KT21 postcode district

Postcodes and sectors

377 of the district's 559 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 51.31122, -0.30359, which locates the district, not a building.

Companies registered in KT21

Companies House lists 880 companies with a registered office in KT21; 101 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 KT21

• Mole Valley
• Surrey
• South East
• Ashtead

Roads filed under KT21

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.

• Agates Lane
• Albert Road
• Alexander Godley Close
• Apple Court
• April Close
• Ashfield Close
• Ashtead Gap
• Ashtead Woods Road
• Astede Place
• Aston Close
• Bagot Close
• Balquhain Close
• Barnby Close
• Barnett Wood Lane
• Beechcroft
• Berry Meade
• Berry Meade Close
• Berry Walk
• Blacksmith Close
• Bourne Grove
• Bowyers Close
• Bramley Grove
• Bramley Way
• Broadhurst
• Broadmead
• Brookers Close
• Brookfield Close
• Burnside
• Bushy Shaw
• Caen Wood Road
• Chaffers Mead
• Chalk Lane
• Chantrey Close
• Charlotte Close
• Cherry Orchard
• Chestnut Place
• Church Road
• Clarendon Mews
• Corfe Close
• Craddock's Close
• Craddocks Avenue
• Crampshaw Lane
• Cray Avenue
• Crispin Close
• Crofton
• Crompton Close
• Culverhay
• Darcy Place
• Darcy Road
• Dene Road
• Devitt Close
• Druid's Close
• Elliston Way
• Elmwood Close
• Elmwood Court
• Epsom Road
• Fairholme Crescent
• Farm Lane
• Floral Court
• Forest Crescent

Check an address in KT21

Check an address in KT21

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=KT21" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about KT21

What does a KT21 postcode tell you?

That the address lies in the KT21 district of the KT (Kingston upon Thames) postcode area, and the place OS Open Names most often lists first for its postcodes is Ashtead. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 377 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 KT21

• KT222.7 km
• KT182.8 km
• KT175.0 km
• KT195.1 km
• KT205.8 km
• KT95.8 km
• KT236.1 km
• KT117.1 km
• SM77.2 km
• KT107.4 km
• KT68.5 km
• SM28.6 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids