Fitzjohn's Avenue Camden NW3 5JY
The proposal consists of a single story rear extension to a lower ground floor Flat located at 29 A Fitzjohn's avenue, NW3 5JY. The proposals for the new rear extension are centred around providing more living space to the flat whilst at the same time ensure that good daylight is provided and overlooking is restricted. In response to the conservation area guidelines the design of the extension retains a view along the side to the property to enable glimpses of the garden beyond. The new extension will provide 34.6 sq.m of new gross internal area in a single storey with a flat roof to ensure its subservience to the main building. The neighbouring flat 29B has a bedroom with two windows next to the proposed extension. The side window would be blocked by this proposal but the scheme proposes to increase the size of the bedroom window facing the rear of the property within an existing archway. This will enhance the quality of the light entering the bedroom. Additionally, the proposal also includes a new balcony space for flat C above. Access will be provided through alternations made to an existing rear casement window. The new balcony will be the same width as the existing window. Following pre-planning advice the balcony will be painted steel. In addition, it is noted that the existing window will be able to retain it’s upper stained glass panels. Only the lower casements will need to be re-made so that they extend down to form French doors to the balcony level The applicant for this proposal owns the Freehold of the whole property. In addition, they own the Leasehold of flats 29A, 29B at the Lower Ground Level and 29C at the Upper Ground Level.
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Progress
Application details
- Reference
- 2025/3787/P
- Local authority
- Camden
- Postcode
- NW3 5JY
- Ward
- Belsize
- Application type
- All Other
- Property type
- Flat
Key dates
- Submitted
- 3 Sept 2025
- Validated
- 3 Sept 2025
- Comments close
- 5 Oct 2025
- Target decision
- 29 Oct 2025
- Decided
- 21 Oct 2025
Estimated project value
£84k–£140k
Based on the 34.6m² of floor area stated in the application, at inner London rates (2026). Source: FMB / Checkatrade 2026, single-storey extension £1,800-£3,000/m².
Floor area gained: 34.6m²
Recently sold nearby
New owners, recently moved in. First work on a house usually follows within months of completing. 5 recent sales are listed below.
- FLAT 16, DE LASZLO HOUSE, 3 - 7 FITZJOHNS AVENUE, LONDON, NW3 5JYFlat or maisonette · Leasehold · £1,760,0004 months ago16 Apr 2026
- 15D FITZJOHNS AVENUE, LONDON, NW3 5JYFlat or maisonette · Leasehold · £1,840,00013 months ago14 Jul 2025
- FLAT 14, DE LASZLO HOUSE, 3 - 7 FITZJOHNS AVENUE, LONDON, NW3 5JYFlat or maisonette · Leasehold · £2,190,00015 months ago21 May 2025
- FLAT C, 25 FITZJOHNS AVENUE, LONDON, NW3 5JYFlat or maisonette · Leasehold · £1,210,00017 months ago28 Mar 2025
- 37C FITZJOHNS AVENUE, LONDON, NW3 5JYTerraced · £8,200,00020 months ago8 Jan 2025
- FLAT 18, DE LASZLO HOUSE, 3 - 7 FITZJOHNS AVENUE, LONDON, NW3 5JYOther · Leasehold · Not a standard market sale · £3,350,0002 years ago17 Jun 2024
- FLAT 12, DE LASZLO HOUSE, 3 - 7 FITZJOHNS AVENUE, LONDON, NW3 5JYFlat or maisonette · Leasehold · £3,000,0002 years ago4 Jun 2024
- FLAT 4, 11 FITZJOHNS AVENUE, LONDON, NW3 5JYFlat or maisonette · Leasehold · £1,185,0003 years ago15 Aug 2023
Homes here go for about £1,840,000 — the median of the last 7 market sales in NW3 5JY, £1,185,000 to £8,200,000.
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
- 27 Fitzjohn's Avenue Camden NW3 5JYPermittedNext door
- Fitzjohn's Avenue Camden NW3 5JYPermittedNext door
- Fitzjohn's Avenue Camden NW3 5JYPermittedNext door
- Flat A 29 Fitzjohn's Avenue London NW3 5JYPendingAdjoining
- 31 Camden NW3 5JYPendingAdjoining
- 31 Fitzjohn's Avenue Camden NW3 5JYPermittedAdjoining