W4 postcode district

Postcodes and sectors

1,024 of the district's 2,079 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 51.49117, -0.26413, which locates the district, not a building.

Companies registered in W4

Companies House lists 6,854 companies with a registered office in W4; 2,446 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 W4

• London
• Greater London
• Hounslow
• Chiswick
• Ealing
• Acton
• Brentford
• Hammersmith
• Hammersmith and Fulham

Roads filed under W4

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.

• Abinger Road
• Acton Lane
• Addison Grove
• Airedale Avenue
• Airedale Avenue South
• Alexandra Gardens
• Alexandra Road
• Alfred Close
• Alkerden Road
• Alwyn Avenue
• Annandale Road
• Anstice Close
• Antrobus Road
• Arlington Gardens
• Arnott Close
• Ashbourne Grove
• Bailey Mews
• Balfern Grove
• Barley Mow Passage
• Barrowgate Road
• Bath Road
• Bayham Road
• Beaconsfield Close
• Beaconsfield Road
• Beauchamp Close
• Beaulieu Place
• Beaumont Road
• Bedford Close
• Bedford Corner
• Bedford Road
• Belmont Grove
• Belmont Road
• Belmont Terrace
• Bennett Street
• Berrymede Road
• Beverley Road
• Binns Road
• Bishops Close
• Blandford Road
• Bleak House Lane
• Blenheim Road
• Bollo Lane
• Bolton Road
• Bond Street
• Bonheur Road
• Boston Gardens
• Bourne Place
• Brackley Road
• Brackley Terrace
• Bridge Street
• Bridgman Road
• British Grove
• British Grove Passage
• British Grove South
• Brookfield Road
• Brooks Lane
• Brooks Road
• Burlington Gardens
• Burlington Lane
• Burlington Road

Check an address in W4

Check an address in W4

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=W4" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about W4

What does a W4 postcode tell you?

That the address lies in the W4 district of the W (West London) postcode area, and the place OS Open Names most often lists first for its postcodes is London. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 1,024 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 W4

• SW132.2 km
• W32.2 km
• W62.5 km
• W122.6 km
• TW82.9 km
• SW142.9 km
• TW93.1 km
• W53.6 km
• W143.8 km
• W114.1 km
• SW154.5 km
• W134.6 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids