.maps, sourcemaps.write('.', {
-        sourceRoot: 'assets/styles/'
-      }));
-    })();
-};
-
-// ### JS processing pipeline
-// Example
-// ```
-// gulp.src(jsFiles)
-//   .pipe(jsTasks('main.js')
-//   .pipe(gulp.dest(path.dist + 'scripts'))
-// ```
-var jsTasks = function(filename) {
-  return lazypipe()
-    .pipe(function() {
-      return gulpif(enabled.maps, sourcemaps.init());
-    })
-    .pipe(concat, filename)
-    .pipe(uglify, {
-      compress: {
-        'drop_debugger': enabled.stripJSDebug
-      }
-    })
-    .pipe(function() {
-      return gulpif(enabled.rev, rev());
-    })
-    .pipe(function() {
-      return gulpif(enabled.maps, sourcemaps.write('.', {
-        sourceRoot: 'assets/scripts/'
-      }));
-    })();
-};
-
-// ### Write to rev manifest
-// If there are any revved files then write them to the rev manifest.
-// See https://github.com/sindresorhus/gulp-rev
-var writeToManifest = function(directory) {
-  return lazypipe()
-    .pipe(gulp.dest, path.dist + directory)
-    .pipe(browserSync.stream, {match: '**/*.{js,css}'})
-    .pipe(rev.manifest, revManifest, {
-      base: path.dist,
-      merge: true
-    })
-    .pipe(gulp.dest, path.dist)();
-};
-
-// ## Gulp tasks
-// Run `gulp -T` for a task summary
-
-// ### Styles
-// `gulp styles` - Compiles, combines, and optimizes Bower CSS and project CSS.
-// By default this task will only log a warning if a precompiler error is
-// raised. If the `--production` flag is set: this task will fail outright.
-gulp.task('styles', ['wiredep'], function() {
-  var merged = merge();
-  manifest.forEachDependency('css', function(dep) {
-    var cssTasksInstance = cssTasks(dep.name);
-    if (!enabled.failStyleTask) {
-      cssTasksInstance.on('error', function(err) {
-        console.error(err.message);
-        this.emit('end');
-      });
-    }
-    merged.add(gulp.src(dep.globs, {base: 'styles'})
-      .pipe(cssTasksInstance));
-  });
-  return merged
-    .pipe(writeToManifest('styles'));
-});
-
-// ### Scripts
-// `gulp scripts` - Runs ESLint then compiles, combines, and optimizes Bower JS
-// and project JS.
-gulp.task('scripts', ['lint'], function() {
-  var merged = merge();
-  manifest.forEachDependency('js', function(dep) {
-    merged.add(
-      gulp.src(dep.globs, {base: 'scripts'})
-        .pipe(jsTasks(dep.name))
-    );
-  });
-  return merged
-    .pipe(writeToManifest('scripts'));
-});
-
-// ### Fonts
-// `gulp fonts` - Grabs all the fonts and outputs them in a flattened directory
-// structure. See: https://github.com/armed/gulp-flatten
-gulp.task('fonts', function() {
-  return gulp.src(globs.fonts)
-    .pipe(flatten())
-    .pipe(gulp.dest(path.dist + 'fonts'))
-    .pipe(browserSync.stream());
-});
-
-// ### Images
-// `gulp images` - Run lossless compression on all the images.
-gulp.task('images', function() {
-  return gulp.src(globs.images)
-    .pipe(imagemin({
-      progressive: true,
-      interlaced: true,
-      svgoPlugins: [{removeUnknownsAndDefaults: false}, {cleanupIDs: false}]
-    }))
-    .pipe(gulp.dest(path.dist + 'images'))
-    .pipe(browserSync.stream());
-});
-
-// ### ESLint
-// `gulp lint` - Lints configuration JSON and project JS.
-gulp.task('lint', function() {
-  return gulp.src([
-    'gulpfile.js'
-  ].concat(project.js))
-    .pipe(eslint())
-    .pipe(eslint.format())
-    .pipe(gulpif(enabled.failESLint, eslint.failAfterError()));
-});
-
-// ### Clean
-// `gulp clean` - Deletes the build folder entirely.
