TW1 postcode district

Postcodes and sectors

665 of the district's 1,506 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 51.45101, -0.32536, which locates the district, not a building.

Companies registered in TW1

Companies House lists 2,811 companies with a registered office in TW1; 384 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 TW1

• Greater London
• London
• Richmond upon Thames
• Twickenham
• Isleworth
• Hounslow
• Teddington

Roads filed under TW1

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.

• Abbottsmede Close
• Ailsa Avenue
• Ailsa Road
• Albert Road
• Alexandra Road
• Amyand Cottages
• Amyand Lane
• Amyand Park Gardens
• Amyand Park Road
• Apple Grove
• Arlington Close
• Arlington Road
• Arosa Road
• Arragon Road
• Austin Close
• Baronsfield Road
• Baylis Mews
• Beaconsfield Road
• Beauchamp Road
• Beaufort Road
• Beaulieu Close
• Bell Lane
• Beresford Avenue
• Blyth Close
• Bonser Road
• Bradshaw Close
• Brewery Lane
• Bridge Road
• Bridle Lane
• Broadway Avenue
• Brook Road
• Budds Alley
• Burnside Close
• Butterfield Close
• Cambridge Park
• Cambridge Road
• Candler Mews
• Cassilis Road
• Chalmers Way
• Chapel Road
• Cheltenham Avenue
• Chillingworth Gardens
• Cholmondeley Walk
• Church Lane
• Church Street
• Claremont Road
• Clavering Close
• Clevedon Road
• Clifden Road
• Clive Road
• Cole Park Gardens
• Cole Park Road
• Cole Road
• Copthall Gardens
• Cornwall Road
• Cresswell Road
• Cross Deep
• Cross Deep Gardens
• Crown Road
• Cumberland Close

Check an address in TW1

Check an address in TW1

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=TW1" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about TW1

What does a TW1 postcode tell you?

That the address lies in the TW1 district of the TW (Twickenham) postcode area, and the place OS Open Names most often lists first for its postcodes is Twickenham. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 665 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 TW1

• TW101.6 km
• TW22.1 km
• TW72.5 km
• TW112.8 km
• TW93.1 km
• TW33.3 km
• TW84.3 km
• KT24.3 km
• SW144.3 km
• TW124.4 km
• TW44.6 km
• KT15.2 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids