SG1 postcode district

Postcodes and sectors

1,284 of the district's 2,070 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 51.91334, -0.19561, which locates the district, not a building.

Companies registered in SG1

Companies House lists 6,438 companies with a registered office in SG1; 1,201 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 SG1

• Hertfordshire
• Eastern
• Stevenage
• North Hertfordshire
• Rooks Nest
• Todd's Green

Roads filed under SG1

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.

• Abbots Grove
• Aberdovey Way
• Abinger Close
• Admiral Drive
• Aintree Way
• Albert Street
• Aldeburgh Close
• Aldock Road
• Alexander Gate
• Alexandria Close
• Alleyns Road
• Almonds Lane
• Angotts Mead
• Ansell Court
• Appleton Court
• Archer Road
• Argyle Way
• Arnold Close
• Ascot Crescent
• Aspect One
• Avon Drive
• Ayr Close
• Aziz Close
• Babbage Road
• Back Lane
• Bader Close
• Badgers Close
• Baker Street
• Barclay Crescent
• Barclay Gardens
• Baron Court
• Basils Road
• Bawdsey Close
• Bedwell Crescent
• Bedwell Lane
• Bedwell Park
• Bedwell Rise
• Bell Lane
• Benbroke Place
• Berwick Close
• Bessemer Drive
• Beverley Road
• Birdwing Walk
• Blackdown Close
• Blackwater Close
• Blakeney Road
• Blyth Close
• Boswell Gardens
• Botany Bay Lane
• Boulton Road
• Bournemouth Road
• Bowcock Walk
• Bowling Green
• Boxberry Close
• Bradman Way
• Brancaster View
• Bray Drive
• Briardale
• Brick Kiln Road
• Bridge Road

Check an address in SG1

Check an address in SG1

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=SG1" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about SG1

What does an SG1 postcode tell you?

That the address lies in the SG1 district of the SG (Stevenage) postcode area, and the place OS Open Names most often lists first for its postcodes is Stevenage. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 1,284 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 SG1

• SG22.8 km
• SG44.4 km
• SG36.0 km
• SG67.5 km
• SG58.8 km
• AL69.0 km
• SG710.3 km
• SG1512.1 km
• AL812.2 km
• AL713.0 km
• SG1613.3 km
• SG913.4 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids