Areas / Westminster / SW1W
Architects in SW1W
The southern part of Belgravia and north Pimlico around Victoria. Listed stucco terraces and mansion flats in conservation areas.
RIBA Chartered Practice · ARB-registered architects · Extensions, lofts and planning drawings

Planning authority
Which council decides in SW1W?
SW1W is split between 2 councils, so the council that decides your application depends on your street. 343 postcodes, 5.3 miles from our studio.
| Council | Share of SW1W postcodes |
|---|---|
| Westminster | 84% (288) |
| Kensington and Chelsea | 15% (53) |
By postcode sector
| Sector | Postcodes | Council |
|---|---|---|
| SW1W 0 | 57 | Westminster |
| SW1W 8 | 176 | Westminster (mostly; some streets in another council) |
| SW1W 9 | 110 | Westminster |
Postcode checker
Check your exact postcode
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
If your home is in Westminster
There are 56 conservation areas in Westminster.
SourceThe 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.
SourceThe 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.
Source
Local planning points
If your home is in Kensington and Chelsea
The borough has 38 conservation areas, which together cover nearly three quarters of it.
SourceThe council adopted its Local Plan 2024 on 24 July 2024.
SourceBasements 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).
Source
Services
What we draw in SW1W
- House extensions
- Loft conversions
- Basement conversions
- Planning permission
- Building regulations drawings
- Structural calculations
- Flat conversions
- Change of use
- New builds
- Interior design
Nearby postcode districts: SW1X, SW1V, SW3, SW1P, SW7, SW10.