SE1 postcode district

Postcodes and sectors

2,008 of the district's 3,682 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 51.49916, -0.09144, which locates the district, not a building.

Companies registered in SE1

Companies House lists 19,151 companies with a registered office in SE1; 9,426 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 SE1

• Greater London
• London
• Southwark
• Bermondsey
• Lambeth
• Camberwell

Roads filed under SE1

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.

• Abbey Street
• Abbots Lane
• Abercorn Way
• Aberdour Street
• Abingdon Close
• Acanthus Drive
• Achilles Close
• Addington Street
• Ainsdale Drive
• Alaska Street
• Albany Road
• Albert Embankment
• Alderney Mews
• Alice Street
• Alma Grove
• Alscot Road
• Alscot Way
• America Street
• Angel Place
• Aquinas Street
• Archie Street
• Arch Street
• Avocet Close
• Avondale Square
• Avonmouth Street
• Avon Place
• Ayres Street
• Bacon Grove
• Bakery Street
• Balaclava Road
• Bank End
• Bankside
• Barge House Street
• Barnham Street
• Baron's Place
• Bartholomew Street
• Bath Terrace
• Battle Bridge Lane
• Baylis Road
• Bear Gardens
• Bear Lane
• Beatrice Road
• Becket Street
• Bedale Street
• Bedford Row
• Belvedere Buildings
• Belvedere Place
• Belvedere Road
• Bermondsey Square
• Bermondsey Street
• Bittern Street
• Blackfriars Road
• Black Horse Court
• Black Swan Yard
• Bluelion Place
• Borough High Street
• Borough Road
• Borough Square
• Boss Street
• Boundary Row

Check an address in SE1

Check an address in SE1

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=SE1" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about SE1

What does an SE1 postcode tell you?

That the address lies in the SE1 district of the SE (South East London) postcode area, and the place OS Open Names most often lists first for its postcodes is Southwark. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 2,008 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 SE1

• SE1P1.1 km
• SE171.2 km
• EC4R1.3 km
• EC3R1.4 km
• EC4N1.5 km
• EC3M1.6 km
• EC3V1.6 km
• EC4V1.6 km
• EC3N1.7 km
• SE111.7 km
• EC4M1.8 km
• EC2V1.8 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids