20 Rowsley Avenue London Borough of Barnet NW4 1AJ
Single storey rear extension with 2no. rooflights
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Progress
Application details
- Reference
- 25/1286/FUL
- Local authority
- Barnet
- Postcode
- NW4 1AJ
- Ward
- HD22
- Application type
- All Other
- Property type
- House
Key dates
- Submitted
- 26 Mar 2025
- Validated
- 26 Mar 2025
- Target decision
- 21 May 2025
- Decided
- 7 May 2025
Estimated project value
£46k–£77k
Based on the 19.0m² 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: 19m²
Recently sold nearby
Inside the two years most owners do their major work — kitchens, bathrooms, rewires and lofts.
- 40 ROWSLEY AVENUE, LONDON, NW4 1AJSemi-detached · £850,00020 months ago6 Jan 2025
- 20 ROWSLEY AVENUE, LONDON, NW4 1AJOther · Not a standard market sale · £1,5002 years ago31 Jan 2024
- GROUND FLOOR FLAT, 20 ROWSLEY AVENUE, LONDON, NW4 1AJFlat or maisonette · Leasehold · £370,0002 years ago31 Jan 2024
- 54 ROWSLEY AVENUE, LONDON, NW4 1AJTerraced · £400,0003 years ago14 Jul 2023
- 62 ROWSLEY AVENUE, LONDON, NW4 1AJDetached · £935,0005 years ago9 Aug 2021
- 6A ROWSLEY AVENUE, LONDON, NW4 1AJFlat or maisonette · Leasehold · £445,0005 years ago25 May 2021
- 32 ROWSLEY AVENUE, LONDON, NW4 1AJTerraced · £678,0007 years ago27 Nov 2018
- 20 ROWSLEY AVENUE, LONDON, NW4 1AJFlat or maisonette · Leasehold · £440,0008 years ago8 Jun 2018
Homes here go for about £445,000 — the median of the last 7 market sales in NW4 1AJ, £370,000 to £935,000.
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
- 22 Rowsley Avenue London Borough of Barnet NW4 1AJRefusedNext door
- 22 Rowsley Avenue London Borough of Barnet NW4 1AJPermittedNext door
- 16 Rowsley Avenue London Borough of Barnet NW4 1AJPermittedNext door
- 13 Rowsley Avenue London Borough of Barnet NW4 1APPermittedAdjoining
- 13 Rowsley Avenue London Borough of Barnet NW4 1APRefused46 yd
- 17 Downage London Borough of Barnet NW4 1ASPermitted49 yd