27, 29 Glasshouse Street Westminster W1B 5DF
Amendment of planning permission dated 30th July 2024 (RN 24/02160/FULL) for the Comprehensive refurbishment of the buildings, in connection with use of all of the upper floors as office accommodation (Use Class E), erection of a setback rooftop extension, and a double mansard extension with new dormer windows to the Glasshouse Street elevation including new amenity terraces; alterations to Glasshouse Street chimneys and new plant equipment and screening; external alterations to Glasshouse Street facades including new retail shopfront, new office reception entrance and glazing, new service entrance and associated works; internal alterations including enlargement of the office reception at ground floor, infilling the atrium to provide additional office accommodation (Use Class E) at first floor, and the relocation of the goods corridor on the ground floor; and other associated works. NAMELY, integration of Glasshouse Street dry riser inlet into the glazing system; Minor amendment to location of office plate notional stairs and ramps; Omission of external wall lining; Minor amendment to Atrium Rooflight glass panel sizes; and omission of Level 7 rooflight.
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Progress
Application details
- Reference
- 25/08970/NMA
- Local authority
- Westminster
- Postcode
- W1B 5DF
- Ward
- WEW_22
- Application type
- All Other
- Property type
- Commercial
Key dates
- Submitted
- 10 Dec 2025
- Validated
- 10 Dec 2025
- Target decision
- 7 Jan 2026
- Decided
- 5 Mar 2026
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.
- FOURTH FLOOR, VENTURE HOUSE 27-29 GLASSHOUSE STREET, LONDON, W1B 5DFOther · Leasehold · Not a standard market sale · £40,0009 years ago13 Jan 2017
Contains HM Land Registry data © Crown copyright and database right 2017. 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
- 27, 29 Glasshouse Street Westminster W1B 5DFPermittedNext door
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- 27, 29 Glasshouse Street Westminster W1B 5DFPendingNext door
- 27, 29 Glasshouse Street Westminster W1B 5DFPermittedNext door