4 Chester Square Westminster SW1W 9HH
Excavation of single storey basement; infilling of rear lightwell at lower ground and ground floor level with glass structure; extension of closet wing at first floor level and formation of new stone coping to parapet; refurbishment of first floor terrace including installation of new privacy screening and link bridge; installation of plant machinery at third floor level to rear and main roof level; lowering of front vaults; demolition and rebuilding of mews elevation; and associated external alterations.
Tracking, tags and letters are part of the paid plan. See what it costs. Searching and reading any record stays free.
Progress
Application details
- Reference
- 21/03786/FULL
- Local authority
- Westminster
- Postcode
- SW1W 9HH
- Ward
- KBC_02
- Application type
- All Other
- Property type
- House
Key dates
- Submitted
- 7 Jun 2021
- Validated
- 7 Jun 2021
- Comments close
- 3 Oct 2021
- Target decision
- 2 Aug 2021
- Decided
- 30 Sept 2021
Estimated project value
£2975k–£4465k
Based on the 551m² of floor area stated in the application, at inner London rates (2026). Source: trade estimate, basement £4,000-£6,000/m².
Floor area gained: 551.3m²
Recently sold nearby
Inside the two years most owners do their major work — kitchens, bathrooms, rewires and lofts.
- 8 CHESTER SQUARE, LONDON, SW1W 9HHTerraced · £11,300,0007 months ago10 Feb 2026
- 4 CHESTER SQUARE, LONDON, SW1W 9HHTerraced · Not a standard market sale · £9,250,0005 years ago31 Dec 2020
- 4 CHESTER SQUARE, LONDON, SW1W 9HHOther · Not a standard market sale · £8,500,0016 years ago18 Aug 2020
- 2 CHESTER SQUARE, LONDON, SW1W 9HHTerraced · £8,000,0007 years ago12 Apr 2019
- 13 CHESTER SQUARE, LONDON, SW1W 9HHOther · Not a standard market sale · £2,815,00010 years ago21 Jul 2016
- 1 CHESTER SQUARE, LONDON, SW1W 9HHTerraced · £8,700,00015 years ago25 Feb 2011
- 11 CHESTER SQUARE, LONDON, SW1W 9HHTerraced · £12,750,00018 years ago12 Sept 2008
- 10 CHESTER SQUARE, LONDON, SW1W 9HHTerraced · £15,000,00018 years ago18 Jul 2008
Homes here go for about £11,300,000 — the median of the last 5 market sales in SW1W 9HH, £8,000,000 to £15,000,000.
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
- 4 Chester Square Westminster SW1W 9HHPermittedNext door
- 4 Chester Square Westminster SW1W 9HHPermittedNext door
- 4 Chester Square Westminster SW1W 9HHPermittedNext door
- 4 Chester Square Westminster SW1W 9HHPermittedNext door
- 5 Chester Square Westminster SW1W 9HHRefusedNext door
- 4 Chester Square Westminster SW1W 9HHPermittedNext door