SG18 postcode district

Postcodes and sectors

764 of the district's 1,009 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 52.08279, -0.26450, which locates the district, not a building.

Companies registered in SG18

Companies House lists 1,813 companies with a registered office in SG18; 211 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 SG18

• Central Bedfordshire
• Eastern
• Biggleswade
• Langford
• Upper Caldecote
• Dunton
• Northill
• Broom
• Old Warden
• Ickwell
• Southill
• Stanford
• Holme
• Edworth
• Lower Caldecote
• Newton
• Millow

Roads filed under SG18

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.

• Albone Way
• Alder Drive
• Anderson Road
• Anne Street
• Apollo Gardens
• Appleton Mead
• Apple Tree Close
• Arnold Rise
• Ashby Court
• Ashby Drive
• Ash Grove
• Ashley Gardens
• Ash Road
• Aston Croft
• Auckland Road
• Avocet Close
• Avon Rise
• Axus Close
• Babbage Lane
• Back Street
• Baden-Powell Way
• Bancroft Avenue
• Bank's Road
• Bantock Way
• Barnett Close
• Barn Field Close
• Barnstaple Walk
• Bedford Road
• Beech Avenue
• Bellflower Gardens
• Bellingham Place
• Bentley Close
• Berkeley Close
• Biggleswade Road
• Binder Place
• Birch Close
• Birch Road
• Bittern Drive
• Blackbird Gardens
• Blackburn Way
• Blomfield Avenue
• Bluebell Close
• Blunham Road
• Boddington Gardens
• Bohr Croft
• Bonds Lane
• Boothey Close
• Boot Lane
• Borden Lane
• Bose Avenue
• Bramble Corner
• Brigham Gardens
• Broadmead
• Brookbanks
• Brook Close
• Brown Avenue
• Brunel Drive
• Brunswick Close
• Brunt's Lane
• Bryants Edge

Check an address in SG18

Check an address in SG18

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=SG18" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about SG18

What does an SG18 postcode tell you?

That the address lies in the SG18 district of the SG (Stevenage) postcode area, and the place OS Open Names most often lists first for its postcodes is Biggleswade. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 764 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 SG18

• SG196.5 km
• SG177.2 km
• SG157.7 km
• SG168.0 km
• SG710.6 km
• SG611.9 km
• SG512.3 km
• MK4214.6 km
• MK4114.7 km
• MK4515.5 km
• MK4015.8 km
• MK4416.7 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids