diff --git a/js/src/playground/playground.js b/js/src/playground/playground.js
index 65535ca4152..a1790ed32b4 100644
--- a/js/src/playground/playground.js
+++ b/js/src/playground/playground.js
@@ -20,6 +20,7 @@ import React, { Component } from 'react';
 import CurrencySymbol from '~/ui/CurrencySymbol/currencySymbol.example';
 import QrCode from '~/ui/QrCode/qrCode.example';
 import SectionList from '~/ui/SectionList/sectionList.example';
+import Portal from '~/ui/Portal/portal.example';
 
 import PlaygroundStore from './store';
 import styles from './playground.css';
@@ -27,6 +28,7 @@ import styles from './playground.css';
 PlaygroundStore.register(<CurrencySymbol />);
 PlaygroundStore.register(<QrCode />);
 PlaygroundStore.register(<SectionList />);
+PlaygroundStore.register(<Portal />);
 
 @observer
 export default class Playground extends Component {
diff --git a/js/src/ui/Form/AddressSelect/addressSelect.js b/js/src/ui/Form/AddressSelect/addressSelect.js
index d49898eba3e..ce3aad2d353 100644
--- a/js/src/ui/Form/AddressSelect/addressSelect.js
+++ b/js/src/ui/Form/AddressSelect/addressSelect.js
@@ -176,6 +176,7 @@ class AddressSelect extends Component {
     return (
       <Portal
         className={ styles.inputContainer }
+        isChildModal
         onClose={ this.handleClose }
         onKeyDown={ this.handleKeyDown }
         open={ expanded }
diff --git a/js/src/ui/Portal/portal.css b/js/src/ui/Portal/portal.css
index a9cfed25957..d790e592c8f 100644
--- a/js/src/ui/Portal/portal.css
+++ b/js/src/ui/Portal/portal.css
@@ -15,29 +15,40 @@
 /* along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-$left: 1.5em;
-$right: $left;
-$bottom: $left;
-$top: 20vh;
+$modalMargin: 1.5em;
+$modalBackZ: 2500;
+
+/* This should be the default case, the Portal used as a stand-alone modal */
+$modalBottom: 15vh;
+$modalLeft: $modalMargin;
+$modalRight: $modalMargin;
+$modalTop: 0;
+$modalZ: 3500;
+
+/* This is the case where popped-up over another modal, Portal or otherwise */
+$popoverBottom: $modalMargin;
+$popoverLeft: $modalMargin;
+$popoverRight: $modalMargin;
+$popoverTop: 20vh;
+$popoverZ: 3600;
 
 .backOverlay {
+  background-color: rgba(255, 255, 255, 0.25);
+  opacity: 0;
   position: fixed;
   top: 0;
   right: 0;
   bottom: 0;
   left: 0;
-  background-color: rgba(255, 255, 255, 0.25);
-  z-index: -10;
-  opacity: 0;
-
   transform-origin: 100% 0;
-  transition-property: opacity, z-index;
   transition-duration: 0.25s;
+  transition-property: opacity, z-index;
   transition-timing-function: ease-out;
+  z-index: -10;
 
   &.expanded {
     opacity: 1;
-    z-index: 2500;
+    z-index: $modalBackZ;
   }
 }
 
@@ -52,45 +63,58 @@ $top: 20vh;
 }
 
 .overlay {
+  background-color: rgba(0, 0, 0, 1);
+  box-sizing: border-box;
   display: flex;
+  opacity: 0;
+  padding: 1.5em;
   position: fixed;
-  top: $top;
-  left: $left;
-  width: calc(100vw - $left - $right);
-  height: calc(100vh - $top - $bottom);
-
   transform-origin: 100% 0;
-  transition-property: opacity, z-index;
   transition-duration: 0.25s;
+  transition-property: opacity, z-index;
   transition-timing-function: ease-out;
-
-  background-color: rgba(0, 0, 0, 1);
-  opacity: 0;
   z-index: -10;
 
-  padding: 1em;
-  box-sizing: border-box;
-
   * {
     min-width: 0;
   }
 
+  &.modal {
+    bottom: $modalBottom;
+    left: $modalLeft;
+    right: $modalRight;
+    top: $modalTop;
+  }
+
+  &.popover {
+    left: $popoverLeft;
+    top: $popoverTop;
+    height: calc(100vh - $popoverTop - $popoverBottom);
+    width: calc(100vw - $popoverLeft - $popoverRight);
+  }
+
   &.expanded {
     opacity: 1;
-    z-index: 3500;
+
+    &.popover {
+      z-index: $popoverZ;
+    }
+
+    &.modal {
+      z-index: $modalZ;
+    }
   }
 }
 
 .closeIcon {
+  font-size: 4em;
   position: absolute;
-  top: 0.5rem;
   right: 1rem;
-  font-size: 4em;
-  z-index: 100;
-
-  transition-property: opacity;
+  top: 0.5rem;
   transition-duration: 0.25s;
+  transition-property: opacity;
   transition-timing-function: ease-out;
+  z-index: 100;
 
   &, * {
     height: 48px !important;
diff --git a/js/src/ui/Portal/portal.example.js b/js/src/ui/Portal/portal.example.js
new file mode 100644
index 00000000000..e8c51008ef3
--- /dev/null
+++ b/js/src/ui/Portal/portal.example.js
@@ -0,0 +1,97 @@
+// Copyright 2015-2017 Parity Technologies (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+import React, { Component } from 'react';
+
+import PlaygroundExample from '~/playground/playgroundExample';
+
+import Modal from '../Modal';
+import Portal from './portal';
+
+export default class PortalExample extends Component {
+  state = {
+    open: []
+  };
+
+  render () {
+    const { open } = this.state;
+
+    return (
+      <div>
+        <PlaygroundExample name='Standard Portal'>
+          <div>
+            <button onClick={ this.handleOpen(0) }>Open</button>
+            <Portal
+              open={ open[0] || false }
+              onClose={ this.handleClose }
+            >
+              <p>This is the first portal</p>
+            </Portal>
+          </div>
+        </PlaygroundExample>
+
+        <PlaygroundExample name='Popover Portal'>
+          <div>
+            <button onClick={ this.handleOpen(1) }>Open</button>
+            <Portal
+              isChildModal
+              open={ open[1] || false }
+              onClose={ this.handleClose }
+            >
+              <p>This is the second portal</p>
+            </Portal>
+          </div>
+        </PlaygroundExample>
+
+        <PlaygroundExample name='Portal in Modal'>
+          <div>
+            <button onClick={ this.handleOpen(2) }>Open</button>
+
+            <Modal
+              title='Modal'
+              visible={ open[2] || false }
+            >
+              <button onClick={ this.handleOpen(3) }>Open</button>
+              <button onClick={ this.handleClose }>Close</button>
+            </Modal>
+
+            <Portal
+              isChildModal
+              open={ open[3] || false }
+              onClose={ this.handleClose }
+            >
+              <p>This is the second portal</p>
+            </Portal>
+          </div>
+        </PlaygroundExample>
+      </div>
+    );
+  }
+
+  handleOpen = (index) => {
+    return () => {
+      const { open } = this.state;
+      const nextOpen = open.slice();
+
+      nextOpen[index] = true;
+      this.setState({ open: nextOpen });
+    };
+  }
+
+  handleClose = () => {
+    this.setState({ open: [] });
+  }
+}
diff --git a/js/src/ui/Portal/portal.js b/js/src/ui/Portal/portal.js
index cf7bc54a0f7..53c4324c2d8 100644
--- a/js/src/ui/Portal/portal.js
+++ b/js/src/ui/Portal/portal.js
@@ -28,9 +28,9 @@ export default class Portal extends Component {
   static propTypes = {
     onClose: PropTypes.func.isRequired,
     open: PropTypes.bool.isRequired,
-
     children: PropTypes.node,
     className: PropTypes.string,
+    isChildModal: PropTypes.bool,
     onKeyDown: PropTypes.func
   };
 
@@ -54,11 +54,16 @@ export default class Portal extends Component {
   }
 
   render () {
+    const { children, className, isChildModal } = this.props;
     const { expanded } = this.state;
-    const { children, className } = this.props;
-
-    const classes = [ styles.overlay, className ];
     const backClasses = [ styles.backOverlay ];
+    const classes = [
+      styles.overlay,
+      isChildModal
+        ? styles.popover
+        : styles.modal,
+      className
+    ];
 
     if (expanded) {
       classes.push(styles.expanded);
@@ -66,15 +71,20 @@ export default class Portal extends Component {
     }
 
     return (
-      <ReactPortal isOpened onClose={ this.handleClose }>
-        <div className={ backClasses.join(' ') } onClick={ this.handleClose }>
+      <ReactPortal
+        isOpened
+        onClose={ this.handleClose }
+      >
+        <div
+          className={ backClasses.join(' ') }
+          onClick={ this.handleClose }
+        >
           <div
             className={ classes.join(' ') }
             onClick={ this.stopEvent }
             onKeyDown={ this.handleKeyDown }
           >
             <ParityBackground className={ styles.parityBackground } />
-
             { this.renderCloseIcon() }
             { children }
           </div>
@@ -91,7 +101,10 @@ export default class Portal extends Component {
     }
 
     return (
-      <div className={ styles.closeIcon } onClick={ this.handleClose }>
+      <div
+        className={ styles.closeIcon }
+        onClick={ this.handleClose }
+      >
         <CloseIcon />
       </div>
     );
@@ -107,6 +120,7 @@ export default class Portal extends Component {
   }
 
   handleKeyDown = (event) => {
+    const { onKeyDown } = this.props;
     const codeName = keycode(event);
 
     switch (codeName) {
@@ -116,12 +130,16 @@ export default class Portal extends Component {
 
       default:
         event.persist();
-        return this.props.onKeyDown(event);
+        return onKeyDown
+          ? onKeyDown(event)
+          : false;
     }
   }
 
   handleDOMAction = (ref, method) => {
-    const refItem = typeof ref === 'string' ? this.refs[ref] : ref;
+    const refItem = typeof ref === 'string'
+      ? this.refs[ref]
+      : ref;
     const element = ReactDOM.findDOMNode(refItem);
 
     if (!element || typeof element[method] !== 'function') {
diff --git a/js/src/ui/Portal/portal.spec.js b/js/src/ui/Portal/portal.spec.js
new file mode 100644
index 00000000000..6d2f5d5f384
--- /dev/null
+++ b/js/src/ui/Portal/portal.spec.js
@@ -0,0 +1,47 @@
+// Copyright 2015-2017 Parity Technologies (UK) Ltd.
+// This file is part of Parity.
+
+// Parity is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// Parity is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with Parity.  If not, see <http://www.gnu.org/licenses/>.
+
+import { shallow } from 'enzyme';
+import React from 'react';
+import sinon from 'sinon';
+
+import Portal from './';
+
+let component;
+let onClose;
+
+function render (props = {}) {
+  onClose = sinon.stub();
+  component = shallow(
+    <Portal
+      onClose={ onClose }
+      open
+      { ...props }
+    />
+  );
+
+  return component;
+}
+
+describe('ui/Portal', () => {
+  beforeEach(() => {
+    render();
+  });
+
+  it('renders defaults', () => {
+    expect(component).to.be.ok;
+  });
+});
diff --git a/js/src/ui/index.js b/js/src/ui/index.js
index 99a6348af2d..37dc88e9a39 100644
--- a/js/src/ui/index.js
+++ b/js/src/ui/index.js
@@ -47,6 +47,7 @@ import muiTheme from './Theme';
 import Page from './Page';
 import ParityBackground from './ParityBackground';
 import PasswordStrength from './Form/PasswordStrength';
+import Portal from './Portal';
 import QrCode from './QrCode';
 import SectionList from './SectionList';
 import ShortenedHash from './ShortenedHash';
@@ -103,6 +104,7 @@ export {
   Page,
   ParityBackground,
   PasswordStrength,
+  Portal,
   QrCode,
   RadioButtons,
   Select,