31 Thornhill Road Islington N1 1JR
Demolition of two storey rear extension and erection of full-width lower ground and part width ground floor rear extension; excavation to form extra basement level at rear of property; formation of steps within front lightwell to provide access to lower ground floor with railings and other alterations; formation of new window opening in flank elevation.
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Progress
Application details
- Reference
- P2017/4388/FUL
- Local authority
- Islington
- Postcode
- N1 1JR
- Ward
- Bow East
- Application type
- All Other
- Property type
- House
Key dates
- Submitted
- 6 Nov 2017
- Validated
- 6 Nov 2017
- Comments close
- 14 Dec 2017
- Target decision
- 1 Jan 2018
- Decided
- 15 Dec 2017
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. 4 recent sales are listed below.
- FLAT C, 21 THORNHILL ROAD, LONDON, N1 1JRFlat or maisonette · Leasehold · £450,0008 months ago12 Feb 2026
- FLAT C, 21 THORNHILL ROAD, LONDON, N1 1JRFlat or maisonette · Leasehold · £338,00010 months ago17 Dec 2025
- 19A THORNHILL ROAD, LONDON, N1 1JRFlat or maisonette · Leasehold · £1,065,00016 months ago12 Jun 2025
- FLAT A, 21 THORNHILL ROAD, LONDON, N1 1JRFlat or maisonette · Leasehold · £455,00017 months ago19 May 2025
- 29 THORNHILL ROAD, LONDON, N1 1JRDetached · £2,200,0003 years ago31 May 2023
- 19A THORNHILL ROAD, LONDON, N1 1JRFlat or maisonette · Leasehold · £800,0006 years ago17 Jan 2020
- 19A THORNHILL ROAD, LONDON, N1 1JRFlat or maisonette · Leasehold · £840,0007 years ago9 Jul 2019
- 31 THORNHILL ROAD, LONDON, N1 1JRTerraced · £2,309,00010 years ago29 Feb 2016
Homes here go for about £820,000 — the median of the last 8 market sales in N1 1JR, £338,000 to £2,309,000.
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
- 31 Thornhill Road Islington N1 1JRPendingNext door
- 31 Thornhill Road Islington N1 1JRPendingNext door
- 31 Thornhill Road Islington N1 1JRPermittedNext door
- 31 Thornhill Road Islington N1 1JRPermittedNext door
- 31 Thornhill Road Islington N1 1JRPermittedNext door
- 31 Thornhill Road Islington N1 1JRPendingNext door