SG4 postcode district

Postcodes and sectors

906 of the district's 1,263 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 51.91945, -0.25940, which locates the district, not a building.

Companies registered in SG4

Companies House lists 2,679 companies with a registered office in SG4; 463 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 SG4

• Hertfordshire
• Eastern
• North Hertfordshire
• Hitchin
• Codicote
• Kimpton
• Weston
• Gosmore
• Whitwell
• Little Wymondley
• Graveley
• Preston
• Breachwood Green
• St Ippolyts
• Great Wymondley
• Ley Green
• Bendish
• The Heath
• Stevenage
• Codicote Bottom
• Langley
• Hall's Green
• St Paul's Walden
• Temple Dinsley

Roads filed under SG4

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.

• Acre Piece
• Allwoods Place
• Alpine Close
• Arch Road
• Armour Rise
• Arnold Close
• Ashbrook Lane
• Ash Drive
• Ashwell Close
• Ashwell Common
• Aston Rise
• Austage End Lane
• Avenue Path
• Back Lane
• Baileys Lane
• Baker's Lane
• Barleybeans Road
• Bayeux Oaks Road
• Beech Crescent
• Bell Close
• Bell Mews
• Benchley Hill
• Bendish Lane
• Benslow Lane
• Benslow Path
• Benslow Rise
• Bentick Way
• Bethell Court
• Bibbs Hall Lane
• Billing Place
• Bilton Road
• Blackhorse Close
• Blackhorse Lane
• Bladon Close
• Blakemore End Road
• Bowmans Avenue
• Bradleys Corner
• Bradway
• Bramfield
• Bramshott Close
• Brick Kiln Lane
• Broadmead
• Broadmeadow Ride
• Brockett Drive
• Brookend Lane
• Brook View
• Browning Drive
• Brownings Lane
• Bullock's Hill
• Burns Close
• Burton Gardens
• Burtons Path
• Bury Lane
• Butcher's Lane
• Buttons Lane
• Byron Close
• Cadwell Lane
• Cambridge Road
• Campbell Close
• Canham Close

Check an address in SG4

Check an address in SG4

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

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=SG4" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about SG4

What does an SG4 postcode tell you?

That the address lies in the SG4 district of the SG (Stevenage) postcode area, and the place OS Open Names most often lists first for its postcodes is Hitchin. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 906 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 SG4

• SG14.4 km
• SG56.1 km
• SG27.0 km
• SG67.1 km
• SG38.4 km
• LU29.7 km
• SG1510.5 km
• AL610.5 km
• SG1610.9 km
• SG711.1 km
• LU112.6 km
• LU312.6 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids