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Refused26/02370/NMASubmitted 5 months agoRear extension

17 Belgrave Square Westminster SW1X 8PG

Amendments to planning permission dated 13th December 2019 (RN: 18/01324/FULL) for Demolition of annexe building and replacement with rear extensions to 17 Belgrave Square and excavations to create pool hall extension under garden of 17 Belgrave Square and basement beneath mews property; all in connection with the use of the mews property and 17 Belgrave Square as two single family dwelling houses. NAMELY, to allow proposed reconfiguration of the area between the Main House and the Mews, including the omission of the rear garden conservatory, erection of a pergola structure, alterations to the rear annex openings, and updated rear garden layout.

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Progress

Submitted
10 Apr 2026
— completed
Validated
10 Apr 2026
— completed
Consultation
— completed
Target date
8 May 2026
— completed
Decided
7 May 2026
— completed

Application details

Reference
26/02370/NMA
Local authority
Westminster
Postcode
SW1X 8PG
Ward
KBW_22
Application type
All Other
Property type
House

Key dates

Submitted
10 Apr 2026
Validated
10 Apr 2026
Target decision
8 May 2026
Decided
7 May 2026

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

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

Contains HM Land Registry data © Crown copyright and database right 2024. 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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