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 3, PARK HOUSE, 23 - 24 ENFORD STREET, LONDON, W1H 1DGFlat or maisonette · Leasehold · £885,0002 months ago12 Aug 2026
- FLAT 22, CRANFIELD COURT HOMER STREET, LONDON, W1H 4NEFlat or maisonette · Leasehold · £500,0002 months ago7 Aug 2026
- FLAT 31, LANDWARD COURT HARROWBY STREET, LONDON, W1H 5HBFlat or maisonette · Leasehold · Not a standard market sale · £415,0002 months ago4 Aug 2026
- FLAT 8, MACREADY HOUSE, 75 CRAWFORD STREET, LONDON, W1H 5LRFlat or maisonette · Leasehold · £785,0002 months ago4 Aug 2026
- FLAT 10, 64 SEYMOUR STREET, LONDON, W1H 5BWFlat or maisonette · Leasehold · £1,500,0002 months ago30 Jul 2026
- FLAT E, 34 UPPER MONTAGU STREET, LONDON, W1H 1RPFlat or maisonette · Leasehold · £820,0003 months ago27 Jul 2026
- FLAT 33, CRANFIELD COURT HOMER STREET, LONDON, W1H 4NFFlat or maisonette · Leasehold · £500,0003 months ago24 Jul 2026
- FLAT 6, 14 - 15 FITZHARDINGE STREET, LONDON, W1H 6EQFlat or maisonette · Leasehold · £2,367,0003 months ago22 Jul 2026
Homes here go for about £820,000 — the median of the last 7 market sales in W1H (the wider postcode district), £500,000 to £2,367,000.
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 7JAPermittedNext door
- 1 Quebec Mews Westminster W1H 7NXPermittedNext door
- 28-30 Seymour Street Westminster W1H 7JBPermittedNext door
- 23 New Quebec Street Westminster W1H 7SDPendingNext door
- 23 New Quebec Street Westminster W1H 7SDPermittedNext door