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Permitted25/4254/PNHSubmitted 10 months agoRear extension

12 Marlborough Avenue London Borough of Barnet HA8 8UH

Single storey rear extension with a proposed depth of 6.00m, maximum height of 3.00m and eaves height of 2.70m

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Progress

Submitted
24 Oct 2025
— completed
Validated
24 Oct 2025
— completed
Consultation
—
— completed
Target date
5 Dec 2025
— completed
Decided
27 Nov 2025
— completed

Application details

Reference
25/4254/PNH
Local authority
Barnet
Postcode
HA8 8UH
Ward
EY22
Application type
Prior Approval
Property type
House

Key dates

Submitted
24 Oct 2025
Validated
24 Oct 2025
Target decision
5 Dec 2025
Decided
27 Nov 2025

Estimated project value

£75k–£125k

Based on the 33.0m² of floor area stated in the application, at outer London rates (2026). Source: FMB / Checkatrade 2026, single-storey extension £1,800-£3,000/m².

Floor area gained: 33m²

Recently sold nearby

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

Homes here go for about £544,000 — the median of the last 7 market sales in HA8 8UH, £340,750 to £610,000.

Contains HM Land Registry data © Crown copyright and database right 2024. 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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