W9 postcode district

Postcodes and sectors

578 of the district's 1,278 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 51.52491, -0.19262, which locates the district, not a building.

Companies registered in W9

Companies House lists 3,284 companies with a registered office in W9; 273 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 W9

• Greater London
• London
• City of Westminster
• Paddington
• Kensington
• Kensington and Chelsea
• Hampstead
• Camden
• Brent

Roads filed under W9

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 Mews
• Admiral Walk
• Aldsworth Close
• Amberley Road
• Ashmore Road
• Ashworth Road
• Barnsdale Road
• Barnwood Close
• Biddulph Road
• Blomfield Road
• Braden Street
• Bradiston Road
• Bravington Place
• Bravington Road
• Bristol Gardens
• Browning Close
• Burlington Close
• Byron Mews
• Castellain Road
• Chantry Close
• Chippenham Mews
• Chippenham Road
• Claremont Road
• Clarendon Gardens
• Clarendon Terrace
• Clearwell Drive
• Clifton Gardens
• Clifton Road
• Clifton Villas
• Coomassie Road
• Coryton Path
• Cropthorne Court
• Croxley Road
• Delaware Road
• Denholme Road
• Downfield Close
• Drayford Close
• Edbrooke Road
• Elgin Avenue
• Elgin Mews North
• Elgin Mews South
• Elizabeth Close
• Elkstone Road
• Elmfield Way
• Elnathan Mews
• Errington Road
• Essendine Road
• Fermoy Road
• Fernhead Road
• Fernleigh Close
• Fleming Close
• Fordingley Road
• Formosa Street
• Foscote Mews
• Goldney Road
• Grantully Road
• Greville Place
• Grittleton Road
• Harrow Road
• Hermes Close

Check an address in W9

Check an address in W9

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=W9" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about W9

What does a W9 postcode tell you?

That the address lies in the W9 district of the W (West London) postcode area, and the place OS Open Names most often lists first for its postcodes is City of Westminster. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 578 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 W9

• W21.2 km
• NW81.5 km
• W101.7 km
• NW61.9 km
• W112.1 km
• W1H2.3 km
• W82.6 km
• W1U2.8 km
• W1G3.1 km
• W1C3.2 km
• W1K3.3 km
• NW33.4 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids