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Permitted26/1091/HSESubmitted 7 months agoRear extension

Fairfield Avenue Barnet NW4 3TN

Single Storey Rear Extension 3M

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Progress

Submitted
23 Mar 2026
— completed
Validated
23 Mar 2026
— completed
Consultation
—
— completed
Target date
18 May 2026
— completed
Decided
13 May 2026
— completed

Application details

Reference
26/1091/HSE
Local authority
Barnet
Postcode
NW4 3TN
Ward
WH22
Application type
Householder
Property type
House

Key dates

Submitted
23 Mar 2026
Validated
23 Mar 2026
Target decision
18 May 2026
Decided
13 May 2026

Estimated project value

£25k–£41k

Based on the 10.0m² of floor area stated in the application, at inner London rates (2026). Source: FMB / Checkatrade 2026, single-storey extension £1,800-£3,000/m².

Floor area gained: 10m²

Recently sold nearby

Nothing on this postcode has changed hands in the last two years. The sales below are for pricing rather than a lead.

Homes here go for about £323,000 — the median of the last 5 market sales in NW4 3TN, £135,500 to £630,000.

Contains HM Land Registry data © Crown copyright and database right 2019. 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