3 Southwick Street London W2 2PR

1. 2 Apr 2026

   Received by Westminster

2. 21 Jul 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 28 May 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

   Westminster took a median of 66 days over the applications it decided in the last year.

This application is with Westminster for determination, against a statutory target of eight weeks. Over the last year Westminster decided lawful development applications in a median of 78 days. More in our guide to how long planning decisions take.

A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.

• 122 Devonport 23 Southwick Street London W2 2QH

  07/02874/FULL Submitted 29 Mar 2007 50 yards away

  Extension of garden room at roof level onto the existing terrace.

  Granted Full applications Extension 11 docs

• 127 Devonport 23 Southwick Street London W2 2QH

  04/05718/FULL Submitted 22 Jul 2004 50 yards away

  Erection of an extension on the roof terrace at sixth floor level to provide additional living space.

  Granted Full applications Extension 14 docs

• 127 Devonport 23 Southwick Street London W2 2QH

  05/04866/FULL Submitted 20 Jun 2005 50 yards away

  Construction of extension at roof terrace level to provide additional space as a kitchen/dining room space.

  Withdrawn Full applications Extension 8 docs

• 115 Devonport 23 Southwick Street London W2 2QH

  12/01790/CAC Submitted 17 Feb 2012 50 yards away

  Rear extension at top floor flat to create a new conservatory.

  Decided Heritage and listed buildings Extension

• Devonport 23 Southwick Street London W2 2PR

  26/00209/TCA Submitted 14 Jan 2026 50 yards away

  T216 1 x silver birch: crown lift over adjacent Loquat to achieve 1m clearance of foliage.

  Granted Trees 10 docs

• 94 The Quadrangle Sussex Gardens London W2 2RR

  26/03618/FULL Submitted 3 Jun 2026 50 yards away

  87% historically approved · decision due ~5 Aug

  Replacement of 11 existing windows and external doors.

  Awaiting decision Full applications Windows or glazing 19 docs

• 26/06158/CLOPUD Awaiting decision

  2 Hamilton Gardens London NW8 9PT

  Erection of replacement, enlarged single storey ground floor rear extension.

  Received 9 Sep, published by the council 15 Sep 2026 Lawful development
• 26/06080/CLEUD Awaiting decision

  91 Gloucester Place London W1U 6JG

  Certificate of lawfulness for an existing use or development to confirm that the development authorised by full planning permission ref. 22/08385/FULL & listed building consent (RN 22/08386/LBC) has lawfully commenced as a result of the works evidenced.

  Received 7 Sep, published by the council 14 Sep 2026 Lawful development
• 26/06044/CLOPUD Awaiting decision

  9 Abinger Mews W9 3SP

  Proposed loft conversion with rear dormer and 3 front rooflights to existing mid-terraced house.

  Received 3 Sep, published by the council 11 Sep 2026 Lawful development
• 26/06035/CLOPUD Awaiting decision

  30 Ashworth Road W9 1JY

  Erection of new garden retaining wall and erection of new garden timber fence to match the height of existing fence.

  Received 3 Sep, published by the council 11 Sep 2026 Lawful development
• 26/05871/CLEUD Awaiting decision

  32 Cambridge Street London SW1V 4QH

  Confirmation of the lawful implementation of planning permission dated 13 August 2021 (RN: 21/04143/FULL) has commenced before the expiry of the three year time period and may, therefore, lawfully be carried out and completed.

  Received 27 Aug, published by the council 4 Sep 2026 Lawful development