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Permitted23/06596/FULLSubmitted 2 years agoBasement

57 Harley Street Westminster W1G 8QS

Erection of a basement extension to provide additional medical (Class E(e)) floorspace.

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Progress

Submitted
18 Oct 2023
— completed
Validated
18 Oct 2023
— completed
Consultation
16 Nov 2023
— completed
Target date
13 Dec 2023
— completed
Decided
27 Nov 2023
— completed

Application details

Reference
23/06596/FULL
Local authority
Westminster
Postcode
W1G 8QS
Ward
MBW_22
Application type
All Other
Property type
House

Key dates

Submitted
18 Oct 2023
Validated
18 Oct 2023
Comments close
16 Nov 2023
Target decision
13 Dec 2023
Decided
27 Nov 2023

Estimated project value

£265k–£395k

Based on the 48.7m² of floor area stated in the application, at inner London rates (2026). Source: trade estimate, basement £4,000-£6,000/m².

Floor area gained: 48.7

Recently sold nearby

New owners, recently moved in. First work on a house usually follows within months of completing. 8 recent sales are listed below.

Homes here go for about £1,000,000 — the median of the last 5 market sales in W1G (the wider postcode district), £700,000 to £2,140,750.

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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