26 Seymour Street 1 Quebec Mews Westminster W1H 7JA
Alterations to 26 Seymour Street including demolition and reconstruction of front facade at first floor and above, infilling of rear yard at basement and ground floor level to provide additional office accommodation (Class B1), use of the first to fourth floors as 2x1 bed flats and 1x3 bed maisonettes, and new plant at rear first floor level. Erection of a parapet wall on the boundary between 1 Quebec Mews and 26 Seymour Street (Site includes 1 Quebec Mews)
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Progress
Application details
- Reference
- 09/00056/FULL
- Local authority
- Westminster
- Postcode
- W1H 7JA
- Ward
- BRYANSTON AND DORSET SQUARE
- Application type
- All Other
- Property type
- Flat
Key dates
- Decided
- 21 May 2009
Estimated project value
£135k–£340k
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: trade estimate.
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 8, CRANFIELD COURT HOMER STREET, LONDON, W1H 4NBFlat or maisonette · Leasehold · £485,0002 months ago19 Jun 2026
- 18 BRYANSTON MEWS WEST, LONDON, W1H 2DDFlat or maisonette · Leasehold · £1,825,0002 months ago17 Jun 2026
- FLAT D, 30 UPPER MONTAGU STREET, LONDON, W1H 1RPFlat or maisonette · Leasehold · £860,0003 months ago9 Jun 2026
- BASEMENT FLAT, 13 WYNDHAM PLACE, LONDON, W1H 2PYFlat or maisonette · Leasehold · £805,0003 months ago5 Jun 2026
- FLAT 32, CRANFIELD COURT HOMER STREET, LONDON, W1H 4NFFlat or maisonette · Leasehold · Not a standard market sale · £350,0004 months ago8 May 2026
- FLAT 6, 14 - 15 MOLYNEUX STREET, LONDON, W1H 5HQFlat or maisonette · Leasehold · £570,0004 months ago8 May 2026
- 7 TARRANT PLACE, LONDON, W1H 1ADTerraced · Leasehold · £1,550,0004 months ago29 Apr 2026
- 2, 114 SEYMOUR PLACE, LONDON, W1H 1NNFlat or maisonette · Leasehold · £375,0005 months ago27 Mar 2026
Homes here go for about £805,000 — the median of the last 7 market sales in W1H (the wider postcode district), £375,000 to £1,825,000.
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
- 26 Seymour Street Westminster W1H 7JAPermittedNext door
- 26 Seymour Street Westminster W1H 7JAPendingNext door
- 1 Quebec Mews Westminster W1H 7NXPermittedNext door
- 28-30 Seymour Street Westminster W1H 7JBPermittedNext door
- 23 New Quebec Street Westminster W1H 7SDPermittedNext door
- 23 New Quebec Street Westminster W1H 7SDPermittedNext door