15 Thornfield Avenue London Borough of Barnet NW7 1LT
Single storey side and rear extension including new patio, associated screening and steps following demolition of existing garage and store rooms (amended drawings).
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Progress
Application details
- Reference
- 23/1926/HSE
- Local authority
- Barnet
- Postcode
- NW7 1LT
- Ward
- FC22
- Application type
- Householder
- Property type
- House
Key dates
- Submitted
- 3 May 2023
- Validated
- 3 May 2023
- Target decision
- 28 Jun 2023
- Decided
- 18 Jul 2023
Estimated project value
£130k–£215k
Based on the 53.0m² 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: 53m²
Recently sold nearby
Inside the two years most owners do their major work — kitchens, bathrooms, rewires and lofts.
- 25 THORNFIELD AVENUE, LONDON, NW7 1LTSemi-detached · £1,300,00012 months ago16 Oct 2025
- 15 THORNFIELD AVENUE, LONDON, NW7 1LTSemi-detached · £857,5003 years ago26 Apr 2023
- 5 THORNFIELD AVENUE, LONDON, NW7 1LTSemi-detached · £690,0008 years ago21 Aug 2018
- 7 THORNFIELD AVENUE, LONDON, NW7 1LTSemi-detached · £905,00010 years ago9 Sept 2016
- 7 THORNFIELD AVENUE, LONDON, NW7 1LTSemi-detached · £541,10012 years ago12 Sept 2014
- 23 THORNFIELD AVENUE, LONDON, NW7 1LTSemi-detached · £472,50015 years ago30 Sept 2011
- 25 THORNFIELD AVENUE, LONDON, NW7 1LTSemi-detached · £475,00015 years ago22 Jul 2011
- 13 THORNFIELD AVENUE, LONDON, NW7 1LTSemi-detached · £380,00015 years ago9 Nov 2010
Homes here go for about £615,550 — the median of the last 8 market sales in NW7 1LT, £380,000 to £1,300,000.
Contains HM Land Registry data © Crown copyright and database right 2025. 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
- 21 Thornfield Avenue London Borough of Barnet NW7 1LTPermittedAdjoining
- 21 Thornfield Avenue London Borough of Barnet NW7 1LTPermittedAdjoining
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