69 Chiltern Street Westminster W1U 6NL
Erection of a mansard roof extension and extension of existing rear closet wing at second floor. Excavation/lowering of the existing basement floor level and rear courtyard to basement level and installation of retractable glass roof above at first floor. Installation of new windows to front and rear elevations and a flush walk-on rooflight over one of the existing front lightwells, and associated works, all in association with the continued use of the property as a single-family dwelling (Class C3).
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
- 20/00506/FULL
- Local authority
- Westminster
- Postcode
- W1U 6NL
- Ward
- MHC_02
- Application type
- All Other
- Property type
- House
Key dates
- Submitted
- 5 Feb 2020
- Validated
- 5 Feb 2020
- Comments close
- 14 Dec 2020
- Target decision
- 1 Apr 2020
- Decided
- 19 Mar 2021
Estimated project value
£37k–£100k
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: Checkatrade 2026 loft conversion cost guide.
Recently sold nearby
New owners, recently moved in. First work on a house usually follows within months of completing.
- 69 CHILTERN STREET, LONDON, W1U 6NLTerraced · Not a standard market sale · £5,000,0005 months ago27 Mar 2026
- 69 CHILTERN STREET, LONDON, W1U 6NLTerraced · £2,500,0007 years ago10 Oct 2018
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
- 69 Chiltern Street Westminster W1U 6NLPendingNext door
- 69 Chiltern Street Westminster W1U 6NLPermittedNext door
- 69 Chiltern Street Westminster W1U 6NLPermittedNext door
- 69 Chiltern Street Westminster W1U 6NLPermittedNext door
- 30 Paddington Street Westminster W1U 4HBPermittedNext door
- 30 Paddington Street Westminster W1U 4HBRefusedNext door