55, 57 Chiltern Street Westminster W1U 6ND
Demolition of existing mansard roof (Address: Flat 9, at 59 Chiltern Street (5th Floor) and Flat 7, 63 Chiltern Street (5th Floor) located above 55-65 Chiltern Street. W1U 6NF) and erection of an additional sheer storey to main facade together with a new mansard roof to create 6 self-contained flats (Class C3). (Increase of 4 flats) with new terraces/balconies.
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
- 23/06184/FULL
- Local authority
- Westminster
- Postcode
- W1U 6ND
- Ward
- MBW_22
- Application type
- All Other
- Property type
- Flat
Key dates
- Submitted
- 24 Nov 2023
- Validated
- 24 Nov 2023
- Comments close
- 9 Jan 2024
- Target decision
- 19 Jan 2024
- Decided
- 9 Oct 2024
Estimated project value
£330k–£690k
Based on the 204m² of floor area stated in the application, at inner London rates (2026). Source: Checkatrade 2026, loft conversion £1,200-£2,500/m².
Floor area gained: 204m²
Recently sold nearby
New owners, recently moved in. First work on a house usually follows within months of completing. 8 recent sales are listed below.
- THIRD FLOOR FLAT 5, 36 NOTTINGHAM PLACE, LONDON, W1U 5NTFlat or maisonette · Leasehold · £827,5003 months ago29 May 2026
- FLAT 9, 30 BLANDFORD STREET, LONDON, W1U 4BYFlat or maisonette · Leasehold · £1,500,0003 months ago19 May 2026
- 61, LUXBOROUGH TOWER LUXBOROUGH STREET, LONDON, W1U 5BNFlat or maisonette · Leasehold · £685,0003 months ago18 May 2026
- 209, BICKENHALL MANSIONS BICKENHALL STREET, LONDON, W1U 6BWFlat or maisonette · Leasehold · £1,300,0004 months ago5 May 2026
- 23 YORK STREET, LONDON, W1U 6PFOther · Leasehold · Not a standard market sale · £2,700,0004 months ago30 Apr 2026
- FLAT 18, ST ANDREWS MANSIONS DORSET STREET, LONDON, W1U 4EQFlat or maisonette · Leasehold · Not a standard market sale · £1,750,0005 months ago8 Apr 2026
- PARKING SPACE 10, BICKENHALL MANSIONS BICKENHALL STREET, LONDON, W1U 6BXOther · Leasehold · Not a standard market sale · £85,0005 months ago30 Mar 2026
- FLAT 5, 43A CHILTERN STREET, LONDON, W1U 6LTFlat or maisonette · Leasehold · £1,175,0005 months ago27 Mar 2026
Homes here go for about £1,175,000 — the median of the last 5 market sales in W1U (the wider postcode district), £685,000 to £1,500,000.
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
- 59 Chiltern Street Westminster W1U 6NFPermittedNext door
- 55, 57 Chiltern Street Westminster W1U 6NDPermittedNext door
- 41 Paddington Street Westminster W1U 4HNPermittedNext door
- 67 Chiltern Street Westminster W1U 6NJPermittedAdjoining
- WestminsterPermittedAdjoining
- 49A Chiltern Street Westminster W1U 6LZPermittedAdjoining