diff --git a/core/modules/block_place/block_place.libraries.yml b/core/modules/block_place/block_place.libraries.yml
index 0671252..7d19419 100644
--- a/core/modules/block_place/block_place.libraries.yml
+++ b/core/modules/block_place/block_place.libraries.yml
@@ -9,3 +9,11 @@ drupal.block_place.icons:
   css:
     theme:
       css/block-place.icons.theme.css: {}
+
+drupal.block_place.js:
+  version: VERSION
+  js:
+    js/block_place.js: {}
+  dependencies:
+    - outside_in/ drupal.outside_in
+
diff --git a/core/modules/block_place/block_place.module b/core/modules/block_place/block_place.module
index 7fe86a6..9083f75 100644
--- a/core/modules/block_place/block_place.module
+++ b/core/modules/block_place/block_place.module
@@ -82,3 +82,22 @@ function block_place_toolbar() {
   ];
   return $items;
 }
+
+/**
+ * Implements hook_page_top().
+ *
+ * Add block place library if dialog should be open to sort blocks.
+ */
+function block_place_page_top(array &$page_top) {
+  if ($region_sort = \Drupal::request()->query->get('region_sort')) {
+    $page_top['#attached']['library'][] = 'block_place/drupal.block_place.js';
+    $destination = \Drupal::destination()->get();
+    $destination = explode('?', $destination)[0];
+    $url = Url::fromRoute('block_place.admin_display', ['region' => $region_sort], ['query' => ['destination' => $destination]]);
+    $page_top['#attached']['drupalSettings']['block_place'] = [
+      'dialog_url' => $url->setAbsolute()->toString(),
+      'dialog_type' => \Drupal::moduleHandler()->moduleExists('outside_in') ? 'dialog_offcanvas' : 'modal',
+    ];
+  }
+}
+
diff --git a/core/modules/block_place/block_place.routing.yml b/core/modules/block_place/block_place.routing.yml
new file mode 100644
index 0000000..9c4a4d8
--- /dev/null
+++ b/core/modules/block_place/block_place.routing.yml
@@ -0,0 +1,15 @@
+block_place.admin_library:
+  path: 'admin/structure/block-place/library/{theme}'
+  defaults:
+    _controller: '\Drupal\block_place\Controller\PlaceBlockLibraryController::listBlocks'
+    _title: 'Place block'
+  requirements:
+    _access_theme: 'TRUE'
+    _permission: 'administer blocks'
+block_place.admin_display:
+  path: 'admin/structure/block-place/{region}'
+  defaults:
+    _controller: '\Drupal\block_place\Controller\BlockPlaceListController::listing'
+    _title: 'Order Blocks'
+  requirements:
+    _permission: 'administer blocks'
diff --git a/core/modules/block_place/js/block_place.js b/core/modules/block_place/js/block_place.js
new file mode 100644
index 0000000..140b7c5
--- /dev/null
+++ b/core/modules/block_place/js/block_place.js
@@ -0,0 +1,29 @@
+/**
+ * @file
+ * Block Place behaviors.
+ */
+
+(function ($, window, Drupal, drupalSettings) {
+
+  'use strict';
+
+  Drupal.behaviors.blockPlace = {
+    attach: function (context, settings) {
+      // If drupalSettings.block_place is set open open dialog.
+      if (drupalSettings.hasOwnProperty('block_place') && drupalSettings.block_place.hasOwnProperty('dialog_url')) {
+        $(window).once('block_sort').each(function () {
+          var blockSort = Drupal.ajax({
+            dialog: {},
+            dialogType: drupalSettings.block_place.dialog_type,
+            selector: '.ckeditor-dialog-loading-link',
+            url: drupalSettings.block_place.dialog_url,
+            progress: {type: 'throbber'}
+          });
+          blockSort.execute();
+        });
+      }
+
+    }
+  };
+
+})(jQuery, window, Drupal, drupalSettings);
diff --git a/core/modules/block_place/src/Controller/BlockPlaceListController.php b/core/modules/block_place/src/Controller/BlockPlaceListController.php
new file mode 100644
index 0000000..00e6384
--- /dev/null
+++ b/core/modules/block_place/src/Controller/BlockPlaceListController.php
@@ -0,0 +1,55 @@
+<?php
+
+namespace Drupal\block_place\Controller;
+
+use Drupal\block\Controller\BlockListController;
+use Drupal\Core\Render\Element;
+use Symfony\Component\HttpFoundation\Request;
+
+/**
+ * Defines a controller to list blocks in sort blocks dialog.
+ */
+class BlockPlaceListController extends BlockListController {
+
+  /**
+   * {@inheritdoc}
+   *
+   * @param string $region
+   *   The region to be sorted.
+   */
+  public function listing($theme = NULL, Request $request = NULL, $region = NULL) {
+    $rendered = parent::listing($theme, $request);
+    unset($rendered['blocks']['#header'][2], $rendered['blocks']['#header'][4]);
+    foreach (Element::children($rendered['blocks']) as $key) {
+      if (strstr($key, 'region-')) {
+        if ($key !== "region-$region" && $key !== "region-$region-message") {
+          unset($rendered['blocks'][$key]);
+        }
+      }
+      else {
+        if ($rendered['blocks'][$key]['region-theme']['region']['#value'] !== $region) {
+          // Unset all blocks that are not in the current region.
+          unset($rendered['blocks'][$key]);
+        }
+        else {
+          // Unset existing region selection.
+          unset($rendered['blocks'][$key]['operations'], $rendered['blocks'][$key]['region-theme']);
+          // Store region and theme.
+          $rendered['blocks'][$key]['region'] = [
+            '#type' => 'value',
+            '#value' => $region,
+          ];
+          $rendered['blocks'][$key]['theme'] = [
+            '#type' => 'value',
+            '#value' => $theme,
+          ];
+        }
+      }
+
+    }
+    // Unset row to display region name and place a new block.
+    unset($rendered['blocks']["region-$region"], $rendered['blocks']["region-$region-message"]);
+    return $rendered;
+  }
+
+}
diff --git a/core/modules/block_place/src/Controller/PlaceBlockLibraryController.php b/core/modules/block_place/src/Controller/PlaceBlockLibraryController.php
new file mode 100644
index 0000000..9aa2847
--- /dev/null
+++ b/core/modules/block_place/src/Controller/PlaceBlockLibraryController.php
@@ -0,0 +1,45 @@
+<?php
+
+namespace Drupal\block_place\Controller;
+
+use Drupal\block\Controller\BlockLibraryController;
+use Drupal\Component\Serialization\Json;
+use Symfony\Component\HttpFoundation\Request;
+
+/**
+ * Block library controller that extends block module's to use offcanvas tray.
+ *
+ * @package Drupal\block_place\Controller
+ */
+class PlaceBlockLibraryController extends BlockLibraryController {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function listBlocks(Request $request, $theme) {
+    $build = parent::listBlocks($request, $theme);
+    // Alter all 'Place Block' links to use the Offcanvas tray.
+    if (isset($build['blocks']['#rows'])) {
+      if ($this->moduleHandler()->moduleExists('outside_in')) {
+        $data_dialog_attributes = [
+          'data-dialog-type' => 'dialog',
+          'data-dialog-renderer' => 'offcanvas',
+          'data-dialog-options' => Json::encode([
+            'width' => 425,
+          ]),
+        ];
+      }
+      else {
+        $data_dialog_attributes = [];
+      }
+      foreach ($build['blocks']['#rows'] as &$row) {
+        if (isset($row['operations']['data']['#links']['add'])) {
+          $row['operations']['data']['#links']['add']['attributes'] = $data_dialog_attributes + $row['operations']['data']['#links']['add']['attributes'];
+          $row['operations']['data']['#links']['add']['query']['destination'] = \Drupal::destination()->get();
+        }
+      }
+    }
+    return $build;
+  }
+
+}
diff --git a/core/modules/block_place/src/Plugin/DisplayVariant/PlaceBlockPageVariant.php b/core/modules/block_place/src/Plugin/DisplayVariant/PlaceBlockPageVariant.php
index d05c7f1..a13a315 100644
--- a/core/modules/block_place/src/Plugin/DisplayVariant/PlaceBlockPageVariant.php
+++ b/core/modules/block_place/src/Plugin/DisplayVariant/PlaceBlockPageVariant.php
@@ -6,9 +6,10 @@
 use Drupal\block\Plugin\DisplayVariant\BlockPageVariant;
 use Drupal\Component\Serialization\Json;
 use Drupal\Core\Entity\EntityViewBuilderInterface;
+use Drupal\Core\Extension\ModuleHandlerInterface;
+use Drupal\Core\Link;
 use Drupal\Core\Routing\RedirectDestinationInterface;
 use Drupal\Core\Theme\ThemeManagerInterface;
-use Drupal\Core\Link;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
 /**
@@ -36,6 +37,13 @@ class PlaceBlockPageVariant extends BlockPageVariant {
   protected $redirectDestination;
 
   /**
+   * The module handler.
+   *
+   * @var \Drupal\Core\Extension\ModuleHandlerInterface
+   */
+  protected $moduleHandler;
+
+  /**
    * Constructs a new PlaceBlockPageVariant.
    *
    * @param array $configuration
@@ -54,12 +62,15 @@ class PlaceBlockPageVariant extends BlockPageVariant {
    *   The theme manager.
    * @param \Drupal\Core\Routing\RedirectDestinationInterface $redirect_destination
    *   The redirect destination.
+   * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
+   *   The module handler.
    */
-  public function __construct(array $configuration, $plugin_id, $plugin_definition, BlockRepositoryInterface $block_repository, EntityViewBuilderInterface $block_view_builder, array $block_list_cache_tags, ThemeManagerInterface $theme_manager, RedirectDestinationInterface $redirect_destination) {
+  public function __construct(array $configuration, $plugin_id, $plugin_definition, BlockRepositoryInterface $block_repository, EntityViewBuilderInterface $block_view_builder, array $block_list_cache_tags, ThemeManagerInterface $theme_manager, RedirectDestinationInterface $redirect_destination, ModuleHandlerInterface $module_handler) {
     parent::__construct($configuration, $plugin_id, $plugin_definition, $block_repository, $block_view_builder, $block_list_cache_tags);
 
