12 Belsize Park Camden NW3 4ES
Installation of dormer window in side roofslope and installation of french doors and balustrading at rear first floor level to create a terrace all in connection with conversion of first and second floor and roof level from 1 x 1-bedroom and 1 x 3-bedroom flats to a 1 x 4-bedroom flat (Class C3).
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Progress
Application details
- Reference
- 2011/5362/P
- Local authority
- Camden
- Postcode
- NW3 4ES
- Ward
- BELSIZE
- Application type
- All Other
- Property type
- Flat
Key dates
- Decided
- 17 Jul 2012
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. 4 recent sales are listed below.
- FLAT 4, 16 BELSIZE PARK, LONDON, NW3 4ESFlat or maisonette · Leasehold · £2,275,0008 months ago30 Jan 2026
- 10A BELSIZE PARK, LONDON, NW3 4ESFlat or maisonette · Leasehold · £2,000,00015 months ago17 Jul 2025
- 10A BELSIZE PARK, LONDON, NW3 4ESOther · Leasehold · Not a standard market sale · £10,00015 months ago17 Jul 2025
- FLAT 3, 11 BELSIZE PARK, LONDON, NW3 4ESFlat or maisonette · Leasehold · £1,350,00019 months ago20 Mar 2025
- GARDEN FLAT, 14 BELSIZE PARK, LONDON, NW3 4ESFlat or maisonette · Leasehold · £2,470,0002 years ago5 Jul 2024
- FLAT 3, 9 BELSIZE PARK, LONDON, NW3 4ESFlat or maisonette · Leasehold · £610,0002 years ago26 Mar 2024
- FLAT 4, CLARIDGE HOUSE, 13 BELSIZE PARK, LONDON, NW3 4ESFlat or maisonette · Leasehold · £721,5003 years ago20 Oct 2023
- FLAT 4, 14 BELSIZE PARK, LONDON, NW3 4ESFlat or maisonette · Leasehold · £745,0003 years ago23 Jun 2023
Homes here go for about £1,350,000 — the median of the last 7 market sales in NW3 4ES, £610,000 to £2,470,000.
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
- 11 Belsize Park Camden NW3 4ESPermittedNext door
- Claridge House 13 Belsize Park London NW3 4ESUnknownNext door
- Belsize Park Camden NW3 4ESPendingNext door
- 14 Belsize Park Camden NW3 4ESRefusedAdjoining
- 14 Belsize Park Camden NW3 4ESPermittedAdjoining
- 14 Belsize Park Camden NW3 4ESPermittedAdjoining