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 91 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 106 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  Withdrawn Full applications Extension 8 docs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

  88% historically approved · decision due ~5 Aug

  Replacement of 11 existing windows and external doors.

  Awaiting decision Full applications Windows or glazing 19 docs

• 26/07468/CLOPUD Awaiting decision

  14 - 16 Great Portland Street London W1W 8QW

  Confirmation the demolition of the existing outrigger structure at fifth floor level (the Proposed Works) constitutes the lawful commencement of development pursuant to the Permission.

  Received 3 Nov, published by the council 5 Nov 2026 Lawful development
• 26/07423/CLOPUD Awaiting decision

  103 Elgin Avenue London W9 2NP

  Painting of the decorative stonework, window frames and doors on the front elevation and front boundary wall

  Received 2 Nov, published by the council 4 Nov 2026 Lawful development
• 26/07454/CLOPUD Awaiting decision

  10 Stratton Street London W1J 8LG

  Changes to existing windows and doors

  Received 2 Nov, published by the council 5 Nov 2026 Lawful development
• 26/07381/CLEUD Awaiting decision

  Ground Floor Rear Flat 4 Mozart Street London W10 4LA

  Use of the ground floor rear flat as short-term visitor accommodation.

  Received 28 Oct, published by the council 5 Nov 2026 Lawful development
• 26/07339/CLOPUD Awaiting decision

  123 Victoria Street London SW1E 6DE

  Use of part of ground floor reception area within Class E including, but not limited to, a retail café (Class E(a)).

  Received 27 Oct, published by the council 30 Oct 2026 Lawful development