11 Marylebone Mews Westminster W1G 8PX
Erection of a mansard roof extension, excavation and extension of the existing basement, installation of plant within a louvered acoustic enclosure on the rear flat roof at second floor and the replacement of the fenestration to the front and rear of the building; all to enlarge and alter dwellinghouse (Class C3).
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Progress
Application details
- Reference
- 26/00802/FULL
- Local authority
- Westminster
- Postcode
- W1G 8PX
- Ward
- MBW_22
- Application type
- All Other
- Property type
- Flat
Key dates
- Submitted
- 10 Feb 2026
- Validated
- 10 Feb 2026
- Comments close
- 3 Apr 2026
- Target decision
- 7 Apr 2026
- Decided
- 2 Jul 2026
Estimated project value
£135k–£280k
Based on the 83.0m² 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: 83m² · -1 additional bedrooms
Recently sold nearby
Nothing on this postcode has changed hands in the last two years. The sales below are for pricing rather than a lead.
- 12 MARYLEBONE MEWS, LONDON, W1G 8PXTerraced · Leasehold · £4,000,0006 years ago6 Oct 2020
- 14 MARYLEBONE MEWS, LONDON, W1G 8PXFlat or maisonette · Leasehold · £635,00022 years ago16 Aug 2004
- 5 MARYLEBONE MEWS, LONDON, W1G 8PXFlat or maisonette · Leasehold · New build · £300,00026 years ago21 Mar 2000
- 12 MARYLEBONE MEWS, LONDON, W1G 8PXTerraced · Leasehold · £400,00028 years ago17 Feb 1998
- 14 MARYLEBONE MEWS, LONDON, W1G 8PXFlat or maisonette · Leasehold · £275,00028 years ago15 Dec 1997
- 14 MARYLEBONE MEWS, LONDON, W1G 8PXFlat or maisonette · Leasehold · £240,00029 years ago21 Jul 1997
- 12 MARYLEBONE MEWS, LONDON, W1G 8PXTerraced · Leasehold · £190,00029 years ago13 Jan 1997
Homes here go for about £300,000 — the median of the last 7 market sales in W1G 8PX, £190,000 to £4,000,000.
Contains HM Land Registry data © Crown copyright and database right 2020. 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
- 11 Marylebone Mews Westminster W1G 8PXRefusedNext door
- 11 Marylebone Mews Westminster W1G 8PXPendingNext door
- 12 Marylebone Mews Westminster W1G 8PXPermittedNext door
- 12 Marylebone Mews Westminster W1G 8PXPermittedNext door
- 12 Marylebone Mews Westminster W1G 8PXRefusedNext door
- 12PendingNext door