SW1W postcode district

Postcodes and sectors

343 of the district's 815 postcodes are live in the ONS Postcode Directory of August 2026. A postcode directory says whether a code is in use, never who is there. The live postcodes centre on 51.49267, -0.15110, which locates the district, not a building.

Companies registered in SW1W

Companies House lists 2,885 companies with a registered office in SW1W; 1,688 of them at addresses shared by 25 or more companies (1 October 2026 snapshot). 25 is the count at which the address lookup reports a company cluster.

Places OS Open Names lists for SW1W

• Greater London
• London
• City of Westminster
• Chelsea
• Kensington and Chelsea
• Wandsworth

Roads filed under SW1W

Named roads first, then numbered ones. A road is filed under one district even where it runs through several, so a street missing here may be listed under a neighbouring district — which is why the address lookup never calls a British street absent. Great Britain has no open register of buildings, so a listed road never means a building on it exists.

• Alba Square
• Avery Farm Row
• Beeston Place
• Bloomfield Terrace
• Boscobel Place
• Bourne Street
• Buckingham Palace Road
• Bulleid Way
• Bunhouse Place
• Burton Mews
• Caroline Terrace
• Chelsea Bridge Road
• Chester Row
• Chester Square
• Chester Square Mews
• Cliveden Place
• Colonnade Walk
• Cundy Street
• Dove Place
• Eaton Close
• Eaton Gate
• Eaton Lane
• Eaton Mews South
• Eaton Mews West
• Eaton Row
• Eaton Square
• Eaton Terrace
• Eaton Terrace Mews
• Ebury Bridge Road
• Ebury Mews
• Ebury Mews East
• Ebury Square
• Ebury Street
• Eccleston Place
• Eccleston Street
• Elizabeth Street
• Five Fields Square
• Garrison Square
• Gatliff Road
• Gerald Mews
• Gerald Road
• Graham Terrace
• Grenadier Gardens
• Grosvenor Cottages
• Grosvenor Gardens
• Grosvenor Gardens Mews East
• Grosvenor Gardens Mews North
• Grosvenor Gardens Mews South
• Grosvenor Road
• Hobart Place
• Holbein Mews
• Holbein Place
• Lower Belgrave Street
• Lower Grosvenor Place
• Lower Sloane Street
• Lygon Place
• Minera Mews
• Mulberry Square
• Ormonde Place
• Passmore Street

Check an address in SW1W

Check an address in SW1W

The same road list through the API, from the outward code alone:

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=SW1W" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about SW1W

What does an SW1W postcode tell you?

That the address lies in the SW1W district of the SW (South West London) postcode area, and the place OS Open Names most often lists first for its postcodes is City of Westminster. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 343 live postcodes.

Where the counts come from

• ons-postcode-directory · version 2026-08 · Contains ONS, OS and Royal Mail data © Crown copyright and database right 2026, Open Government Licence v3.0. Northern Ireland postcodes are excluded: their reuse needs a Land & Property Services licence.
• os-open-names · version 2026-11-01 · Contains OS data © Crown copyright and database right 2026, Open Government Licence v3.0.
• uk-companies-house · version 2026-10-01 · Companies House free company data product, Open Government Licence v3.0

What each figure means, and what a district page never says, is set out in Reading a British postcode district page; the glossary defines a postcode district, a postcode area, a postcode directory and a street register.

Data synced on 2026-11-01: the newest version among the datasets listed above.

Districts nearest SW1W

• SW1X0.7 km
• SW1V0.8 km
• SW1E1.0 km
• SW31.1 km
• SW1P1.3 km
• SW1H1.4 km
• W1J1.7 km
• SW71.8 km
• SW1A1.9 km
• SW1Y2.0 km
• W1K2.1 km
• W1S2.1 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids