St Marys Avenue London Borough of Barnet N3 1SN
Demolition of existing front-side extension. Construction of new single storey side extension. Alterations to existing front entrance including new steps. Alterations to hard and soft landscaping including lowering level of rear garden and resurfacing of front driveway. New retaining walls to rear, new low level wall to front boundary, new timber boundary fences. New windows
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Progress
Application details
- Reference
- 18/1640/HSE
- Local authority
- Barnet
- Postcode
- N3 1SN
- Ward
- FC
- Application type
- Householder
- Property type
- House
Key dates
- Submitted
- 15 Mar 2018
- Validated
- 15 Mar 2018
- Target decision
- 10 May 2018
- Decided
- 9 May 2018
Estimated project value
£34k–£81k
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: MyJobQuote / Checkatrade 2026 extension rates.
Recently sold nearby
Inside the two years most owners do their major work — kitchens, bathrooms, rewires and lofts. 3 recent sales are listed below.
- 19 ST MARYS AVENUE, LONDON, N3 1SNSemi-detached · £1,350,00010 months ago19 Dec 2025
- FLAT E, 13 ST MARYS AVENUE, LONDON, N3 1SNFlat or maisonette · Leasehold · £385,00011 months ago20 Nov 2025
- 1 ST MARYS AVENUE, LONDON, N3 1SNOther · Not a standard market sale · £22,63023 months ago22 Nov 2024
- 38 ST MARYS AVENUE, LONDON, N3 1SNSemi-detached · £1,185,0003 years ago30 Jun 2023
- 1D ST MARYS AVENUE, LONDON, N3 1SNFlat or maisonette · Leasehold · £396,0005 years ago12 Aug 2021
- 34 ST MARYS AVENUE, LONDON, N3 1SNSemi-detached · £875,0005 years ago25 Mar 2021
- 1 ST MARYS AVENUE, LONDON, N3 1SNOther · Not a standard market sale · £825,0005 years ago12 Mar 2021
- 3B ST MARYS AVENUE, LONDON, N3 1SNFlat or maisonette · Leasehold · £625,0005 years ago2 Feb 2021
Homes here go for about £750,000 — the median of the last 6 market sales in N3 1SN, £385,000 to £1,350,000.
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.
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