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Permitted14/02662/FULLRear extension

40 Curzon Street Westminster W1J 7UG

Redevelopment behind the retained front facade of the property including rear extensions and excavation at basement level, demolition of roof and upper section of the rear wall. Use of the property for residential purposes (Use Class C3) as a single residential dwelling house. Creation of a terrace at rear ground floor level and Juliette balconies at rear first and third floor levels. Installation of plant in the basement vaults and at rear second floor level, creation of a lightwell to the front of the property and alterations to the ground floor frontage. Rear basement extension and lowering of basement floor level and lowered floor to plant/store room under pavement. Underpinning of neighbouring properties.

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Progress

Submitted
— completed
Validated
— completed
Consultation
— completed
Target date
— completed
Decided
10 Jun 2014
— completed

Application details

Reference
14/02662/FULL
Local authority
Westminster
Postcode
W1J 7UG
Ward
WEST END
Application type
All Other
Property type
House

Key dates

Decided
10 Jun 2014

Estimated project value

£41k–£75k

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: MyJobQuote / Checkatrade 2026, ~20m² at £1,800-£3,000/m².

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 £3,210,000 — the median of the last 4 market sales in W1J (the wider postcode district), £632,000 to £5,488,000.

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.

Nearby applications