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Permitted26/02371/LBCSubmitted 5 months agoRear extension

17 Belgrave Square Westminster SW1X 8PG

Reconfiguration and alteration of the area between the main building and the Mews, including the erection of a pergola structure, alterations to the rear annex openings, updated rear garden layout and internal reconfiguration at lower ground level including revised partitions and a new utility room. (Amendments to listed building consents dated 13 December 2019 RN:18/01325/LBC and 09 May 2024 RN: 24/01324/LBC and 30 May 2025 RN: 25/02106/LBC for 'Demolition of annexe building and replacement with rear extensions to 17 Belgrave Square; excavations to create pool hall extension under garden of 17 Belgrave Square and basement beneath mews property; and associated internal alterations).

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Progress

Submitted
10 Apr 2026
— completed
Validated
10 Apr 2026
— completed
Consultation
30 May 2026
— completed
Target date
5 Jun 2026
— completed
Decided
15 Jun 2026
— completed

Application details

Reference
26/02371/LBC
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
Comments close
30 May 2026
Target decision
5 Jun 2026
Decided
15 Jun 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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