31 Sefton Avenue London Borough of Barnet NW7 3QB
Non material amendment to planning permission 25/3239/HSE dated 01/10/2025 for 'First floor side extension. Roof extension involving hip to gable, rear dormer with glass balustrade for the juliette balcony and 3no. front facing rooflights. Changes to roof tiles and fenestration' Amendments includes removal of existing chimney and adjustment to front facing rooflights
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Progress
Application details
- Reference
- 25/5113/NMA
- Local authority
- Barnet
- Postcode
- NW7 3QB
- Ward
- EW22
- Application type
- All Other
- Property type
- House
Key dates
- Submitted
- 19 Dec 2025
- Validated
- 19 Dec 2025
- Target decision
- 16 Jan 2026
- Decided
- 5 Jan 2026
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. 2 recent sales are listed below.
- 17 SEFTON AVENUE, LONDON, NW7 3QBSemi-detached · £850,00012 months ago21 Aug 2025
- 25 SEFTON AVENUE, LONDON, NW7 3QBSemi-detached · £1,025,00022 months ago6 Nov 2024
- 29 SEFTON AVENUE, LONDON, NW7 3QBSemi-detached · £881,5004 years ago25 Mar 2022
- 5 SEFTON AVENUE, LONDON, NW7 3QBSemi-detached · £560,0005 years ago25 Jun 2021
- 5 SEFTON AVENUE, LONDON, NW7 3QBSemi-detached · £500,0009 years ago27 Apr 2017
- 23 SEFTON AVENUE, LONDON, NW7 3QBSemi-detached · £650,00012 years ago15 Apr 2014
- 15 SEFTON AVENUE, LONDON, NW7 3QBSemi-detached · £507,50013 years ago8 Mar 2013
- 5A SEFTON AVENUE, LONDON, NW7 3QBSemi-detached · £330,00014 years ago25 May 2012
Homes here go for about £605,000 — the median of the last 8 market sales in NW7 3QB, £330,000 to £1,025,000.
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
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- 29 Sefton Avenue London Borough of Barnet NW7 3QBRefusedNext door
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