Architects in SW1X

Belgravia and Knightsbridge. Listed stucco terraces, squares and mews, almost entirely in conservation areas.

RIBA Chartered Practice · ARB-registered architects · Extensions, lofts and planning drawings

Planning authority

Which council decides in SW1X?

SW1X is split between 2 councils, so the council that decides your application depends on your street. 403 postcodes, 4.9 miles from our studio.

Council	Share of SW1X postcodes
Westminster	52% (210)
Kensington and Chelsea	47% (191)

Sector	Postcodes	Council
SW1X 0	78	Kensington and Chelsea
SW1X 7	87	Westminster (mostly; some streets in another council)
SW1X 8	125	Westminster (mostly; some streets in another council)
SW1X 9	113	Kensington and Chelsea (mostly; some streets in another council)

Postcode checker

Type any postcode in the 33 London boroughs we cover. We'll tell you which council handles planning there and show you the local planning points.

Local planning points

There are 56 conservation areas in Westminster.
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The City Plan 2019-2040 (2026) was adopted on 21 January 2026 after a partial review, replacing the 2021 version; work on a full new City Plan began in 2026.
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The 2026 City Plan brings in a retrofit-first approach before demolition, and for the first time developments of fewer than 10 homes must contribute to affordable housing.
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Local planning points

The borough has 38 conservation areas, which together cover nearly three quarters of it.
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The council adopted its Local Plan 2024 on 24 July 2024.
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Basements are limited to one storey and no more than 50% of the garden, must not involve digging under a listed building, and need at least 1m of soil above them under gardens (Local Plan 2024 policy CD11).
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Services

Nearby postcode districts: SW1W, SW3, SW7, SW1V, SW1P, SW10.