SW3 postcode district

Postcodes and sectors

868 of the district's 1,853 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 51.48936, -0.16588, which locates the district, not a building.

Companies registered in SW3

Companies House lists 3,455 companies with a registered office in SW3; 848 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 SW3

• London
• Greater London
• Kensington and Chelsea
• Chelsea
• Clapham
• Lambeth
• Kensington
• City of Westminster

Roads filed under SW3

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.

• Albert Bridge Road
• Alexander Square
• Alpha Place
• Anderson Street
• Astell Street
• Basil Street
• Battersea Bridge Road
• Beauchamp Place
• Beaufort Gardens
• Beaufort Street
• Blacklands Terrace
• Bramerton Street
• Bray Place
• Britten Street
• Brompton Place
• Brompton Road
• Brompton Square
• Bull's Gardens
• Burnsall Street
• Bury Walk
• Bywater Street
• Cadogan Gardens
• Cadogan Street
• Cale Street
• Callow Street
• Carlyle Square
• Carriage Drive North
• Caversham Street
• Chelsea Embankment
• Chelsea Manor Gardens
• Chelsea Manor Street
• Chelsea Park Gardens
• Chelsea Square
• Cheltenham Terrace
• Cheyne Gardens
• Cheyne Mews
• Cheyne Row
• Cheyne Walk
• Christchurch Street
• Christchurch Terrace
• Clover Mews
• Cottage Place
• Coulson Street
• Crescent Place
• Culford Gardens
• Danube Street
• Danvers Street
• Denyer Street
• Dilke Street
• Donne Place
• Dovehouse Street
• Draycott Avenue
• Draycott Place
• Draycott Terrace
• Dudmaston Mews
• Duke of York Square
• Durham Place
• East Road
• Egerton Crescent
• Egerton Gardens

Check an address in SW3

Check an address in SW3

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=SW3" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about SW3

What does an SW3 postcode tell you?

That the address lies in the SW3 district of the SW (South West London) postcode area, and the place OS Open Names most often lists first for its postcodes is Chelsea. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 868 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 SW3

• SW1W1.1 km
• SW71.1 km
• SW1X1.2 km
• SW101.3 km
• SW1V1.8 km
• SW51.8 km
• SW1E2.0 km
• SW1P2.3 km
• SW112.3 km
• W82.4 km
• SW1H2.5 km
• W1J2.5 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids