SE3 postcode district

Postcodes and sectors

795 of the district's 1,360 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 51.46897, 0.02032, which locates the district, not a building.

Companies registered in SE3

Companies House lists 3,152 companies with a registered office in SE3; 574 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 SE3

• London
• Greater London
• Greenwich
• Lewisham

Roads filed under SE3

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.

• Aberdeen Terrace
• All Saints Drive
• Anderson Road
• Angerstein Lane
• Annesley Road
• Annesmere Gardens
• Armstrong Close
• Arne Walk
• Astell Road
• Baizdon Road
• Balchen Road
• Baldwin Lane
• Banchory Road
• Banks Road
• Beaconsfield Close
• Beaconsfield Road
• Begbie Road
• Bellfield Close
• Bennett Park
• Birchmere Row
• Birdbrook Road
• Blackheath Grove
• Blackheath Park
• Blackheath Vale
• Blackheath Village
• Bournbrook Road
• Bowater Place
• Boyd Way
• Brigade Street
• Broadbridge Close
• Broad Walk
• Brooklands Park
• Brook Lane
• Brookway
• Cambert Way
• Camden Row
• Canal Walk
• Carnbrook Mews
• Carnbrook Road
• Casterbridge Road
• Chichester Close
• Chiswell Square
• Coleraine Road
• Collins Street
• Combe Avenue
• Coppelia Road
• Corelli Road
• Corner Green
• Couthurst Road
• Craigerne Road
• Cranfield Walk
• Cresswell Park
• Crosier Close
• Crossbrook Road
• Dale Close
• Delacourt Road
• Delme Crescent
• Dinsdale Road
• Dornberg Close
• Dornberg Road

Check an address in SE3

Check an address in SE3

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=SE3" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about SE3

What does an SE3 postcode tell you?

That the address lies in the SE3 district of the SE (South East London) postcode area, and the place OS Open Names most often lists first for its postcodes is London. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 795 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 SE3

• SE71.9 km
• SE102.2 km
• SE132.3 km
• SE122.7 km
• SE93.6 km
• SE83.7 km
• SE43.9 km
• SE184.0 km
• SE64.2 km
• SE144.4 km
• E164.6 km
• E144.9 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids