38 - 40 Windmill Street London W1T 2BE

This site has had 11 applications since 2023: 3 approved, 3 refused.

• 2025/4416/P At appeal

  38 - 40 Windmill Street London W1T 2BE

  Certificate of lawfulness (proposed) for strengthening works at fourth floor level.

  Submitted 15 Oct 2025 Lawful development
• 2025/1311/P Granted

  38 - 40 Windmill Street London W1T 2BE

  Proposed front extension at fourth and fifth floor levels and replacement of existing glazed balustrade at fourth floor level with metal balustrade.

  Decided 22 May 2025 Full applications
• 2025/0675/P Granted

  38-40 Windmill Street London W1T 2BE

  Certificate of lawfulness (proposed) for conversion of two flats into one residential unit.

  Decided 7 Mar 2025 Full applications
• 2024/3551/P Refused

  38-40 Windmill Street London W1T 2BE

  Siting of a caravan, as shown in the accompanying plans, for use incidental to the lawful residential use of the land, at the fourth floor.

  Decided 22 Oct 2024 Full applications
• 2024/3476/P Refused

  38-40 Windmill Street London W1T 2BE

  Siting of a shipping container, for use incidental to the lawful residential use of the land, at the fourth-floor level.

  Decided 22 Oct 2024 Full applications
• 2024/2186/INVALID Withdrawn

  38-40 Windmill Street London W1T 2BE

  Siting of a shipping container, for use incidental to the lawful residential use of the land, at the fourth-floor level.

  Decided 18 Dec 2024 Lawful development
• 2024/2187/INVALID Withdrawn

  38-40 Windmill Street London W1T 2BE

  Siting of a caravan for use, incidental to the lawful residential use of the land, at the fourth floor.

  Decided 18 Dec 2024 Lawful development
• 2023/3865/P Withdrawn

  38-40 Windmill Street London W1T 2BE

  Siting of a caravan for use, ancillary to the lawful residential use of the land, at the fourth floor

  Decided 28 Mar 2024 Full applications
• 2024/0862/P Refused

  38-40 Windmill Street London W1T 2BE

  Siting of a shipping container, for use incidental to the lawful residential use of the land, at the fourth-floor level.

  Decided 3 May 2024 Lawful development
• 2023/4907/P Granted

  38-40 Windmill Street London W1T 2BE

  Siting of a caravan for use, incidental to the lawful residential use of the land, at the fourth floor.

  Decided 12 Jan 2024 Lawful development

1. 15 Oct 2025

   Received by Camden

2. 17 Oct 2025

   Validated

   Checked as complete and ready for consideration.

3. 24 Jul 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 12 December 2025, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

   Camden took a median of 43 days over the applications it decided in the last year.

This application is at appeal, which passes the decision from Camden to the planning inspectorate, and the outcome will replace the council's decision. More in our guide to what happens after a planning decision.

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.

• 38 Windmill Street London W1T 2JX

  2012/4984/P 50 yards away

  Details of cycle storage required by condition 3 of planning permission 2010/5167/P dated 05/05/2011 for change of use of third floor offices (class B1a) and vacant first and second floors (Class B8) to create 6x two-bedroom flats (class C3), including rear extensions at first, second, third and fourth floors and associated external alterations.

  Granted Full applications New dwelling Extension

• 38-40 Windmill Street London W1T 2BE

  2023/4907/P Submitted 17 Nov 2023 50 yards away

  Siting of a caravan for use, incidental to the lawful residential use of the land, at the fourth floor.

  Granted Lawful development 3 docs

• 38-40 Windmill Street London W1T 2BE

  2023/3865/P 50 yards away

  Siting of a caravan for use, ancillary to the lawful residential use of the land, at the fourth floor

  Withdrawn Full applications

• 38 Windmill Street London W1T 2JX

  2013/4588/P 50 yards away

  Extensions to the front at fourth and fifth floor level including remodelling the existing elevations and reconfiguring the 2 flats (Class C3).

  Refused Full applications New dwelling Extension
  Several homes

• 38-40 Windmill Street London W1T 2BE

  2025/0675/P 50 yards away

  Certificate of lawfulness (proposed) for conversion of two flats into one residential unit.

  Granted Full applications New dwelling
  Several homes

• 38-40 Windmill Street London W1T 2BE

  2024/0862/P Submitted 11 Mar 2024 50 yards away

  Siting of a shipping container, for use incidental to the lawful residential use of the land, at the fourth-floor level.

  Refused Lawful development 45 docs

• 2026/4314/P Awaiting decision

  Basement Flat & Flat Raised Ground Floor 46 Primrose Hill Road London NW3 3AA

  Amalgamation of two self-contained flats to form a self-contained maisonette on lower ground and raised ground floor.

  Received 6 Oct, published by the council 9 Oct 2026 Lawful development
• 2026/4304/P Awaiting decision

  68 Clarence Way London NW1 8DG

  Erection of single storey outbuilding in rear garden.

  Received 2 Oct, published by the council 9 Oct 2026 Lawful development
• 2026/3821/P Granted

  Plots B, C and D at Highgate Studios Highgate Road London NW5 1TL

  Certificate of Lawful Development to confirm the lawful use of the site is for office use (Class E(g)(i)) and that the use of the site as a gym (Class E(d)) or any other use falling within Class E would be lawful.

  Received 4 Sep, published by the council 11 Sep 2026 Lawful development
• 2026/3389/P Granted

  99 Heath Street London NW3 6SS

  Confirmation of the implementation of planning permission 2007/3874/P granted, subject to a legal agreement dated 06/12/2007 for 'Change of use from offices (A2) to single family dwellinghouse (C3), the erection of extension at rear ground floor level within courtyard and formation of a terrace over, extension at ground floor level to western end of courtyard, creation of off-street open car parking space and minor elevational changes to The Mount elevation.', by way of erection of the extension at ground floor level to the western end of the courtyard, creation of an off-street car parking space, and minor elevational changes to the Mount elevation.

  Received 7 Aug, published by the council 15 Aug 2026 Lawful development
• 2026/2493/P Granted

  8 Fitzroy Road London Camden NW1 8TX

  Use of the entire building for a single-family home (C3 residential).

  Received 16 Jun, published by the council 24 Jul 2026 Lawful development