     $this->themeManager = $theme_manager;
     $this->redirectDestination = $redirect_destination;
+    $this->moduleHandler = $module_handler;
   }
 
   /**
@@ -74,7 +85,8 @@ public static function create(ContainerInterface $container, array $configuratio
       $container->get('entity_type.manager')->getViewBuilder('block'),
       $container->get('entity_type.manager')->getDefinition('block')->getListCacheTags(),
       $container->get('theme.manager'),
-      $container->get('redirect.destination')
+      $container->get('redirect.destination'),
+      $container->get('module_handler')
     );
   }
 
@@ -97,23 +109,43 @@ public function build() {
         'region' => $region,
       ];
       if ($destination) {
-        $query['destination'] = $destination;
+        $query['destination'] = $destination . "?region_sort=$region";
       }
       $title = $this->t('<span class="visually-hidden">Place block in the %region region</span>', ['%region' => $region_name]);
+      // @todo Remove module exists check when offcanvas library moved into
+      //   core.services.yml. https://www.drupal.org/node/2784443
+      if ($this->moduleHandler->moduleExists('outside_in')) {
+        $place_block_route = 'block_place.admin_library';
+        $data_dialog_attributes = [
+          'data-dialog-type' => 'dialog',
+          'data-dialog-renderer' => 'offcanvas',
+          'data-dialog-options' => Json::encode([
+            'width' => 350,
+          ]),
+        ];
+      }
+      else {
+        $place_block_route = 'block.admin_library';
+        $data_dialog_attributes = [
+          'data-dialog-type' => 'modal',
+          'data-dialog-options' => Json::encode([
+            'width' => 700,
+          ]),
+        ];
+      }
+
+      $place_block_route = 'block_place.admin_library';
+
       $operations['block_description'] = [
         '#type' => 'inline_template',
         '#template' => '<div class="block-place-region">{{ link }}</div>',
         '#context' => [
-          'link' => Link::createFromRoute($title, 'block.admin_library', ['theme' => $theme_name], [
+          'link' => Link::createFromRoute($title, $place_block_route, ['theme' => $theme_name], [
             'query' => $query,
             'attributes' => [
               'title' => $title,
               'class' => ['use-ajax', 'button', 'button--small'],
-              'data-dialog-type' => 'modal',
-              'data-dialog-options' => Json::encode([
-                'width' => 700,
-              ]),
-            ],
+            ] + $data_dialog_attributes,
           ]),
         ],
       ];
diff --git a/core/modules/block_place/tests/src/Functional/BlockPlaceTest.php b/core/modules/block_place/tests/src/Functional/BlockPlaceTest.php
index 8e89048..d7e965a 100644
--- a/core/modules/block_place/tests/src/Functional/BlockPlaceTest.php
+++ b/core/modules/block_place/tests/src/Functional/BlockPlaceTest.php
@@ -39,7 +39,7 @@ public function testPlacingBlocksAdmin() {
     $this->assertGreaterThan(0, count($visible_regions));
 
     $default_theme = $this->config('system.theme')->get('default');
-    $block_library_url = Url::fromRoute('block.admin_library', ['theme' => $default_theme]);
+    $block_library_url = Url::fromRoute('block_place.admin_library', ['theme' => $default_theme]);
     foreach ($visible_regions as $region => $name) {
       $block_library_url->setOption('query', ['region' => $region]);
       $links = $this->xpath('//a[contains(@href, :href)]', [':href' => $block_library_url->toString()]);