SG12 postcode district

Postcodes and sectors

939 of the district's 1,463 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 51.81427, -0.01689, which locates the district, not a building.

Companies registered in SG12

Companies House lists 2,461 companies with a registered office in SG12; 506 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 SG12

• East Hertfordshire
• Hertfordshire
• Eastern
• Ware
• Stanstead Abbotts
• St Margarets
• Great Amwell
• Widford
• Dane End
• Hunsdon
• Thundridge
• Wadesmill
• Chapmore End
• Wareside
• Babbs Green
• Hunsdonbury
• Whempstead
• Tonwell
• Cold Christmas
• Hoddesdon
• Sacombe Green
• Sacombe
• Nether Street
• Newhall Green

Roads filed under SG12

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.

• Abbotts Court
• Abbotts Lane
• Abbotts Rise
• Abbotts Way
• Acorn Street
• Albany Mews
• Aldwyke Rise
• Amberley Green
• Amiens Close
• Amwell End
• Amwell Hill
• Amwell Lane
• Anchor Lane
• Appleton Avenue
• Ash Road
• Baldock Street
• Barleycroft
• Barley Ponds Close
• Barley Ponds Road
• Beacon Road
• Beazley Close
• Beech Close
• Beechfield Road
• Bellevue Road
• Bell Lane
• Benningfield Road
• Berkeley Close
• Black Smiths Close
• Bluecoat Yard
• Bourne Close
• Bourne Honour
• Bowling Road
• Brewery Yard
• Briardale
• Bridge Foot
• Bridle Way
• Broadmeads
• Brocket Meadows
• Brook End
• Bryce Close
• Burgage Lane
• Buryfield Way
• Cameron Court
• Canons Road
• Cappell Lane
• Cautherly Lane
• Cedar Close
• Century Road
• Chadwell
• Chadwell Rise
• Chapelfields
• Chappell Court
• Chauncy Close
• Chestnut Avenue
• Chestnut Close
• Cheyne Close
• Chiltern Close
• Church Field
• Church Lane
• Church Path

Check an address in SG12

Check an address in SG12

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=SG12" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about SG12

What does an SG12 postcode tell you?

That the address lies in the SG12 district of the SG (Stevenage) postcode area, and the place OS Open Names most often lists first for its postcodes is Ware. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 939 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 SG12

• SG134.8 km
• SG145.4 km
• EN115.4 km
• CM927.3 km
• SG107.4 km
• EN108.5 km
• CM198.6 km
• SG118.7 km
• CM209.3 km
• CM1810.7 km
• CM2111.1 km
• AL711.9 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids