Sawbridgeworth · CM21
Gas safety certificate in CM21 (Sawbridgeworth)? We'll point you the right way.
Covering Sawbridgeworth, including Much Hadham, Rural East. Find Gas Safe registered engineers nearby.
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CM21 (Sawbridgeworth) in a nutshell
CM21 covers Sawbridgeworth, in East Hertfordshire and Epping Forest. Give your full postcode when you ask for quotes, so the pro can confirm they cover your street.
Local tips for CM21
Two councils in one district
CM21 is split between East Hertfordshire and Epping Forest. 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
CM21 stretches across Much Hadham, Rural East, Sawbridgeworth, so give your full postcode, not just 'CM21', when you ask for quotes.
Where's this from?
postcodes.io (ONSPD) wardsMostly mains gas round here
Most homes in Sawbridgeworth run on mains gas, so a standard boiler-and-hob check is what most people need.
Where's this from?
ONS Census 2021, Sawbridgeworth: 76.4% 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 CM21
Frequently asked questions
Which areas does CM21 cover?
CM21 (Sawbridgeworth) includes the wards of Much Hadham, Rural East, Sawbridgeworth (ONS Postcode Directory via postcodes.io).
Which postcode districts are next to CM21?
Neighbouring districts include CM17 (Harlow), CM23 (Bishop's Stortford), CM20 (Harlow), CM18 (Harlow), SG10 (Much Hadham) (ONS Postcode Directory via Doogal). A pro covering CM21 may well cover these too, so it's worth asking.
How many homes are in CM21?
About 4,686 households and 10,865 residents at the 2011 Census, across 319 active postcodes (Doogal / ONS Postcode Directory).
Which council area is CM21 in?
CM21 sits in East Hertfordshire, Epping Forest (postcodes.io). Parliamentary constituency: Harlow, Hertford and Stortford.
📊 The numbers behind this page
- Postcode district
- CM21 1
- Areas covered
- Sawbridgeworth 2
- Active postcodes
- 319 3
- Households (2011 Census, via Doogal)
- 4,686 2
- Population (2011 Census, via Doogal)
- 10,865 2
- Electoral wards
- Much Hadham, Rural East, Sawbridgeworth 4
- Parliamentary constituencies
- Harlow, Hertford and Stortford 4
- Local authority
- East Hertfordshire, Epping Forest 4
- Households heated by mains gas only (Sawbridgeworth built-up area)
- 76.4% 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.