Longfield, New Ash Green and Hartley · DA3
Gas safety certificate in DA3 (Longfield)? We'll point you the right way.
Covering Longfield, Hartley, Fawkham, including Ash and New Ash Green, Farningham, Horton Kirby and South Darenth, Fawkham and West Kingsdown. Find Gas Safe registered engineers nearby.
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DA3 (Longfield) in a nutshell
DA3 covers Longfield, Hartley, Fawkham, in Dartford and Gravesham and Sevenoaks. Give your full postcode when you ask for quotes, so the pro can confirm they cover your street.
Local tips for DA3
Two councils in one district
DA3 is split between Dartford and Gravesham and Sevenoaks. 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
DA3 stretches across Ash and New Ash Green, Farningham, Horton Kirby and South Darenth, Fawkham and West Kingsdown and more, so give your full postcode, not just 'DA3', when you ask for quotes.
Where's this from?
postcodes.io (ONSPD) wardsMostly mains gas round here
Most homes in Longfield, New Ash Green and Hartley run on mains gas, so a standard boiler-and-hob check is what most people need.
Where's this from?
ONS Census 2021, Longfield, New Ash Green and Hartley: 79.8% 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 DA3
Frequently asked questions
Which areas does DA3 cover?
DA3 (Longfield, Hartley, Fawkham) includes the wards of Ash and New Ash Green, Farningham, Horton Kirby and South Darenth, Fawkham and West Kingsdown, Hartley and Hodsoll Street, Longfield, New Barn & Southfleet, Meopham North (ONS Postcode Directory via postcodes.io).
Which postcode districts are next to DA3?
Neighbouring districts include DA13 (Meopham), DA10 (Swanscombe), DA4 (Dartford), DA9 (Greenhithe), DA11 (Gravesend – west) (ONS Postcode Directory via Doogal). A pro covering DA3 may well cover these too, so it's worth asking.
How many homes are in DA3?
About 6,802 households and 16,791 residents at the 2011 Census, across 355 active postcodes (Doogal / ONS Postcode Directory).
Which council area is DA3 in?
DA3 sits in Dartford, Gravesham, Sevenoaks (postcodes.io). Parliamentary constituency: Dartford, Gravesham, Sevenoaks, Tonbridge.
📊 The numbers behind this page
- Postcode district
- DA3 1
- Areas covered
- Longfield, Hartley, Fawkham 2
- Active postcodes
- 355 3
- Households (2011 Census, via Doogal)
- 6,802 2
- Population (2011 Census, via Doogal)
- 16,791 2
- Electoral wards
- Ash and New Ash Green, Farningham, Horton Kirby and South Darenth, Fawkham and West Kingsdown, Hartley and Hodsoll Street, Longfield, New Barn & Southfleet, Meopham North 4
- Parliamentary constituencies
- Dartford, Gravesham, Sevenoaks, Tonbridge 4
- Local authority
- Dartford, Gravesham, Sevenoaks 4
- Households heated by mains gas only (Longfield, New Ash Green and Hartley built-up area)
- 79.8% 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.