9 Warwick Street Westminster W1B 5LZ
Removal of single mansard and raising of front parapet wall in association with creation of additional floor level with a new mansard roof. Use of part basement, first, second, third and fourth floors from offices (Class B1) to five dwellings (Class C3). Use of part basement from retail (Class A1) to residential common areas (Class C3) including bicycle and refuse storage. New shop front to ground floor, replacement of all timber sash windows and the creation of a roof terrace at rear second floor level.
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Progress
Application details
- Reference
- 15/00459/FULL
- Local authority
- Westminster
- Postcode
- W1B 5LZ
- Ward
- WEST END
- Application type
- All Other
- Property type
- Commercial
Key dates
- Decided
- 31 Mar 2015
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. 8 recent sales are listed below.
- FLAT 22, 22 PARK CRESCENT, LONDON, W1B 1PDFlat or maisonette · Leasehold · £757,5003 months ago18 May 2026
- 26 KINGLY STREET, LONDON, W1B 5QDOther · Leasehold · Not a standard market sale · £300,0004 months ago1 May 2026
- FLAT 7, 7 PORTLAND PLACE, LONDON, W1B 1PWOther · Leasehold · Not a standard market sale · £5,000,0009 months ago1 Dec 2025
- UNIT G15 KINGLY COURT, LONDON, W1B 5PWOther · Leasehold · Not a standard market sale · £104,50011 months ago30 Sept 2025
- FLAT 2, 88 PORTLAND PLACE, LONDON, W1B 1NXFlat or maisonette · Leasehold · £1,015,00013 months ago7 Aug 2025
- FLAT A, 82 PORTLAND PLACE, LONDON, W1B 1NSFlat or maisonette · Leasehold · Not a standard market sale · £4,600,00015 months ago6 Jun 2025
- FLAT 11, 22 PARK CRESCENT, LONDON, W1B 1PDFlat or maisonette · Leasehold · £1,000,00017 months ago24 Mar 2025
- FLAT 44, 88 PORTLAND PLACE, LONDON, W1B 1NXFlat or maisonette · Leasehold · £275,00017 months ago17 Mar 2025
Homes here go for about £878,750 — the median of the last 4 market sales in W1B (the wider postcode district), £275,000 to £1,015,000.
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
- 9 Warwick Street Westminster W1B 5LZPermittedNext door
- 10 Warwick Street Westminster W1B 5LZRefusedNext door
- Warwick Street City Of Westminster W1B 5LZWithdrawnNext door
- 10 Warwick Street Westminster W1B 5LZRefusedNext door
- 10 Warwick Street Westminster W1B 5LZPendingNext door
- WestminsterPermittedNext door