W12 postcode district

Postcodes and sectors

820 of the district's 1,741 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 51.50837, -0.23959, which locates the district, not a building.

Companies registered in W12

Companies House lists 5,100 companies with a registered office in W12; 1,534 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 W12

• Greater London
• London
• Hammersmith and Fulham
• Ealing
• Hammersmith
• Acton
• Kensington

Roads filed under W12

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.

• Abdale Road
• Adelaide Grove
• Aldbourne Road
• Aldine Place
• Aldine Street
• Arminger Road
• Artillery Lane
• Ashchurch Grove
• Ashchurch Park Villas
• Ashchurch Terrace
• Ashfield Road
• Askew Crescent
• Askew Road
• Askham Road
• Aubury Place
• Augustus Close
• Australia Road
• Aycliffe Road
• Aylmer Road
• Balmoral Mews
• Bamborough Gardens
• Banstead Court
• Bassein Park Road
• Batman Close
• Batson Street
• Becklow Mews
• Becklow Road
• Begonia Walk
• Bennelong Close
• Bentworth Road
• Binden Road
• Bloemfontein Avenue
• Bloemfontein Road
• Bloemfontein Way
• Boscombe Road
• Brading Terrace
• Bramble Gardens
• Braybrook Street
• Bryony Road
• Bulwer Street
• Cactus Walk
• Canada Way
• Cathnor Road
• Caverswall Street
• Caxton Road
• Clematis Street
• Clifton Avenue
• Cobbold Mews
• Cobbold Road
• Collingbourne Road
• Commonwealth Avenue
• Coningham Mews
• Coningham Road
• Cosmur Close
• Coverdale Road
• Creighton Close
• Curwen Road
• Daffodil Street
• Davisville Road
• Devonport Road

Check an address in W12

Check an address in W12

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=W12" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about W12

What does a W12 postcode tell you?

That the address lies in the W12 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 820 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 W12

• W111.7 km
• W61.9 km
• W32.0 km
• W102.3 km
• W142.5 km
• W42.6 km
• W83.2 km
• SW133.6 km
• NW103.7 km
• W93.7 km
• SW53.8 km
• W23.8 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids