Skip to content
PlanIndex Get alerts
Menu

Planning application

33 Devonshire Mews West London W1G 6QF

Granted Westminster 23/03331/FULL Full Planning Permission Application

Works: Extension Roofing

Permission granted. Work must normally begin within three years of the decision or the permission lapses.

Proposal

Erection of new roof extension to existing flat roof and alterations to front elevation all in connection with the use of the property as two residential units (Class C3)

As published by the council, reference 23/03331/FULL

Application record

Reference
23/03331/FULL
Type
Full Planning Permission Application
Status
Decided
Decision
Granted As published: Application Permitted
Received
19 May 2023
Validated
5 Jun 2023
Decided
8 Aug 2023
Ward
Marylebone
Decision by
Complex Delegated Decision
Postcode
W1G 6QF

Site history

Applications at this address on the Westminster register

This site has had 4 applications since 2023: 1 approved, 0 refused.

  • 26/06865/CLEUD Awaiting decision

    33 Devonshire Mews West London W1G 6QF

    Confirmation of lawful commencement of works in accordance with planning permission (RN 23/03331/FULL)

    Submitted 8 Oct 2026 Lawful development
  • 26/03461/ADFULL Awaiting decision

    33 Devonshire Mews West London W1G 6QF

    Details of sample of clear glass / sample of obscure glass for privacy screen pursuant to conditions 9 and 10 of planning permission dated 08 August 2023 (RN: 23/03331/FULL)

    Submitted 27 May 2026 Full applications
  • 26/03460/ADFULL Awaiting decision

    33 Devonshire Mews West London W1G 6QF

    Details of waste and recycling storage / sample of natural slate for roof pursuant to conditions 3 and 8 of planning permission dated 08 August 2023 (RN: 23/03331/FULL)

    Submitted 27 May 2026 Full applications

Timeline

Dates from the published record

  1. 19 May 2023

    Received by Westminster

  2. 5 Jun 2023

    Validated

    Checked as complete and ready for consideration.

  3. 8 Aug 2023

    Decision issued: Application Permitted

  4. 2 Oct 2026

    Added to PlanIndex

Cases linked to this one on the register

1 later application on the register refers to this one:

  • 26/06865/CLEUD Awaiting decision

    33 Devonshire Mews West London W1G 6QF

    Confirmation of lawful commencement of works in accordance with planning permission (RN 23/03331/FULL)

    Submitted 8 Oct 2026 Lawful development

Who's behind it

Company information only, from the register and Companies House

Cox Associates Agent

1 application on PlanIndex

Trade members see everything this firm has filed, how it was decided, and get an email the day it files again.

See their track record

Documents

Plans, drawings, consultee responses and the officer's report

17 documents on file for this application

A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.

Watch members (£5 a month) open the document list from here.

Open the documents

What this grant of permission means

Westminster granted permission on 8 August 2023, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

About full applications

A full application seeks permission for a complete, detailed proposal in one go, with siting, design, access and landscaping all fixed at this stage. More in our guide to planning application types.

Nearby applications

Within 0.3 miles

  • First Floor Flat 131 Harley Street London W1G 6BB

    19/00914/ADLBC Submitted 6 Feb 2019 50 yards away

    Details pursuant to condition 2 parts iii, iv, v and vi of Listed Building Consent dated 04 February 2018 (RN: 19/00374/LBC), namely the submission of detailed drawings of the floor finishes and how they relate to the eixisting origional floor baords; WC Pod; the new opening to the principal room from the kitchen and service routes and duct and pipework

    Granted Conditions 9 docs
  • First Floor Flat 131 Harley Street London W1G 6BB

    18/01493/LBC Submitted 21 Feb 2018 50 yards away

    Internal alterations to first floor flat, replacement of front elevation windows and relocation of boiler flue on rear elevation

    Granted Heritage and listed buildings Windows or glazing 17 docs
  • Second Floor Flat 131 Harley Street London W1G 6BB

    13/03190/ADLBC Submitted 9 Apr 2013 50 yards away

    Details of new fire surround and fire place pursuant to Condition 5 of listed building consent dated 05 February 2013 (RN: 12/11246)

    Refused Conditions 4 docs
  • 33 Devonshire Mews West London W1G 6QF

    26/06865/CLEUD Submitted 8 Oct 2026 50 yards away

    84% historically approved · decision due ~3 Dec

    Confirmation of lawful commencement of works in accordance with planning permission (RN 23/03331/FULL)

    Awaiting decision Lawful development
  • 33 Devonshire Mews West London W1G 6QF

    26/03461/ADFULL Submitted 27 May 2026 50 yards away

    88% historically approved · decision due ~29 Jul

    Details of sample of clear glass / sample of obscure glass for privacy screen pursuant to conditions 9 and 10 of planning permission dated 08 August 2023 (RN: 23/03331/FULL)

    Awaiting decision Full applications 5 docs
  • 33 Devonshire Mews West London W1G 6QF

    26/03460/ADFULL Submitted 27 May 2026 50 yards away

    88% historically approved · decision due ~22 Jul

    Details of waste and recycling storage / sample of natural slate for roof pursuant to conditions 3 and 8 of planning permission dated 08 August 2023 (RN: 23/03331/FULL)

    Awaiting decision Full applications 5 docs

In Westminster

  • 26/05984/FULL Decided

    41 Sutherland Street London SW1V 4JX

    Replacement of front, side and rear windows with double glazed timber framed sash windows and replacement of a door with a double glazed timber framed door.

    Received 2 Sep, published by the council 11 Sep 2026 Full applications
  • 26/06134/FULL Decided

    Flat 10H Hyde Park Mansions Cabbell Street London NW1 5BG

    Replacement of front and rear second floor level windows with slim-profile double-glazed panels, retaining the existing window and door frames.

    Received 8 Sep, published by the council 15 Sep 2026 Full applications
  • 26/07258/FULL Awaiting decision

    16A Croxley Road London W9 3HL

    Installation of air to air heat pumps to offices and bedrooms.

    Received 22 Oct, published by the council 23 Oct 2026 Full applications
  • 26/07193/FULL Awaiting decision

    98 Victoria Street London SW1E 5JL

    Shopfront alterations. (Linked with 26/07194/ADV)

    Received 21 Oct, published by the council 22 Oct 2026 Full applications
  • 26/07187/FULL Awaiting decision

    Ground Floor Flat 151 Portnall Road London W9 3BN

    Erection of a single storey rear extension.

    Received 21 Oct, published by the council 22 Oct 2026 Full applications