British Columbia House, 1-3 Regent Street Westminster SW1Y 4NR
External alterations including rebuilding of existing sixth floor double mansard, alterations to Regent Street and Charles II Street elevations, two full height infill extensions to rear lightwell and erection of roof plant and screening in connection with refurbishment of building and reconfiguration of existing Class A1 retail at lower ground, ground and mezzanine levels Class B1 office floorspace at lower ground and first to sixth floors.
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Progress
Application details
- Reference
- 12/05060/FULL
- Local authority
- Westminster
- Postcode
- SW1Y 4NR
- Ward
- ST. JAMES'S
- Application type
- All Other
- Property type
- Commercial
Key dates
- Decided
- 10 Aug 2012
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
Inside the two years most owners do their major work — kitchens, bathrooms, rewires and lofts. 8 recent sales are listed below.
- FLAT 6, BRAY HOUSE DUKE OF YORK STREET, LONDON, SW1Y 6JXFlat or maisonette · Leasehold · £675,0006 months ago13 Feb 2026
- FLAT 33, BANK CHAMBERS, 25 JERMYN STREET, LONDON, SW1Y 6HRFlat or maisonette · Leasehold · £1,175,0006 months ago12 Feb 2026
- FLAT 8, NORWAY HOUSE, 21 - 24 COCKSPUR STREET, LONDON, SW1Y 5BNFlat or maisonette · Leasehold · £1,405,0037 months ago6 Feb 2026
- FLAT 18, CRUSADER HOUSE, 14 PALL MALL, LONDON, SW1Y 5LUFlat or maisonette · Leasehold · £800,0008 months ago18 Dec 2025
- FLAT 7, 76 JERMYN STREET, LONDON, SW1Y 6NPFlat or maisonette · Leasehold · £450,0009 months ago21 Nov 2025
- APARTMENT 3, 42 PALL MALL, LONDON, SW1Y 5JGFlat or maisonette · Leasehold · £4,050,0009 months ago19 Nov 2025
- 8 OXENDON STREET, LONDON, SW1Y 4EETerraced · Not a standard market sale · £4,200,00016 months ago9 May 2025
- FLAT 19, DALMENY COURT, 8 DUKE STREET, LONDON, SW1Y 6BLFlat or maisonette · Leasehold · Not a standard market sale · £780,00016 months ago30 Apr 2025
Homes here go for about £987,500 — the median of the last 6 market sales in SW1Y (the wider postcode district), £450,000 to £4,050,000.
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
- WestminsterPermittedNext door
- 1, 3 Regent Street Westminster SW1Y 4NRPermittedNext door
- 1, 3 Regent Street City Of Westminster SW1Y 4NWPendingNext door
- 1, 3 Regent Street City Of Westminster SW1Y 4NWPermittedNext door
- 1, 3 Regent Street Westminster SW1Y 4NRPermittedNext door
- 1, 3 Regent Street Westminster SW1Y 4NRRefusedNext door