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Permitted25/04826/FULLSubmitted over a year agoLoft conversion

5, 7 Mandeville Place City Of Westminster W1U 3AY

Partial demolition and replacement of rear façade and closet wing, provision of new fenestration, creation of mansard extension to Duke’s Mews, alterations to fenestration and detailing to front and rear façade, alterations to existing stair core, creation of rooflights and removal and reconfiguration of roof level plant

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Progress

Submitted
14 Jul 2025
— completed
Validated
14 Jul 2025
— completed
Consultation
28 Nov 2025
— completed
Target date
8 Sept 2025
— completed
Decided
21 Oct 2025
— completed

Application details

Reference
25/04826/FULL
Local authority
Westminster
Postcode
W1U 3AY
Ward
MBW_22
Application type
All Other
Property type
House

Key dates

Submitted
14 Jul 2025
Validated
14 Jul 2025
Comments close
28 Nov 2025
Target decision
8 Sept 2025
Decided
21 Oct 2025

Estimated project value

£4040k–£8415k

Based on the 2,493m² 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: 2,492.7m²

Recently sold nearby

Inside the two years most owners do their major work — kitchens, bathrooms, rewires and lofts.

Contains HM Land Registry data © Crown copyright and database right 2024. 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.

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