HP20 postcode district

Postcodes and sectors

530 of the district's 1,025 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 51.82025, -0.80652, which locates the district, not a building.

Companies registered in HP20

Companies House lists 1,544 companies with a registered office in HP20; 266 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 HP20

• Aylesbury
• Buckinghamshire
• South East

Roads filed under HP20

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.

• Abbotts Close
• Abbotts Road
• Aiston Place
• Albert Street
• Albion Street
• Alexander Road
• Anchor Lane
• Archer Drive
• Arundel Green
• Ascott Court
• Ascott Road
• Ash Close
• Ashley Row
• Aspen Close
• Aylesbury Road
• Bakers Mews
• Balfour Way
• Bardon Green
• Barnsbury Avenue
• Base Close
• Batchelor Close
• Bates Court
• Bellingham Way
• Bierton Road
• Bourbon Street
• Bramcote Close
• Britannia Street
• Britannia Walk
• Broughton Avenue
• Broughton Lane
• Bryanston Avenue
• Buckingham Street
• Buckle Close
• Burdett Close
• Cambridge Close
• Cambridge Place
• Campion Close
• Cannock Road
• Cannon Close
• Cantley Close
• Castle Street
• Cedar Close
• Chadbone Close
• Cheney Walk
• Cheney Way
• Church Street
• Clarke Court
• Clarke Walk
• Cleveland Park
• Cleveland Road
• Cock Lane
• Como Road
• Coniston Green
• Connaught Road
• Cooper's Yard
• Coppice Close
• Coppice Way
• Cotswold Green
• Cousins Drive
• Coy Court

Check an address in HP20

Check an address in HP20

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=HP20" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about HP20

What does an HP20 postcode tell you?

That the address lies in the HP20 district of the HP (Hemel Hempstead) postcode area, and the place OS Open Names most often lists first for its postcodes is Aylesbury. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 530 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 HP20

• HP191.5 km
• HP211.7 km
• HP222.8 km
• HP177.5 km
• HP2310.3 km
• HP1811.1 km
• HP2711.2 km
• LU713.9 km
• HP1614.4 km
• OX3915.2 km
• OX915.3 km
• HP417.3 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids