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Permitted25/4255/HSESubmitted 10 months agoSide extension

12 Marlborough Avenue London Borough of Barnet HA8 8UH

Front porch extension including the relocation of the front door and new access steps. First floor side extension and alterations to the existing roof

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Progress

Submitted
24 Oct 2025
— completed
Validated
24 Oct 2025
— completed
Consultation
—
— completed
Target date
19 Dec 2025
— completed
Decided
13 Jan 2026
— completed

Application details

Reference
25/4255/HSE
Local authority
Barnet
Postcode
HA8 8UH
Ward
EY22
Application type
Householder
Property type
House

Key dates

Submitted
24 Oct 2025
Validated
24 Oct 2025
Target decision
19 Dec 2025
Decided
13 Jan 2026

Estimated project value

£16k–£27k

Based on the 7.0m² 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: 7m²

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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