31A Camden Mews London NW1 9BY

This site has had 2 applications since 2026.

• 2025/2116/P Awaiting decision

  31A Camden Mews London NW1 9BY

  Erection of a full width roof extension to the second floor with two rear dormer windows and one front dormer window and new access to the existing front roof terrace, alterations to the front elevation fenestration includes a new entrance door and installation of a timber screen and glazing to convert the integral car port into additional accommodation.

  Full applications

1. 27 Aug 2026

   Received by Camden

2. 10 Sep 2026

   Validated

   Checked as complete and ready for consideration.

3. 17 Sep 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 5 November 2026, 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 42 days over the applications it decided in the last year.

• 2025/2116/P Awaiting decision

  31A Camden Mews London NW1 9BY

  Erection of a full width roof extension to the second floor with two rear dormer windows and one front dormer window and new access to the existing front roof terrace, alterations to the front elevation fenestration includes a new entrance door and installation of a timber screen and glazing to convert the integral car port into additional accommodation.

  Full applications

This application is with Camden for determination, against a statutory target of eight weeks. Over the last year Camden decided amendment applications in a median of 49 days. More in our guide to how long planning decisions take.

An amendment application makes limited changes to a permission that already exists; anything beyond modest adjustment needs a fresh application. More in our guide to planning application types.

• 31A Camden Mews London NW1 9BY

  2025/2116/P 50 yards away

  91% historically approved

  Erection of a full width roof extension to the second floor with two rear dormer windows and one front dormer window and new access to the existing front roof terrace, alterations to the front elevation fenestration includes a new entrance door and installation of a timber screen and glazing to convert the integral car port into additional accommodation.

  Awaiting decision Full applications Extension Loft or dormer +1

• 33 Camden Mews London NW1 9BY

  2023/2656/P 50 yards away

  Erection of two-storey rear extension; enlargement of existing second storey onto roof terrace; and associated alterations to front and rear fenestration.

  Granted Full applications Extension Windows or glazing

• 33 Camden Mews London NW1 9BY

  2024/4281/P 50 yards away

  Non-material amendment to planning permission 2023/2656/P dated 26/06/2024 for the 'Erection of two-storey rear extension; enlargement of existing second storey onto roof terrace; and associated alterations to front and rear fenestration', namely for relocation of the external door and addition of small window at roof level, removal of front facing roof level dormer, increasing size of rooflight, reduction of the rear extension depth, and reconfiguration of glazing bars to rear elevation windows.

  Granted Full applications Extension Loft or dormer +1

• 33 Camden Mews London NW1 9BY

  2024/4650/P 50 yards away

  Details to discharge Condition 6 (Arboricultural Method Statement) of planning permission 2023/2656/P dated 26/06/2024 for the 'Erection of two-storey rear extension; enlargement of existing second storey onto roof terrace; and associated alterations to front and rear fenestration'.

  Granted Full applications Extension Windows or glazing

• 33 Camden Mews London NW1 9BY

  2024/5503/P 50 yards away

  Details to discharge Condition 5 (Green Roof) of planning permission 2023/2656/P dated 26/06/2024 (as amended by 2024/4281/P, dated 17/10/2024) for the 'Erection of two-storey rear extension; enlargement of existing second storey onto roof terrace; and associated alterations to front and rear fenestration'.

  Granted Full applications Extension Windows or glazing

• 31 Camden Mews London NW1 9BY

  2025/4157/T Submitted 19 Sep 2025 50 yards away

  DD 5 Day Notice REAR GARDEN: 1 x Dead tree (T1) - Fell to ground level.

  Granted Trees 2 docs

• 2026/1982/P Granted

  29 Healey Street London NW1 8SR

  Variation of conditions 2 (approved plans) of planning permission 2025/1250/P granted 13/05/2025 (for: 'Erection of part one and part two storey rear extension and roof terrace at second floor; erection of a mansard roof extension.') namely to amend the materiality of the proposed rear elevation joinery.

  Received 18 May, published by the council 24 Jul 2026 Amendments
• 2026/4008/P Awaiting decision

  6 Murray Street London NW1 9RE

  Non-material amendment to planning permission ref. 2023/3483/P (dated 25/10/2023) for 'Erection of mansard roof extension and replacement shopfront', NAMELY for changes to the rear dormers.

  Received 16 Sep, published by the council 17 Sep 2026 Amendments
• 2026/3390/P Granted

  The British Museum Great Russell Street London WC1B 3DG

  Amendments to planning permission ref. 2025/0038/P dated 03/03/2025, as amended by ref. 2026/2945/P dated 24/07/2026 for the continued use of single storey structures at the south and north entrances to provide an external search facility to the museum for a temporary period, NAMELY to vary Condition 1 (temporary structure) to allow the continued use of the single storey security structure at the north entrance for a further temporary period.

  Received 7 Aug, published by the council 15 Aug 2026 Amendments
• 2025/4829/P Granted

  Former Hampstead Police Station 26 Rosslyn Hill London NW3 1PD

  Variation of condition 2 (Approved drawings) of application 2024/1078/P dated 24/07/2025 for 'Change of use from former police station (sui generis) to provide 5 residential units(Use Class C3) and commercial floorspace (Use Class E), space for a private healthcare use (Use Class E(e)). three storey and four storey rear extensions, replacement of windows, external alterations, landscaping, cycle and refuse storage, rooftop plant and associated ancillary works.' changes include replacement of 1970's extension, location of proposed plant, removal and addition of windows on rear elevation, landscaping alterations.

  Received 27 Oct, published by the council 24 Jul 2026 Amendments
• 2026/1189/P Granted

  Flat 2 47 Compayne Gardens London NW6 3DB

  Variation of condition 2 (approved drawings) of planning permission 2023/3067/P dated 21/06/2024 for 'Extension of existing basement and creation of terrace with bi fold doors and garden access stairs above, new lightwell to the side with metal grille cover, proposed side windows and landscaping to the side and rear' changes include changing location of the lightwell from side to front (Retrospective)

  Received 12 May, published by the council 24 Jul 2026 Amendments