St Albans · AL3
Gas safety certificate in AL3 (St Albans)? We'll point you the right way.
Covering St Albans, Childwickbury, Flamstead, Gorhambury, Markyate, Porters Wood, Redbourn, Sandridge, including Batchwood, Bernards Heath, Caddington. Find Gas Safe registered engineers nearby.
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AL3 (St Albans) in a nutshell
AL3 covers St Albans, Childwickbury, Flamstead, Gorhambury, Markyate, Porters Wood, Redbourn, Sandridge, in Central Bedfordshire and Dacorum and St Albans. Give your full postcode when you ask for quotes, so the pro can confirm they cover your street.
Local tips for AL3
Two councils in one district
AL3 is split between Central Bedfordshire and Dacorum and St Albans. 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
AL3 stretches across Batchwood, Bernards Heath, Caddington and more, so give your full postcode, not just 'AL3', when you ask for quotes.
Where's this from?
postcodes.io (ONSPD) wardsMostly mains gas round here
Most homes in St Albans run on mains gas, so a standard boiler-and-hob check is what most people need.
Where's this from?
ONS Census 2021, St Albans: 80.1% 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.
More detail on the St Albans page. Always double-check on GOV.UK.
Next door to AL3
Frequently asked questions
Which areas does AL3 cover?
AL3 (St Albans, Childwickbury, Flamstead, Gorhambury, Markyate, Porters Wood, Redbourn, Sandridge) includes the wards of Batchwood, Bernards Heath, Caddington, Harpenden North & Rural, Harpenden South, Hill End, Redbourn, Sandridge & Wheathampstead, St Peters, Verulam, Watling (ONS Postcode Directory via postcodes.io).
Which postcode districts are next to AL3?
Neighbouring districts include AL5 (Harpenden), AL1 (St Albans), AL4 (St Albans), AL2 (St Albans), HP2 (Gaddesden Row) (ONS Postcode Directory via Doogal). A pro covering AL3 may well cover these too, so it's worth asking.
How many homes are in AL3?
About 11,197 households and 28,025 residents at the 2011 Census, across 955 active postcodes (Doogal / ONS Postcode Directory).
Which council area is AL3 in?
AL3 sits in Central Bedfordshire, Dacorum, St Albans (postcodes.io). Parliamentary constituency: Harpenden and Berkhamsted, Luton South and South Bedfordshire, St Albans.
📊 The numbers behind this page
- Postcode district
- AL3 1
- Areas covered
- St Albans, Childwickbury, Flamstead, Gorhambury, Markyate, Porters Wood, Redbourn, Sandridge 2
- Active postcodes
- 955 3
- Households (2011 Census, via Doogal)
- 11,197 2
- Population (2011 Census, via Doogal)
- 28,025 2
- Electoral wards
- Batchwood, Bernards Heath, Caddington, Harpenden North & Rural, Harpenden South, Hill End, Redbourn, Sandridge & Wheathampstead … 4
- Parliamentary constituencies
- Harpenden and Berkhamsted, Luton South and South Bedfordshire, St Albans 4
- Local authority
- Central Bedfordshire, Dacorum, St Albans 4
- Households heated by mains gas only (St Albans built-up area)
- 80.1% 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.