WD3 postcode district

Postcodes and sectors

1,281 of the district's 2,381 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 51.64677, -0.48239, which locates the district, not a building.

Companies registered in WD3

Companies House lists 4,672 companies with a registered office in WD3; 725 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 WD3

• Hertfordshire
• Eastern
• Three Rivers
• Rickmansworth
• Chorleywood
• Maple Cross
• Sarratt
• Buckinghamshire
• South East
• West Hyde
• Chenies
• London
• Hillingdon
• Greater London
• Chandler's Cross
• Woodcock Hill
• Chipperfield
• Moor Park
• Batchworth Heath
• Watford
• Micklefield Green

Roads filed under WD3

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.

• Aldbury Road
• Alexandra Road
• All Saints Lane
• Amersham Road
• Appleby Drive
• Armitage Close
• Arnett Close
• Arnett Way
• Ashleys
• Ash Vale
• Badgers Dell
• Badgers Walk
• Baldwins Lane
• Barn Lea
• Barton Way
• Basing Road
• Batchworth Heath
• Batchworth Hill
• Batchworth Lane
• Bateman Road
• Beacon Way
• Beauchamp Gardens
• Bedford Close
• Bedford Court
• Beechcroft Avenue
• Beechen Wood
• Beechwood Avenue
• Beechwood Park
• Belfry Lane
• Bentley Way
• Beresford Road
• Berks Hill
• Berry Close
• Berry Lane
• Berry Way
• Betjeman Gardens
• Beulah Place
• Birch Drive
• Blacketts Wood Drive
• Blackmoor Lane
• Bradbery
• Bradford Road
• Bragmans Lane
• Bridle Lane
• Briery Court
• Briery Field
• Broughton Way
• Brushwood Drive
• Bullsland Gardens
• Bullsland Lane
• Burfield Road
• Burtons Lane
• Bury Lane
• Bury Meadows
• Bury Mews
• Buttlehide
• Canterbury Way
• Capell Avenue
• Capell Road
• Capell Way

Check an address in WD3

Check an address in WD3

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=WD3" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about WD3

What does a WD3 postcode tell you?

That the address lies in the WD3 district of the WD (Watford) postcode area, and the place OS Open Names most often lists first for its postcodes is Rickmansworth. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 1,281 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 WD3

• WD184.7 km
• WD175.6 km
• HA65.7 km
• HP86.1 km
• WD246.5 km
• WD196.6 km
• UB96.7 km
• WD46.9 km
• SL97.4 km
• WD57.8 km
• WD257.9 km
• WD238.6 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids