Watford · WD25
Gas safety certificate in WD25 (Garston)? We'll point you the right way.
Covering Garston, Aldenham, Leavesden, Letchmore Heath, including Aldenham West, Bushey North, Bushey St James. Find Gas Safe registered engineers nearby.
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Request a gas safety certificate in WD25 (Garston)
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Request a gas safety certificate in WD25 (Garston)
How to check a gas safety engineer is registered: see the Watford page.
WD25 (Garston) in a nutshell
WD25 covers Garston, Aldenham, Leavesden, Letchmore Heath, in Hertsmere and St Albans and Three Rivers and Watford. Give your full postcode when you ask for quotes, so the pro can confirm they cover your street.
Local tips for WD25
Two councils in one district
WD25 is split between Hertsmere and St Albans and Three Rivers and Watford. 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
WD25 stretches across Aldenham West, Bushey North, Bushey St James and more, so give your full postcode, not just 'WD25', when you ask for quotes.
Where's this from?
postcodes.io (ONSPD) wardsMostly mains gas round here
Most homes in Watford run on mains gas, so a standard boiler-and-hob check is what most people need.
Where's this from?
ONS Census 2021, Watford: 75.6% 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.
More detail on the Watford page. Always double-check on GOV.UK.
Next door to WD25
Frequently asked questions
Which areas does WD25 cover?
WD25 (Garston, Aldenham, Leavesden, Letchmore Heath) includes the wards of Aldenham West, Bushey North, Bushey St James, Holywell, Leavesden, Leggatts, Meriden, Stanborough, St Stephen, Woodside (ONS Postcode Directory via postcodes.io).
Which postcode districts are next to WD25?
Neighbouring districts include WD24 (North Watford), WD17 (Watford), WD19 (Oxhey) (ONS Postcode Directory via Doogal). A pro covering WD25 may well cover these too, so it's worth asking.
How many homes are in WD25?
About 11,167 households and 27,711 residents at the 2011 Census, across 687 active postcodes (Doogal / ONS Postcode Directory).
Which council area is WD25 in?
WD25 sits in Hertsmere, St Albans, Three Rivers, Watford (postcodes.io). Parliamentary constituency: Hertsmere, South West Hertfordshire, St Albans, Watford.
📊 The numbers behind this page
- Postcode district
- WD25 1
- Areas covered
- Garston, Aldenham, Leavesden, Letchmore Heath 2
- Active postcodes
- 687 3
- Households (2011 Census, via Doogal)
- 11,167 2
- Population (2011 Census, via Doogal)
- 27,711 2
- Electoral wards
- Aldenham West, Bushey North, Bushey St James, Holywell, Leavesden, Leggatts, Meriden, Stanborough … 4
- Parliamentary constituencies
- Hertsmere, South West Hertfordshire, St Albans, Watford 4
- Local authority
- Hertsmere, St Albans, Three Rivers, Watford 4
- Households heated by mains gas only (Watford built-up area)
- 75.6% 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.