UB9 postcode district

Postcodes and sectors

431 of the district's 621 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 51.58645, -0.49233, which locates the district, not a building.

Companies registered in UB9

Companies House lists 1,810 companies with a registered office in UB9; 103 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 UB9

• Buckinghamshire
• South East
• London
• Hillingdon
• Greater London
• Harefield
• Denham
• New Denham
• South Harefield
• Higher Denham
• Hill End
• Baker's Wood
• Tatling End
• Rush Green
• Three Rivers
• Hertfordshire
• Eastern
• Newyears Green

Roads filed under UB9

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.

• Adrian Close
• Albert Broccoli Road
• Alder Road
• Amersham Road
• Anderson Close
• Ash Close
• Ashcroft Drive
• Ash Green
• Ash Grove
• Ash Mead Drive
• Ashmead Lane
• Baconsmead
• Bakers Wood
• Bankside Close
• Barden Close
• Barrington Drive
• Belfry Avenue
• Bird Lane
• Blacksmith's Lane
• Bowyer Crescent
• Breakspear Path
• Breakspear Road North
• Breakspear Road South
• Broadwater Gardens
• Broadwater Lane
• Broadway East
• Broken Gate Lane
• Bronsdon Way
• Burbery Close
• Campion Close
• Canal Way
• Celia Johnson Close
• Chapel Row
• Cheapside Lane
• Childs Avenue
• Church Hill
• Church Road
• Colne Place
• Coppermill Lane
• Cornflower Place
• Countess Close
• Courtfield Gardens
• Dairy Farm Lane
• Dellside
• Denham Avenue
• Denham Close
• Denham Court Drive
• Denham Green Close
• Denham Green Lane
• Denham Way
• Dexter Road
• Doggetts Farm Road
• Dovecote Mews
• Dovedale Close
• Dunster Close
• Edinburgh Gate
• Fallowfield Close
• Field Road
• Ford End
• Froggy Lane

Check an address in UB9

Check an address in UB9

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=UB9" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about UB9

What does a UB9 postcode tell you?

That the address lies in the UB9 district of the UB (Southall) postcode area, and the place OS Open Names most often lists first for its postcodes is Harefield. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 431 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 UB9

• SL94.6 km
• UB105.0 km
• HA65.6 km
• UB85.9 km
• HA45.9 km
• WD36.7 km
• SL06.9 km
• HA57.4 km
• HP87.8 km
• WD198.6 km
• WD188.8 km
• UB48.9 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids