12 Portsdown Avenue Barnet NW11 0N
Alterations to roof including side and rear dormers and rooflights to the front elevation to facilitate formation of self contained residential flat in roof space.
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Progress
Application details
- Reference
- F/01680/11
- Local authority
- Barnet
- Postcode
- NW11 0N
- Ward
- GOLDERS GREEN
- Application type
- All Other
- Property type
- Flat
Key dates
- Decided
- 7 Jun 2011
Estimated project value
£37k–£100k
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: Checkatrade 2026 loft conversion cost guide.
Recently sold nearby
New owners, recently moved in. First work on a house usually follows within months of completing. 8 recent sales are listed below.
- FIRST FLOOR FLAT, 7 MURRAY STREET, LONDON, NW1 9REFlat or maisonette · Leasehold · £422,0002 months ago21 Aug 2026
- 63A ALBANY STREET, LONDON, NW1 4BTFlat or maisonette · Leasehold · £400,0002 months ago14 Aug 2026
- FLAT 22, WESTERHAM BAYHAM STREET, LONDON, NW1 0JUFlat or maisonette · Leasehold · Not a standard market sale · £405,0002 months ago11 Aug 2026
- FLAT 5, RAVENSCAR BAYHAM STREET, LONDON, NW1 0BSFlat or maisonette · Leasehold · £565,5002 months ago11 Aug 2026
- APARTMENT 17, ELIZABETH COURT, 1 PALGRAVE GARDENS, LONDON, NW1 6EJFlat or maisonette · Leasehold · £890,0002 months ago7 Aug 2026
- 3C BEATTY STREET, LONDON, NW1 7LNFlat or maisonette · Leasehold · £610,0002 months ago31 Jul 2026
- FLAT 6, HAWKSHEAD STANHOPE STREET, LONDON, NW1 3RJFlat or maisonette · Leasehold · £510,0002 months ago30 Jul 2026
- 9B SHARPLESHALL STREET, LONDON, NW1 8YNFlat or maisonette · Leasehold · £465,0002 months ago29 Jul 2026
Homes here go for about £510,000 — the median of the last 7 market sales in NW1 (the wider postcode district), £400,000 to £890,000.
Contains HM Land Registry data © Crown copyright and database right 2026. 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
- 10 Portsdown Avenue London Borough of Barnet NW11 0NBPermittedNext door
- 14 Portsdown Avenue London Borough of Barnet NW11 0NDPermittedNext door
- London Borough of BarnetPermittedAdjoining
- 4 Portsdown Avenue London Borough of Barnet NW11 0NBPendingAdjoining
- Highcroft Gardens Barnet NW11 0LYPermittedAdjoining
- 3 Highcroft Gardens London Borough of Barnet NW11 0LYPermittedAdjoining