12 Allandale Avenue London Borough of Barnet N3 3PJ
Non-material amendments to planning permission reference 21/6076/HSE dated 26/01/22 for 'Part single part two storey rear extension. Conversion of garage into habitable space, replacement of exiting garage door with window.' Amendments include ground floor rear elevation sliding doors, addition of ground floor side elevation window, amendment to first floor rear glazing to proposed extension (no change to footprint or volume of first floor extension as per granted application), enlarge existing front elevation first floor window from 2 panel to 3 panel to match existing windows to front elevation
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Progress
Application details
- Reference
- 22/1796/NMA
- Local authority
- Barnet
- Postcode
- N3 3PJ
- Ward
- FC
- Application type
- All Other
- Property type
- House
Key dates
- Submitted
- 5 Apr 2022
- Validated
- 5 Apr 2022
- Target decision
- 3 May 2022
- Decided
- 26 Apr 2022
Estimated project value
£75k–£175k
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: FMB / Checkatrade 2026, £2,000-£2,800/m² over a larger floor area.
Recently sold nearby
Inside the two years most owners do their major work — kitchens, bathrooms, rewires and lofts. 2 recent sales are listed below.
- 2A ALLANDALE AVENUE, LONDON, N3 3PJDetached · £1,675,00016 months ago29 Apr 2025
- 22 ALLANDALE AVENUE, LONDON, N3 3PJDetached · £2,600,00017 months ago24 Mar 2025
- 26 ALLANDALE AVENUE, LONDON, N3 3PJDetached · £2,725,0003 years ago22 Jun 2023
- FAIRVIEW, 3A ALLANDALE AVENUE, LONDON, N3 3PJDetached · £1,950,0003 years ago21 Oct 2022
- 30 ALLANDALE AVENUE, LONDON, N3 3PJDetached · £3,495,0004 years ago5 Nov 2021
- 12 ALLANDALE AVENUE, LONDON, N3 3PJDetached · £2,030,0004 years ago24 Sept 2021
- 8 ALLANDALE AVENUE, LONDON, N3 3PJDetached · £1,850,0005 years ago12 Feb 2021
- 40 ALLANDALE AVENUE, LONDON, N3 3PJSemi-detached · £1,585,0005 years ago30 Sept 2020
Homes here go for about £1,990,000 — the median of the last 8 market sales in N3 3PJ, £1,585,000 to £3,495,000.
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
- 12 Allandale Avenue London Borough of Barnet N3 3PJPermittedNext door
- 8 Allandale Avenue London Borough of Barnet N3 3PJRefusedAdjoining
- 8 Allandale Avenue London Borough of Barnet N3 3PJRefusedAdjoining
- 14 Chessington Avenue Barnet N3 3DPPermitted52 yd
- 22 Chessington Avenue London Borough of Barnet N3 3DPPermitted74 yd
- 28 Chessington Avenue London Borough of Barnet N3 3DPPermitted99 yd