111-117 Marylebone High Street 12-14 St Vincent Street Westminster W1U 4RZ
Erection of a single storey mansard roof extension above No's 2 and 4 Blandford Street and the corner building of 111 Marylebone High Street, second floor infill extension on St Vincent Street and the rear extensions at second and third floor levels projecting into the internal courtyard. Installation of balconies on the rear elevations, alterations to fenestration and creation of a shared external amenity space within the courtyard area at first floor level and installation of new plan and associated works, all in conjunction with works to combine and to combine two residential blocks to enable the reconfiguration of 24 existing units and to provide an additional 7 residential units (site includes 111-117 Marylebone High Street, 14 St Vincent Street and 2-8 Blandford Street).
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Progress
Application details
- Reference
- 16/03666/FULL
- Local authority
- Westminster
- Postcode
- W1U 4RZ
- Ward
- MARYLEBONE HIGH STREET
- Application type
- All Other
- Property type
- House
Key dates
- Decided
- 13 Sept 2016
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
Nothing on this postcode has changed hands in the last two years. The sales below are for pricing rather than a lead.
- 111 MARYLEBONE HIGH STREET, LONDON, W1U 4RZOther · Leasehold · Not a standard market sale · £800,00010 years ago22 Jul 2016
Contains HM Land Registry data © Crown copyright and database right 2016. 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
- 111-117 Marylebone High Street 12-14 St Vincent Street Westminster W1U 4RZPermittedNext door
- 4A BLANDFORD STREET Westminster W1U 4AUPermittedNext door
- DEVELOPMENT SITE AT, 4 BLANDFORD STREET MARYLEBONE HIGH STREET (113-117) Westminster W1U 4SAPermittedNext door
- 111, 117 Marylebone High Street Westminster W1U 4RZPermittedNext door
- 111, 117 Marylebone High Street Westminster W1U 4RZPermittedNext door
- 111, 117 Marylebone High Street Westminster W1U 4RZPermittedNext door