-gulp.task('clean', require('del').bind(null, [path.dist]));
-
-// ### Watch
-// `gulp watch` - Use BrowserSync to proxy your dev server and synchronize code
-// changes across devices. Specify the hostname of your dev server at
-// `manifest.config.devUrl`. When a modification is made to an asset, run the
-// build step for that asset and inject the changes into the page.
-// See: http://www.browsersync.io
-gulp.task('watch', function() {
-  browserSync.init({
-    files: ['{src,templates}/**/*.php'],
-    proxy: config.devUrl,
-    snippetOptions: {
-      whitelist: ['/wp-admin/admin-ajax.php'],
-      blacklist: ['/wp-admin/**']
-    }
-  });
-  gulp.watch([path.source + 'styles/**/*'], ['styles']);
-  gulp.watch([path.source + 'scripts/**/*'], ['lint', 'scripts']);
-  gulp.watch([path.source + 'fonts/**/*'], ['fonts']);
-  gulp.watch([path.source + 'images/**/*'], ['images']);
-  gulp.watch(['bower.json', 'assets/manifest.json'], ['build']);
-});
-
-// ### Build
-// `gulp build` - Run all the build tasks but don't clean up beforehand.
-// Generally you should be running `gulp` instead of `gulp build`.
-gulp.task('build', function(callback) {
-  runSequence('styles',
-              'scripts',
-              ['fonts', 'images'],
-              callback);
-});
-
-// ### Wiredep
-// `gulp wiredep` - Automatically inject Less and Sass Bower dependencies. See
-// https://github.com/taptapship/wiredep
-gulp.task('wiredep', function() {
-  var wiredep = require('wiredep').stream;
-  return gulp.src(project.css)
-    .pipe(wiredep())
-    .pipe(changed(path.source + 'styles', {
-      hasChanged: changed.compareSha1Digest
-    }))
-    .pipe(gulp.dest(path.source + 'styles'));
-});
-
-// ### Gulp
-// `gulp` - Run a complete build. To compile for production run `gulp --production`.
-gulp.task('default', ['clean'], function() {
-  gulp.start('build');
-});
diff --git a/package.json b/package.json
index 02769e5ec7..1d471f4f96 100644
--- a/package.json
+++ b/package.json
@@ -18,45 +18,52 @@
     }
   ],
   "scripts": {
-    "build": "bower install && gulp",
-    "lint": "gulp lint"
+    "build:production": "export SAGE_ENV=production && webpack",
+    "build": "export SAGE_ENV=development && webpack",
+    "watch": "export SAGE_ENV=development && node dev.js"
   },
   "engines": {
     "node": ">= 0.12.0",
     "npm": ">=2.1.5"
   },
   "devDependencies": {
-    "asset-builder": "^1.1.0",
-    "browser-sync": "^2.10.1",
-    "del": "^2.2.0",
-    "gulp": "^3.9.0",
-    "gulp-autoprefixer": "^3.1.0",
-    "gulp-changed": "^1.3.0",
-    "gulp-concat": "^2.6.0",
-    "gulp-cssnano": "^2.1.0",
-    "gulp-eslint": "^1.1.1",
-    "gulp-flatten": "0.2.0",
-    "gulp-if": "^2.0.0",
-    "gulp-imagemin": "^2.4.0",
-    "gulp-less": "^3.0.5",
-    "gulp-cssnano": "^2.1.0",
-    "gulp-eslint": "^1.1.1",
-    "gulp-flatten": "0.2.0",
-    "gulp-if": "^2.0.0",
-    "gulp-imagemin": "^2.4.0",
-    "gulp-less": "^3.0.5",
-    "gulp-plumber": "^1.0.1",
-    "gulp-rename": "^1.2.2",
-    "gulp-rev": "^6.0.1",
-    "gulp-sass": "^2.1.1",
-    "gulp-sourcemaps": "^1.6.0",
-    "gulp-uglify": "^1.5.1",
+    "assets-webpack-plugin": "^3.3.0",
+    "autoprefixer": "^6.1.0",
+    "babel-cli": "^6.1.18",
+    "babel-core": "^6.1.20",
+    "babel-eslint": "^5.0.0",
+    "babel-loader": "^6.1.0",
+    "babel-preset-es2015": "^6.1.18",
