21 Marne Avenue London Borough of Barnet N11 1JU
Roof extension involving rear dormer window and 2no. front facing rooflights
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Progress
Application details
- Reference
- 26/1800/192
- Local authority
- Barnet
- Postcode
- N11 1JU
- Ward
- BP22
- Application type
- All Other
- Property type
- House
Key dates
- Submitted
- 13 May 2026
- Validated
- 13 May 2026
- Target decision
- 8 Jul 2026
- Decided
- 24 Jun 2026
Estimated project value
£37k–£77k
Based on the 22.8m² of floor area stated in the application, at inner London rates (2026). Source: Checkatrade 2026, loft conversion £1,200-£2,500/m².
Floor area gained: 22.8m² · 2 additional bedrooms
Recently sold nearby
New owners, recently moved in. First work on a house usually follows within months of completing. 4 recent sales are listed below.
- 42 MARNE AVENUE, LONDON, N11 1JUTerraced · £530,000last month20 Jul 2026
- 28 MARNE AVENUE, LONDON, N11 1JUTerraced · £525,0008 months ago22 Dec 2025
- 16 MARNE AVENUE, LONDON, N11 1JUTerraced · £560,00012 months ago20 Aug 2025
- 17 MARNE AVENUE, LONDON, N11 1JUTerraced · £585,00017 months ago24 Mar 2025
- 8 MARNE AVENUE, LONDON, N11 1JUTerraced · Not a standard market sale · £444,0002 years ago16 May 2024
- 18 MARNE AVENUE, LONDON, N11 1JUTerraced · £490,0002 years ago20 Dec 2023
- 4 MARNE AVENUE, LONDON, N11 1JUTerraced · £475,0002 years ago13 Nov 2023
- 32 MARNE AVENUE, LONDON, N11 1JUTerraced · £475,0003 years ago30 Sept 2022
Homes here go for about £525,000 — the median of the last 7 market sales in N11 1JU, £475,000 to £585,000.
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
- 22 Marne Avenue London Borough of Barnet N11 1JUPermittedNext door
- 96 Oakleigh Road South London Borough of Barnet N11 1LBPermittedAdjoining
- 29 Marne Avenue London Borough of Barnet N11 1JUWithdrawnAdjoining
- 7 Spencer Road London Borough of Barnet N11 1JXPermittedAdjoining
- 29 Marne Avenue London Borough of Barnet N11 1JUPermittedAdjoining
- 92 Oakleigh Road South London Borough of Barnet N11 1LBPermittedAdjoining