Bishop's Stortford · CM23
Gas safety certificate in CM23 (Bishop's Stortford)? We'll point you the right way.
Covering Bishop's Stortford, including Bishop's Stortford All Saints, Bishop's Stortford Central, Bishop's Stortford North. Find Gas Safe registered engineers nearby.
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CM23 (Bishop's Stortford) in a nutshell
CM23 covers Bishop's Stortford, in East Hertfordshire and Uttlesford. Give your full postcode when you ask for quotes, so the pro can confirm they cover your street.
Local tips for CM23
Two councils in one district
CM23 is split between East Hertfordshire and Uttlesford. Some councils run their own landlord licensing, so check which one your home is in.
Where's this from?
postcodes.io (ONSPD) local authorityGive your full postcode
CM23 stretches across Bishop's Stortford All Saints, Bishop's Stortford Central, Bishop's Stortford North and more, so give your full postcode, not just 'CM23', when you ask for quotes.
Where's this from?
postcodes.io (ONSPD) wardsMostly mains gas round here
Most homes in Bishop's Stortford run on mains gas, so a standard boiler-and-hob check is what most people need.
Where's this from?
ONS Census 2021, Bishop's Stortford: 79.6% mains gas onlyEngland landlord rules: quick version
- Every year: a check by a Gas Safe registered engineer.
- Within 28 days: give your tenants a copy (new tenants get it before they move in).
- Keep it: hang on to records for at least 2 years.
Always double-check on GOV.UK.
Next door to CM23
Frequently asked questions
Which areas does CM23 cover?
CM23 (Bishop's Stortford) includes the wards of Bishop's Stortford All Saints, Bishop's Stortford Central, Bishop's Stortford North, Bishop's Stortford Parsonage, Bishop's Stortford South, Bishop's Stortford Thorley Manor, Broad Oak & the Hallingburys, Little Hadham & The Pelhams, Sawbridgeworth, Stansted North, Stansted South & Birchanger, Stort Valley (ONS Postcode Directory via postcodes.io).
Which postcode districts are next to CM23?
Neighbouring districts include CM22 (Bishop's Stortford), CM21 (Sawbridgeworth), CM24 (Stansted Mountfitchet), CM17 (Harlow), SG10 (Much Hadham) (ONS Postcode Directory via Doogal). A pro covering CM23 may well cover these too, so it's worth asking.
How many homes are in CM23?
About 16,111 households and 40,376 residents at the 2011 Census, across 1,200 active postcodes (Doogal / ONS Postcode Directory).
Which council area is CM23 in?
CM23 sits in East Hertfordshire, Uttlesford (postcodes.io). Parliamentary constituency: Harlow, Hertford and Stortford, North East Hertfordshire, North West Essex.
📊 The numbers behind this page
- Postcode district
- CM23 1
- Areas covered
- Bishop's Stortford 2
- Active postcodes
- 1,200 3
- Households (2011 Census, via Doogal)
- 16,111 2
- Population (2011 Census, via Doogal)
- 40,376 2
- Electoral wards
- Bishop's Stortford All Saints, Bishop's Stortford Central, Bishop's Stortford North, Bishop's Stortford Parsonage, Bishop's Stortford South, Bishop's Stortford Thorley Manor, Broad Oak & the Hallingburys, Little Hadham & The Pelhams … 4
- Parliamentary constituencies
- Harlow, Hertford and Stortford, North East Hertfordshire, North West Essex 4
- Local authority
- East Hertfordshire, Uttlesford 4
- Households heated by mains gas only (Bishop's Stortford built-up area)
- 79.6% 5
- ONS Postcode Directory
- Doogal
- Doogal / ONSPD
- postcodes.io
- ONS Census 2021
Made with open data. See where it all comes from. Updated 26 October 2026.