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. Internal alterations including, installation of lift from basement to second floor level and alterations to plan form.
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
- 21/03787/LBC
- 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
- 10 Jul 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