+    "babel-register": "^6.5.2",
+    "body-parser": "^1.14.1",
+    "browser-sync": "^2.11.1",
+    "clean-webpack-plugin": "^0.1.3",
+    "css-loader": "^0.22.0",
+    "cssnano": "^3.5.2",
+    "eslint": "^1.9.0",
+    "eslint-config-airbnb": "^1.0.0",
+    "eslint-loader": "^1.3.0",
+    "extract-text-webpack-plugin": "^0.9.1",
+    "file-loader": "^0.8.5",
     "imagemin-pngcrush": "^4.1.0",
-    "lazypipe": "^1.0.1",
-    "merge-stream": "^1.0.0",
-    "minimist": "^1.2.0",
-    "run-sequence": "^1.1.5",
-    "traverse": "^0.6.6",
-    "wiredep": "^3.0.0"
+    "imports-loader": "^0.6.5",
+    "monkey-hot-loader": "0.0.3",
+    "node-sass": "^3.4.2",
+    "optimize-css-assets-webpack-plugin": "^1.3.0",
+    "postcss": "^5.0.18",
+    "postcss-loader": "^0.8.0",
+    "resolve-url-loader": "^1.4.3",
+    "sass-loader": "^3.1.1",
+    "style-loader": "^0.13.0",
+    "url-loader": "^0.5.7",
+    "webpack": "^1.12.4",
+    "webpack-dev-middleware": "^1.2.0",
+    "webpack-hot-middleware": "^2.5.0"
+  },
+  "dependencies": {
+    "babel-runtime": "^6.5.0",
+    "bootstrap": "github:twbs/bootstrap#v4.0.0-alpha.2",
+    "jquery": "^2.1.4",
+    "tether": "^1.2.0"
   }
 }
diff --git a/src/admin.php b/src/admin.php
index 863a6ced6d..0313e8cfaf 100644
--- a/src/admin.php
+++ b/src/admin.php
@@ -12,5 +12,5 @@
  * Customizer JS
  */
 add_action('customize_preview_init', function () {
-    wp_enqueue_script('sage/customizer.js', asset_path('scripts/customizer.js'), ['customize-preview'], null, true);
+    wp_enqueue_script('sage/customizer.js', asset_path('customizer.js'), ['customize-preview'], null, true);
 });
diff --git a/src/setup.php b/src/setup.php
old mode 100644
new mode 100755
index 0d8c8f6e20..7f32f0cec4
--- a/src/setup.php
+++ b/src/setup.php
@@ -6,8 +6,8 @@
  * Theme assets
  */
 add_action('wp_enqueue_scripts', function () {
-    wp_enqueue_style('sage/main.css', asset_path('styles/main.css'), false, null);
-    wp_enqueue_script('sage/main.js', asset_path('scripts/main.js'), ['jquery'], null, true);
+    wp_enqueue_style('sage/main.css', asset_path('main.css'), false, null);
+    wp_enqueue_script('sage/main.js', asset_path('main.js'), ['jquery'], null, true);
 }, 100);
 
 /**
@@ -62,7 +62,7 @@
      * Use main stylesheet for visual editor
      * @see assets/styles/layouts/_tinymce.scss
      */
-    add_editor_style(asset_path('styles/main.css'));
+    add_editor_style(asset_path('main.css'));
 });
 
 /**
diff --git a/webpack.config.js b/webpack.config.js
new file mode 100644
index 0000000000..ef2b6fa1c6
--- /dev/null
+++ b/webpack.config.js
@@ -0,0 +1,142 @@
+var webpack = require('webpack'),
+    path = require('path'),
+    autoprefixer = require('autoprefixer'),
+    Clean = require("clean-webpack-plugin"),
+    AssetsPlugin = require('assets-webpack-plugin'),
+    ExtractTextPlugin = require('extract-text-webpack-plugin'),
+    OptimizeCssAssetsPlugin = require('optimize-css-assets-webpack-plugin'),
+    cssnano = require('cssnano');
+
+var SAGE_ENV = process.env.SAGE_ENV || 'development',
+    webpackConfig;
+
+var sage = {
+  publicPath: '/app/themes/sage/dist/',
+  dist: path.join(__dirname, 'dist'),
+  manifest: 'assets.json',
+  // set to true to extract css in dev mode (prevents "hot" update)
+  extractStyles: false
+};
+
+// format output for Sage : { "name.ext": "hash.ext" }
+var assetsPluginProcessOutput = function (assets) {
+  var results = {},
+      name,
+      ext;
+
+  for (name in assets) {
+    if (assets.hasOwnProperty(name)) {
+      for (ext in assets[name]) {
+        if (assets[name].hasOwnProperty(ext)) {
+          results[name + '.' + ext] = assets[name][ext];
+        }
+      }
+    }
+  }
+  return JSON.stringify(results);
+}
+
+webpackConfig = {
+  entry: {
+    main: [
+      './assets/scripts/main'
+    ],
+    customizer: [
+      './assets/scripts/customizer'
+    ]
+  },
+  output: {
+    path: sage.dist,
+    publicPath: sage.publicPath
+  },
+  module: {
+    preLoaders: [
+      {
+        test: /\.jsx?$/,
+        exclude: /node_modules/,
+        loader: 'eslint'
+      }
+    ],
+    loaders: [
+      {
+        test: /\.js$/,
+        exclude: /node_modules/,
+        loaders: ['monkey-hot', 'babel']
+      },
+      {
+        test: /\.css$/,
+        exclude: /node_modules/,
+        loader: ExtractTextPlugin.extract('style', 'css?sourceMap!postcss')
+      },
+      {
+        test: /\.scss$/,
+        exclude: /node_modules/,
+        loader: ExtractTextPlugin.extract('style', 'css?sourceMap!postcss!sass?sourceMap')
+      },
+      {
+        test: /\.(ttf|eot|svg)$/,
+        loader: 'url?limit=10000'
+      },
+      {
+        test: /\.woff(2)?(\?v=[0-9]\.[0-9]\.[0-9])?$/,
+        loader: 'url?limit=10000&mimetype=application/font-woff'
+      },
+      {
+        test: /\.(png|jpg|jpeg|gif)(\?v=[0-9]\.[0-9]\.[0-9])?$/,
+        loader: 'file-loader'
+      }
+    ],
+  },
+  resolve: { extensions: [ '', '.js', '.json' ] },
+  externals: {
+    jquery: 'jQuery'
+  },
+  plugins: [
+    new Clean([sage.dist]),
+    new webpack.ProvidePlugin({
+      $: 'jquery',
+      jQuery: 'jquery',
+      'window.jQuery': 'jquery',
+      'window.Tether': 'tether'
+    }),
+    new AssetsPlugin({
+      path: sage.dist,
+      filename: sage.manifest,
+      fullPath: false,
+      processOutput: assetsPluginProcessOutput,
+    })
+  ],
+  postcss: [ autoprefixer ],
+  eslint: {
+    failOnWarning: false,
+    failOnError: true,
+  }
+};
+
+if ( SAGE_ENV === 'development' ) {
+  // development
+  webpackConfig.entry.main.push('webpack-hot-middleware/client?reload=true');
+  webpackConfig.entry.customizer.push('webpack-hot-middleware/client?reload=true');
+  webpackConfig.output.filename = '[name].js';
+  webpackConfig.output.sourceMapFilename = '[file].map';
+  webpackConfig.output.pathinfo = true;
+  webpackConfig.debug = true;
+  webpackConfig.devtool = '#cheap-module-source-map';
+  webpackConfig.plugins.push(new webpack.optimize.OccurenceOrderPlugin());
+  webpackConfig.plugins.push(new webpack.HotModuleReplacementPlugin());
+  webpackConfig.plugins.push(new webpack.NoErrorsPlugin());
+  webpackConfig.plugins.push(new ExtractTextPlugin('[name].css', { disable: !sage.extractStyles }));
+} else {
+  // production
+  webpackConfig.output.filename = '[name].[hash].js';
+  webpackConfig.output.sourceMapFilename = '[file].[hash].map';
+  webpackConfig.plugins.push(new ExtractTextPlugin('[name].[hash].css'));
+  webpackConfig.plugins.push(new webpack.optimize.UglifyJsPlugin());
+  webpackConfig.plugins.push(new OptimizeCssAssetsPlugin({
+    cssProcessor: cssnano,
+    cssProcessorOptions: { discardComments: { removeAll: true } },
+    canPrint: true
+  }));
+}
+
+module.exports = webpackConfig;