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Permitted09/09145/FULLRear extension

66 Great Cumberland Place Westminster W1H 7TU

Use of entire building as residential (Class C3). Creation of 3 x 1 bedroom flats, 1 x 2 bedroom flat and 1 x 3 bedroom flat. Demolition of second floor closet wing, partial demolition of rear extension and erection of a part single storey rear extension at first floor level and 3-storey rear link extension at ground floor level. (Land use swap with Marble Arch House, Edgware Road, 62-64 Seymour Street, 3-9 Seymour Place, 12 - 13 Hampden Gurney Street and 60 Gloucester Place). (REVISED DESCRIPTION)

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Progress

Submitted
—
— completed
Validated
—
— completed
Consultation
—
— completed
Target date
—
— completed
Decided
8 Apr 2010
— completed

Application details

Reference
09/09145/FULL
Local authority
Westminster
Postcode
W1H 7TU
Ward
BRYANSTON AND DORSET SQUARE
Application type
All Other
Property type
Flat

Key dates

Decided
8 Apr 2010

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 £820,000 — the median of the last 7 market sales in W1H (the wider postcode district), £500,000 to £2,367,000.

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