UB4 postcode district

Postcodes and sectors

704 of the district's 977 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 51.52599, -0.40855, which locates the district, not a building.

Companies registered in UB4

Companies House lists 4,623 companies with a registered office in UB4; 838 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 UB4

• Hillingdon
• Greater London
• London
• Hayes

Roads filed under UB4

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.

• Acer Avenue
• Adelphi Crescent
• Adelphi Way
• Airdrie Close
• Alba Close
• Arden Close
• Ashford Avenue
• Attlee Close
• Attlee Road
• Avon Close
• Ayles Road
• Balmoral Drive
• Barnard Gardens
• Barnhill Lane
• Barnhill Road
• Beaconsfield Road
• Bedford Avenue
• Belmore Avenue
• Berrydale Road
• Berwick Avenue
• Bevin Road
• Binstead Close
• Bittern Close
• Blacklands Drive
• Blackpool Gardens
• Blake Close
• Blandford Waye
• Blisworth Close
• Bondfield Avenue
• Bradenham Road
• Braunston Drive
• Brentford Close
• Brookside Road
• Bullsbrook Road
• Burndell Way
• Burns Close
• Burpham Close
• Bury Avenue
• Byron Way
• Cambus Close
• Camden Avenue
• Caprea Close
• Carlyon Road
• Catkin Place
• Cavendish Close
• Cerne Close
• Charville Lane
• Chatsworth Road
• Chaucer Avenue
• Cheddar Waye
• Chesil Way
• Chirk Close
• Church Close
• Clayton Terrace
• Coleridge Way
• Constable Close
• Corfe Close
• Cornelia Drive
• Cosgrove Close
• Coulter Close

Check an address in UB4

Check an address in UB4

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=UB4" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about UB4

What does a UB4 postcode tell you?

That the address lies in the UB4 district of the UB (Southall) postcode area, and the place OS Open Names most often lists first for its postcodes is Hayes. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 704 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 UB4

• UB32.6 km
• UB12.7 km
• UB52.9 km
• UB113.1 km
• UB23.6 km
• UB104.0 km
• UB84.6 km
• UB74.8 km
• HA44.9 km
• UB64.9 km
• TW55.1 km
• W75.3 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids