37 Cornwall Avenue London Borough of Barnet N3 1LG
Single storey rear extension following demolition of the existing sun room. Roof extension involving rear dormer windows and 4no. front facing rooflights
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Progress
Application details
- Reference
- 26/0945/HSE
- Local authority
- Barnet
- Postcode
- N3 1LG
- Ward
- WF22
- Application type
- Householder
- Property type
- House
Key dates
- Submitted
- 12 Mar 2026
- Validated
- 12 Mar 2026
- Comments close
- 3 Apr 2026
- Target decision
- 7 May 2026
- Decided
- 5 May 2026
Estimated project value
£65k–£135k
Based on the 40.0m² 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: 40m²
Recently sold nearby
Inside the two years most owners do their major work — kitchens, bathrooms, rewires and lofts.
- FLAT 2, 24 CORNWALL AVENUE, LONDON, N3 1LGFlat or maisonette · Leasehold · £499,9997 months ago30 Jan 2026
- 39 CORNWALL AVENUE, LONDON, N3 1LGTerraced · £985,0002 years ago25 Jun 2024
- FLAT 1, 24 CORNWALL AVENUE, LONDON, N3 1LGFlat or maisonette · Leasehold · £494,0004 years ago28 Feb 2022
- 28 CORNWALL AVENUE, LONDON, N3 1LGTerraced · £715,0009 years ago2 Feb 2017
- FLAT 2, 24 CORNWALL AVENUE, LONDON, N3 1LGFlat or maisonette · Leasehold · £525,0009 years ago16 Dec 2016
- FLAT 1, 24 CORNWALL AVENUE, LONDON, N3 1LGFlat or maisonette · Leasehold · £525,00010 years ago12 Aug 2016
- 24 CORNWALL AVENUE, LONDON, N3 1LGTerraced · Not a standard market sale · £525,00011 years ago12 Mar 2015
- LOWER MAISONETTE, 26 CORNWALL AVENUE, LONDON, N3 1LGFlat or maisonette · Leasehold · £290,00013 years ago14 Feb 2013
Homes here go for about £525,000 — the median of the last 7 market sales in N3 1LG, £290,000 to £985,000.
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
- 37 Cornwall Avenue London Borough of Barnet N3 1LGWithdrawnNext door
- 37 Cornwall Avenue London Borough of Barnet N3 1LGRefusedNext door
- Cornwall Avenue Barnet N3 1LGPermittedNext door
- 37 Cornwall Avenue London Borough of Barnet N3 1LGRefusedNext door
- 39 Cornwall Avenue London Borough of Barnet N3 1LGPermittedNext door
- 39 Cornwall Avenue London Borough of Barnet N3 1LGPendingNext door