Planning application
2026/1739/P
13 Belsize Mews London Camden NW3 5AT
Proposal
Retention of a 'lawful' casement window at first floor level on side (Belsize Mews) elevation
As published by the council, reference 2026/1739/P
Timeline
Dates from the published record
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7 May 2026
Received by Camden
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8 May 2026
Validated
Checked as complete and ready for consideration.
-
9 Jun 2026
Decision issued: Granted
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24 Jul 2026
Added to PlanIndex
What a grant of permission means
The process from here
Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.
Work must normally begin within three years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.
About lawful development applications
How this application type works
A lawful development certificate is a legal determination, not a planning judgement. It asks the council to confirm either that existing use or works are lawful, often through the passage of time, or that a proposal would not need planning permission at all. The applicant must prove the facts; the merits of the scheme are not considered.
Nearby applications
Within 500 metres
-
2018/3976/P Withdrawn
29 Belsize Lane London NW3 5AS
Replacement of plant equipment, screening and planters on flat roof to rear.
-
2019/2676/P Withdrawn
29 Belsize Lane London NW3 5AS
Erection of additional storey on roof to provide a new self-contained (two bedroom) flat
-
2018/4114/A Withdrawn
29 Belsize Lane London NW3 5AS
Installation of 1 x internally illuminated projecting sign; 1 x internally illuminated sign suspended internally; 1 x fascia sign, and; 1 x vinyl sign to shop.
-
2021/3043/P Granted
13 Belsize Mews London NW3 5AT
Details of new door pursuant to condition 2 of planning permission 2020/5948/P granted 08/04/2021 for 'Replacement of existing kitchen window on first floor at rear with door to enable access to flat roof (for maintenance purposes)'
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2020/5948/P Granted
13 Belsize Mews / 29 Belsize Lane London NW3 5AT
Replacement of existing kitchen window on first floor at rear with door to enable access to flat roof (for maintenance purposes).
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2020/0428/P Refused
13 Belsize Mews & 29 Belsize Lane London NW3 5AT
Erection of a single storey extension and formation of roof terrace at first floor level at 13 Belsize Mews; and relocation of the existing plant equipment at first floor associated with the ground floor restaurant at 29 Belsize Lane.
Other lawful development applications
In Camden
-
2026/3230/P Awaiting decision
6 Lyndhurst Road London NW3 5PX
Amalgamation of the existing lower ground floor flat and upper maisonette into a single dwellinghouse, involving the formation of a new internal staircase and associated internal alterations.
-
2026/2602/P Granted
5 Brookfield Park London NW5 1ES
Erection of a single storey outbuilding in rear garden for purposes incidental to the enjoyment of the dwellinghouse.
-
2026/2586/P Granted
Flat Ground Floor 96 Agar Grove London NW1 9TL
Use of rear flat roof area at raised ground level as an amenity terrace, consisting of decking, platform, safety railings and external access door.
-
2026/0791/P Granted
7 A Netherhall Gardens London Camden NW3 5RN
Proposed single storey, timber framed, timber clad garden studio located in the rear garden.
-
2026/2569/P Granted
16 Gladys Road London NW6 2PX
Amalgamation of two flats.