NW3 postcode district

Postcodes and sectors

1,318 of the district's 2,784 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 51.55235, -0.17254, which locates the district, not a building.

Companies registered in NW3

Companies House lists 8,277 companies with a registered office in NW3; 2,973 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 NW3

• Greater London
• London
• Camden
• Hampstead
• Barnet
• Finchley
• Camden Town

Roads filed under NW3

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.

• Adamson Road
• Adelaide Road
• Admiral's Walk
• Agincourt Road
• Ainger Road
• Akenside Road
• Alan Cheales Way
• Antrim Grove
• Antrim Road
• Arkwright Road
• Aspern Grove
• Back Lane
• Bakers Passage
• Baynes Mews
• Beaumont Gardens
• Beaumont Walk
• Beechworth Close
• Belsize Avenue
• Belsize Court Gardens
• Belsize Crescent
• Belsize Grove
• Belsize Lane
• Belsize Mews
• Belsize Park
• Belsize Park Gardens
• Belsize Park Mews
• Belsize Place
• Belsize Square
• Belsize Terrace
• Birchwood Drive
• Bird in Hand Yard
• Boades Mews
• Bracknell Gardens
• Bracknell Way
• Branch Hill
• Briardale Gardens
• Briary Close
• Brocas Close
• Buckland Crescent
• Burdett Mews
• Byron Mews
• Cannon Hill
• Cannon Lane
• Cannon Place
• Carlingford Road
• Carlton Close
• Cenacle Close
• Chalcot Gardens
• Chesterford Gardens
• Christchurch Hill
• Christchurch Passage
• Church Row
• Clorane Gardens
• Coach House Yard
• College Crescent
• Columbas Drive
• Constantine Road
• Conybeare
• Copperbeech Close
• Courthope Road

Check an address in NW3

Check an address in NW3

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=NW3" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about NW3

What does an NW3 postcode tell you?

That the address lies in the NW3 district of the NW (North West London) postcode area, and the place OS Open Names most often lists first for its postcodes is Hampstead. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 1,318 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 NW3

• NW51.9 km
• NW62.0 km
• NW82.2 km
• NW12.9 km
• N63.0 km
• N193.3 km
• W93.4 km
• NW23.4 km
• NW113.4 km
• N1C3.7 km
• N73.8 km
• W1H3.9 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids