3A Allandale Avenue London Borough of Barnet N3 3PJ
Roof extension involving rear dormer window with juliette balcony and 2no. front facing rooflights. Upper ground floor side extension with 1no. rooflight. Replacement of windows and doors with double glazing. Conversion of the existing garage into habitable room. Creation of a lightwell by filling up part of the existing driveway ramp to lower ground, floor. Removal of side chimney. Installation of 3no external air conditioning units. Demolition of the existing upper ground floor rear conservatory. (amended description)
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Progress
Application details
- Reference
- 22/6016/HSE
- Local authority
- Barnet
- Postcode
- N3 3PJ
- Ward
- FC22
- Application type
- Householder
- Property type
- House
Key dates
- Submitted
- 20 Dec 2022
- Validated
- 20 Dec 2022
- Comments close
- 13 Jan 2023
- Target decision
- 14 Feb 2023
- Decided
- 14 Feb 2023
Estimated project value
£120k–£250k
Based on the 74.2m² of floor area stated in the application, at inner London rates (2026). Source: Checkatrade 2026, loft conversion £1,200-£2,500/m².
Floor area gained: 74.2m² · 2 additional bedrooms
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
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