5 Belsize Park Mews London NW3 5BL

This site has had 4 applications since 2021: 1 approved, 1 refused.

• 2021/5690/P Granted

  5 Belsize Park Mews London NW3 5BL

  Erection of single storey roof extension and front terrace. Erection of part single/part two storey rear extension and rear terrace at first floor. Front fenestration alterations including replacement of garage door with windows. Insertion of rear windows.

  Decided 21 Feb 2022 Full applications
• 2021/3864/P Refused

  5 Belsize Park Mews London NW3 5BL

  Erection of single storey roof extension and terrace. Erection of single storey rear extension with associated rear 1st floor terrace. Insertion of roof lights. Front fenestration alterations including replacement of garage door with windows. Insertion of rear windows

  Decided 5 Nov 2021 Full applications
• 2021/0706/P Withdrawn

  5 Belsize Park Mews London NW3 5BL

  Erection of single storey roof extension and front terrace. Erection of two storey rear extension. Demolition and creation of a new rear terrace at first floor. Front fenestration alterations including replacement of garage door with windows. Insertion of rear windows

  Decided 28 May 2021 Full applications

1. 23 Sep 2022

   Received by Camden

2. 27 Oct 2022

   Validated

   Checked as complete and ready for consideration.

3. 11 Jan 2023

   Decision issued: Withdrawn Decision

4. 22 Jul 2026

   Added to PlanIndex

• 2021/5690/P Granted

  5 Belsize Park Mews London NW3 5BL

  Erection of single storey roof extension and front terrace. Erection of part single/part two storey rear extension and rear terrace at first floor. Front fenestration alterations including replacement of garage door with windows. Insertion of rear windows.

  Decided 21 Feb 2022 Full applications

The applicant withdrew this application before Camden decided it, and is free to submit a revised scheme at any time. More in our guide to what happens after a planning decision.

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.

• 5 Belsize Park Mews London NW3 5BL

  2021/3864/P 0m away

  Erection of single storey roof extension and terrace. Erection of single storey rear extension with associated rear 1st floor terrace. Insertion of roof lights. Front fenestration alterations including replacement of garage door with windows. Insertion of rear windows

  Refused Full applications Extension Loft or dormer +1
  Small domestic

• 5 Belsize Park Mews London NW3 5BL

  2021/0706/P 0m away

  Erection of single storey roof extension and front terrace. Erection of two storey rear extension. Demolition and creation of a new rear terrace at first floor. Front fenestration alterations including replacement of garage door with windows. Insertion of rear windows

  Withdrawn Full applications Extension Demolition +1
  Small domestic

• 5 Belsize Park Mews London NW3 5BL

  2021/5690/P 0m away

  Erection of single storey roof extension and front terrace. Erection of part single/part two storey rear extension and rear terrace at first floor. Front fenestration alterations including replacement of garage door with windows. Insertion of rear windows.

  Granted Full applications Extension Windows or glazing
  Small domestic

• 5 Belsize Park Mews London Camden NW3 5BL

  2022/1273/P 0m away

  Details of privacy screen and planter required by condition 4 of planning permission 2021/5690/P dated 21/02/2022 for 'Erection of single storey roof extension and front terrace. Erection of part single/part two storey rear extension and rear terrace at first floor. Front fenestration alterations including replacement of garage door with windows. Insertion of rear windows.'

  Granted Full applications Extension Windows or glazing
  Small domestic

• 3 Belsize Park Mews LONDON NW3 5BL

  2017/6198/P 15m away

  Erection of extension at roof level

  Granted Full applications Extension

• 15 Belsize Park Mews London NW3 5BL

  2026/3909/P Submitted 10 Sep 2026 18m away

  98% historically approved · decision due ~9 Nov

  Variation of Condition 2 (Approved Plans) of planning reference 2023/3492/P dated 07/08/26 for erection of roof extension, new basement level, alterations to fenestration and associated works. NAMELY: to allow revisions to the external architectural treatment of approved development.

  Awaiting decision Amendments Extension Windows or glazing 10 docs

• 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.

  16 Sep 2026 Amendments
• 2026/3909/P Awaiting decision

  15 Belsize Park Mews London NW3 5BL

  Variation of Condition 2 (Approved Plans) of planning reference 2023/3492/P dated 07/08/26 for erection of roof extension, new basement level, alterations to fenestration and associated works. NAMELY: to allow revisions to the external architectural treatment of approved development.

  10 Sep 2026 Amendments
• 2026/2771/P Granted

  Land to the North of the British Library 96 Euston Road London NW1 2DB

  Non material amendment to planning permission 2022/1041/P dated 17/07/2024 for: ‘Demolition of the British Library Centre for Conservation, alterations to the British Library and erection of a new building of 12 above-ground storeys and two basement levels for use as library, galleries, learning, business and events spaces (Class F1) and retail and commercial spaces (Class E); provision of internal and external public spaces, landscaping and a community garden; improvement works adjacent to Dangoor Walk; provision of cycle and car parking and servicing facilities including new crossovers; provision of Crossrail 2 infrastructure; means of access; and associated works’. The amendment is to revise the wording of condition 3 (Crossrail 2 Infrastructure) and partially discharge the condition in respect of perimeter piling works.

  2 Jul 2026 Amendments
• 2026/3509/P Granted

  Flat A 55 Leverton Street London NW5 2NX

  Non-material amendment to planning permission 2026/0413/P dated 12/05/2026 (Erection of a single storey side and rear extension, re-construction of rear garden boundary wall, replacement of a ground floor rear window with an access door, replacement of a side door with a window, insertion of two rooflights and reinstatement of front sash windows), namely reduction in depth of proposed lightwell between existing rear elevation and new extension.

  4 Sep 2026 Amendments
• 2026/2957/P Granted

  Land to the North of the British Library 96 Euston Road London NW1 2DB

  Non material amendment to planning permission 2022/1041/P dated 17/07/2024 for: ‘Demolition of the British Library Centre for Conservation, alterations to the British Library and erection of a new building of 12 above-ground storeys and two basement levels for use as library, galleries, learning, business and events spaces (Class F1) and retail and commercial spaces (Class E); provision of internal and external public spaces, landscaping and a community garden; improvement works adjacent to Dangoor Walk; provision of cycle and car parking and servicing facilities including new crossovers; provision of Crossrail 2 infrastructure; means of access; and associated works’. The amendment is to revise the wording of condition 6 (Water Main) and discharge the condition.

  14 Jul 2026 Amendments