Westminster
Erection of two 2 storey infill extensions to the set-back corners at fifth floor level on the Berkeley Street/Mayfair Place elevation and Berkeley Street/Stratton Street elevation, the demolition of the existing mansard roof and its replacement with a single sheer storey (to match the lower floors) on the Mayfair Place elevation and Stratton Street elevation, erection of an additional set back floor at eighth floor level, plus roof top plant room. Associated external alterations, including to existing ground floor entrances, and alterations to the existing plant/ducts. Use of basement (part), ground (part) and 1st to 8th floor as offices (Class E).
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Progress
Application details
- Reference
- 20/06093/FULL
- Local authority
- Westminster
- Ward
- WEC_02
- Application type
- All Other
- Property type
- Commercial
Key dates
- Submitted
- 2 Oct 2020
- Validated
- 2 Oct 2020
- Comments close
- 2 Nov 2020
- Target decision
- 1 Jan 2021
- Decided
- 1 Dec 2021
Estimated project value
£28k–£75k
Typical UK cost for this job type, at UK average rates (2026). Estimated from the proposal description — planning applications do not state build cost. Source: Checkatrade 2026 loft conversion cost guide.
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.
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