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Permitted25/00826/FULLSubmitted over a year agoLoft conversion

69 Chiltern Street Westminster W1U 6NL

Erection of a mansard roof extension and extension of existing rear closet wing at second and third floors; installation of decking at the ground floor rear courtyard; installation of new windows to front, rear and side elevations, and associated works, all to alter and enlarge dwelling (Class C3).

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Progress

Submitted
24 Feb 2025
— completed
Validated
24 Feb 2025
— completed
Consultation
28 Mar 2025
— completed
Target date
21 Apr 2025
— completed
Decided
10 Apr 2025
— completed

Application details

Reference
25/00826/FULL
Local authority
Westminster
Postcode
W1U 6NL
Ward
MBW_22
Application type
All Other
Property type
House

Key dates

Submitted
24 Feb 2025
Validated
24 Feb 2025
Comments close
28 Mar 2025
Target decision
21 Apr 2025
Decided
10 Apr 2025

Estimated project value

£63k–£130k

Based on the 39.0m² 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: 39m² · 1 additional bedrooms

Recently sold nearby

New owners, recently moved in. First work on a house usually follows within months of completing.

Contains HM Land Registry data © Crown copyright and database right 2026. 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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