3 Princess Mews London NW3 5AP

Pending 2026/2009/P
Extensions & alterations
Council
Camden 3.2/10
Date received
20 May 2026
Date validated
20 May 2026
Postcode
NW3 5AP

Description

Alteration to the rear roof pitch and associated enlargement of roof terrace, enlargement of the window on the rear roof slope and repositioning of the staircase for access to the roof.

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Nearby new applications

29 Rosslyn Hill London NW3 5UJ

DD 5 Day Notice REAR GARDEN; 1 x Birch (T1) - Fell to ground level.

2026/2234/T - 2 Jun 2026

Flat 1st Floor 14 Buckland Crescent London NW3 5DX

Replacement of existing metal framed door and fanlight at front first floor leve...

2026/2207/P - 1 Jun 2026

North Bridge House Nursery School 33 Fitzjohn's Avenue London NW3 5JY

FRONT GARDEN: Group of Saplings (G1) - Fell to ground level.(see photo).

2026/2151/T - 27 May 2026

North Bridge House Nursery School 33 Fitzjohn's Avenue London NW3 5JY

DD 5 Day Notice FRONT GARDEN: 1 x Unknown (T1) - Fell to ground level.

2026/2141/T - 27 May 2026

Land adjacent to 63 Netherhall Gardens London NW3 5RE

Details pursuant to discharge condition 5 (PV panels), 7 (water efficiency) and ...

2026/2081/P - 27 May 2026

North Bridge House Nursery School 33 Fitzjohn's Avenue London NW3 5JY

Details pursuant to condition 6 (odour abatement) of planning permission 2025/45...

2026/2060/P - 22 May 2026

Historical activity at this location

25 nearby applications on record - archival context, not part of the live application.

Within ~100m

Nearby activity

2023 With conditions
15 Belsize Park Mews London NW3 5BL
Erection of roof extension, new basement level, alterations to fenestration and associate…
2023/3492/P
2024 Refused
1st Floor Flat 7 Belsize Avenue London NW3 4BL
Installation of black metal railings on flat roof of front portico and replacement of exi…
2024/5454/P
2023 Withdrawn
Flat 1 27 Belsize Park London NW3 4DU
Alterations to front and side fenestration, installation of new hard and soft landscaping…
2023/1546/P
2024 Approved
5 Belsize Court Garages Belsize Lane London NW3 5AJ
Replacement of two existing front dormers with three new dormers, replacement of front gr…
2024/4791/P
2024 Approved
Flat A 18 Belsize Park London NW3 4DU
(TPO REF: 24H-T53) FRONT GARDEN: 1 x Lime - Reduce back to previous points.
2024/4513/T
2024 Approved
Basement 62 Belsize Lane Camden NW3 5AR
Change of use of Basement (Use Class E) to facilitate the educational use of the site (Us…
2024/2918/P
2024 Approved
Flat A 19 Belsize Park London NW3 4DU
Conversion of two flats into one residential unit.
2024/3761/P
2024 Approved
13 Belsize Crescent London NW3 5QY
REAR GARDEN: 1 x Loquat (T1) - Fell to ground level. 1 x Corsican Pine (T2) - Fell to gro…
2024/3790/T
2024 Approved
6 Belsize Crescent London NW3 5QU
Retrospective application for the retention of equipment to supply gas to the exterior of…
2024/3514/P
2024 Approved
20 Belsize Park London NW3 4DU
(TPO REF: 24H-T52) FRONT GARDEN: 1 x Lime (T1) - Reduction of crown to previous reduction…
2024/2717/T
2024 Approved
8 Belsize Crescent London NW3 5QU
(TPO REF: 23H-T1 & T2) FRONT GARDEN: 2 x Limes (G2) - Reduce lateral and vertical growth…
2024/2885/T
2023 With conditions
13 Belsize Crescent London NW3 5QY
Basement excavation, installation of external platform lift, reconfiguration of external…
2023/0692/P
2024 Approved
Flat D 5 Belsize Crescent London NW3 5QY
Creation of a dormer window to rear elevation
2024/1260/P
2024 Approved
Akenside Court 26 Belsize Crescent London NW3 5QT
(TPO REF: C60-T12) REAR GARDEN: 1 x Poplar (T6) - Re-pollard. (TPO REF: C60-T09) REAR GAR…
2024/2467/T
2024 Approved
Akenside Court 26 Belsize Crescent London NW3 5QT
REAR GARDEN: 1 x Sycamore (T1) - Reduce back to previous and most recent reduction points…
2024/2340/T
2024 Refused
8 Village Close Belsize Lane London NW3 5AH
Erection of two storey side and rear extensions and single storey front extension with ch…
2024/1789/P
2023 Approved
3 Belsize Mews London Camden NW3 5AT
Loft extension including new terrace area.
2023/3257/P
2024 Approved
Lyndhurst Court 8 Lyndhurst Gardens London NW3 5NR
(TPO REF C62-T27) REAR GARDEN: 1 x Sycamore (T1) - Reduce SE aspect of crown 1m below pre…
2024/1415/T
2023 Approved
13 Belsize Crescent London NW3 5QY
Remodelling of dormer, fenestration alterations, replacement windows, installation of roo…
2023/0693/P
2024 Withdrawn
Flat D 5 Belsize Crescent London NW3 5QY
Creation of a dormer window to rear elevation
2024/0500/P
2016 Approved
4 Princess Mews London NW3 5AP
Alteration to rear slope of existing mansard roof to provide additional living space; ere…
2016/6553/P
2016 Approved
Belsize Place Garages Belsize Place London NW3 5AL
Replacement of garages and open car spaces with a landscaped garden
2016/6708/P
2017 Approved
1 Belsize Avenue London NW3 4BL
(TPO REF 23H) FRONT GARDEN: 1 x Mulberry - Crown reduce by 0.5-1m from height and by 1.5m…
2017/0384/T
2017 Approved
1 Belsize Avenue London NW3 4BL
FRONT GARDEN: 1 x Robinia - Crown reduce by 1.5 - 2.5m all over (back to previous points)
2017/0337/T
2017 Approved
4 Lyndhurst Gardens London NW3 5NR
(TPO REF C60) REAR GARDEN: 1 x Lime - Reduce by 1.5 - 2m
2017/0378/T
Camden
Planning Authority Score
3.2/10
Poor
#229 of 292 councils
Relevant to this application:
Householder decisions

Camden is slower than most councils at deciding householder applications, ranking #222 out of 292. Householder applications are slightly less likely to be approved here (86%) than the national average (90%).

Slower than most councils
for householder decisions
These figures are council-wide context, not a prediction for this application. View full council performance
Camden decision performance
Based on MHCLG data, 2025
89%
Overall approval rate
Above avg (87%) #128 of 292
86%
Householder approved
Below avg (90%) #234 of 292
53%
Decided in 8 weeks
Below avg (64%) #222 of 292
39%
Extended time limit
Below avg (40%) #138 of 292
89%
Minor dwellings approved
442 decided (1-9 homes)
71%
Major dwellings approved
7 decided (10+ homes)
90%
Change of use approved
52 decided
1,969
Total decisions
208 refused in 2025
Source: MHCLG planning statistics · See full council rankings