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Refused25/4929/192Submitted 9 months agoLoft conversion

20 Derwent Avenue London Borough of Barnet EN4 8LX

Roof extension involving rear dormer window with juliette balcony

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Progress

Submitted
11 Dec 2025
— completed
Validated
11 Dec 2025
— completed
Consultation
—
— completed
Target date
5 Feb 2026
— completed
Decided
30 Dec 2025
— completed

Application details

Reference
25/4929/192
Local authority
Barnet
Postcode
EN4 8LX
Ward
BP22
Application type
All Other
Property type
House

Key dates

Submitted
11 Dec 2025
Validated
11 Dec 2025
Target decision
5 Feb 2026
Decided
30 Dec 2025

Estimated project value

£21k–£44k

Based on the 14.0m² of floor area stated in the application, at outer London rates (2026). Source: Checkatrade 2026, loft conversion £1,200-£2,500/m².

Floor area gained: 14m² · 1 additional bedrooms

Recently sold nearby

Inside the two years most owners do their major work — kitchens, bathrooms, rewires and lofts.

Homes here go for about £548,000 — the median of the last 8 market sales in EN4 8LX, £510,000 to £770,000.

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.

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