Sudbury · CO10
Gas safety certificate in CO10 (Sudbury)? We'll point you the right way.
Covering Sudbury, including Assington, Box Vale, Brett Vale. Find Gas Safe registered engineers nearby.
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CO10 (Sudbury) in a nutshell
CO10 covers Sudbury, in Babergh and Braintree and West Suffolk. Give your full postcode when you ask for quotes, so the pro can confirm they cover your street.
Local tips for CO10
Two councils in one district
CO10 is split between Babergh and Braintree and West Suffolk. 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
CO10 stretches across Assington, Box Vale, Brett Vale and more, so give your full postcode, not just 'CO10', when you ask for quotes.
Where's this from?
postcodes.io (ONSPD) wardsMostly mains gas round here
Most homes in Sudbury run on mains gas, so a standard boiler-and-hob check is what most people need.
Where's this from?
ONS Census 2021, Sudbury: 76.5% 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 CO10
Frequently asked questions
Which areas does CO10 cover?
CO10 (Sudbury) includes the wards of Assington, Box Vale, Brett Vale, Bures St Mary & Nayland, Chadacre, Clare, Hundon & Kedington, Great Cornard, Lavenham, Long Melford, North West Cosford, Stour Valley North, Stour Valley South, Sudbury North East, Sudbury North West, Sudbury South East, Sudbury South West, Whepstead & Wickhambrook (ONS Postcode Directory via postcodes.io).
Which postcode districts are next to CO10?
Neighbouring districts include CO8 (Bures), CO6 (Colchester), IP33 (Bury Saint Edmunds), CO9 (Halstead), IP29 (Barrow) (ONS Postcode Directory via Doogal). A pro covering CO10 may well cover these too, so it's worth asking.
How many homes are in CO10?
About 20,497 households and 46,604 residents at the 2011 Census, across 1,682 active postcodes (Doogal / ONS Postcode Directory).
Which council area is CO10 in?
CO10 sits in Babergh, Braintree, West Suffolk (postcodes.io). Parliamentary constituency: Braintree, South Suffolk, West Suffolk.
📊 The numbers behind this page
- Postcode district
- CO10 1
- Areas covered
- Sudbury 2
- Active postcodes
- 1,682 3
- Households (2011 Census, via Doogal)
- 20,497 2
- Population (2011 Census, via Doogal)
- 46,604 2
- Electoral wards
- Assington, Box Vale, Brett Vale, Bures St Mary & Nayland, Chadacre, Clare, Hundon & Kedington, Great Cornard, Lavenham … 4
- Parliamentary constituencies
- Braintree, South Suffolk, West Suffolk 4
- Local authority
- Babergh, Braintree, West Suffolk 4
- Households heated by mains gas only (Sudbury built-up area)
- 76.5% 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.