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Permitted09/04162/FULLBasement

40 Lower Belgrave Street Westminster SW1W 0LN

Alterations including the installation of external stair at rear basement and ground floor level; creation of two balconies at rear ground floor level; installation of window and French doors and installation of railings in connection with new roof terrace at rear first floor level; infill of lightwell at ground and first floor levels; replacement of roof covering and installation of rooflight at rear second floor level. In connection with the use of the building as two self-contained flats (1x2 bed and 1x3 bed).

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Progress

Submitted
—
— completed
Validated
—
— completed
Consultation
—
— completed
Target date
—
— completed
Decided
12 Aug 2009
— completed

Application details

Reference
09/04162/FULL
Local authority
Westminster
Postcode
SW1W 0LN
Ward
KNIGHTSBRIDGE AND BELGRAVIA
Application type
All Other
Property type
Flat

Key dates

Decided
12 Aug 2009

Estimated project value

£135k–£340k

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: trade estimate.

Recently sold nearby

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

Homes here go for about £3,905,025 — the median of the last 8 market sales in SW1W 0LN, £2,850,000 to £6,830,000.

Contains HM Land Registry data © Crown copyright and database right 2025. 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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