25 Belsize Square Camden NW3 4HU
Change of use of serviced apartments/short term visitor accommodation (Class C1) to residential (Class C3) to provide 6 x flats, erection of; new and replacement dormers to front and rear roof slopes, rear extensions to lower ground floor, creation of rear terraces to rear extensions and rear roof slope, addition of replacement of sash windows with glazed doors to upper ground floor at rear.
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Progress
Application details
- Reference
- 2026/4029/P
- Local authority
- Camden
- Postcode
- NW3 4HU
- Ward
- Belsize
- Application type
- All Other
- Property type
- Flat
Key dates
- Submitted
- 17 Sept 2026
- Validated
- 17 Sept 2026
- Comments close
- 15 Oct 2026
- Target decision
- 12 Nov 2026
Estimated project value
£37k–£100k
Typical UK cost for this job type, at inner London rates (2026). Estimated from the proposal description — planning applications do not state build cost. Source: Checkatrade 2026 loft conversion cost guide.
Recently sold nearby
Inside the two years most owners do their major work — kitchens, bathrooms, rewires and lofts.
- 27D BELSIZE SQUARE, LONDON, NW3 4HUFlat or maisonette · Leasehold · £862,5007 months ago30 Jan 2026
- 27C BELSIZE SQUARE, LONDON, NW3 4HUFlat or maisonette · Leasehold · £594,0002 years ago31 May 2024
- 27B BELSIZE SQUARE, LONDON, NW3 4HUFlat or maisonette · Leasehold · £675,0002 years ago31 May 2024
- 27 BELSIZE SQUARE, LONDON, NW3 4HUOther · Not a standard market sale · £1,0002 years ago31 May 2024
- TOP FLOOR MAISONETTE, 23 BELSIZE SQUARE, LONDON, NW3 4HUFlat or maisonette · Leasehold · £1,550,0003 years ago30 Nov 2022
- FIRST FLOOR FLAT, 23 BELSIZE SQUARE, LONDON, NW3 4HUFlat or maisonette · Leasehold · Not a standard market sale · £870,0005 years ago2 Mar 2021
- GROUND FLOOR FLAT, 23 BELSIZE SQUARE, LONDON, NW3 4HUFlat or maisonette · Leasehold · £645,0006 years ago18 Jun 2020
- GARDEN FLAT, 26 BELSIZE SQUARE, LONDON, NW3 4HUFlat or maisonette · Leasehold · £2,034,2806 years ago2 Dec 2019
Homes here go for about £768,750 — the median of the last 6 market sales in NW3 4HU, £594,000 to £2,034,280.
Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0. Sales are matched by postcode, not by property, so a sale listed here may be a neighbouring address. England and Wales only.
Planning constraints
No designations recorded at this location. This is not a formal search — always confirm with the local authority before relying on it.
Designations from planning.data.gov.uk, Open Government Licence v3.0. Indicative only — not a formal local authority search.
Nearby applications
- Belsize Square Camden NW3 4HUPendingNext door
- 26 Belsize Square Camden NW3 4HUPermittedNext door
- 22 Belsize Square London NW3 4HUUnknownNext door
- 27 Belsize Square Camden NW3 4HUPermittedAdjoining
- 27 Belsize Square London Camden NW3 4HUPermitted44 yd
- 27 Belsize Square London Camden NW3 4HUPermitted44 yd