Bexley · DA15

Gas safety certificate in DA15 (Sidcup)? We'll point you the right way.

Covering Sidcup, Blackfen, Longlands, Lamorbey, Avery Hill, including Blackfen & Lamorbey, Blendon & Penhill, Crook Log. Find Gas Safe registered engineers nearby.

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Request a gas safety certificate in DA15 (Sidcup)

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Request a gas safety certificate in DA15 (Sidcup)

How to check a gas safety engineer is registered: see the Bexley page.

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DA15 (Sidcup) in a nutshell

DA15 covers Sidcup, Blackfen, Longlands, Lamorbey, Avery Hill, in Bexley and Greenwich. Give your full postcode when you ask for quotes, so the pro can confirm they cover your street.

Local tips for DA15

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Two councils in one district

DA15 is split between Bexley and Greenwich. Some councils run their own landlord licensing, so check which one your home is in.

Where's this from?postcodes.io (ONSPD) local authority
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Give your full postcode

DA15 stretches across Blackfen & Lamorbey, Blendon & Penhill, Crook Log and more, so give your full postcode, not just 'DA15', when you ask for quotes.

Where's this from?postcodes.io (ONSPD) wards
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Postcodes change here

Lots of old DA15 postcodes have been retired. If an old letter shows a different postcode, use your current one.

Where's this from?Doogal/ONSPD: 499 of 861 postcodes active
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New to gas safety certificates? Here's what to expect, how to get ready and what it costs, in plain English. Read the quick guide →

England 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 Bexley page. Always double-check on GOV.UK.

Next door to DA15

DA14 · SidcupDA16 · WellingDA5 · BexleySE9 · ElthamBR5 · OrpingtonDA6 · Bexleyheath

← Gas safety (CP12) across Bexley · all areas

Frequently asked questions

Which areas does DA15 cover?

DA15 (Sidcup, Blackfen, Longlands, Lamorbey, Avery Hill) includes the wards of Blackfen & Lamorbey, Blendon & Penhill, Crook Log, Eltham Town & Avery Hill, Falconwood & Welling, Longlands, Sidcup (ONS Postcode Directory via postcodes.io).

Which postcode districts are next to DA15?

Neighbouring districts include DA14 (Sidcup), DA16 (Welling), DA5 (Bexley), SE9 (Eltham), BR5 (Orpington) (ONS Postcode Directory via Doogal). A pro covering DA15 may well cover these too, so it's worth asking.

How many homes are in DA15?

About 11,279 households and 29,123 residents at the 2011 Census, across 499 active postcodes (Doogal / ONS Postcode Directory).

Which council area is DA15 in?

DA15 sits in Bexley, Greenwich (postcodes.io). Parliamentary constituency: Bexleyheath and Crayford, Eltham and Chislehurst, Old Bexley and Sidcup.

📊 The numbers behind this page
Postcode district
DA15 1
Areas covered
Sidcup, Blackfen, Longlands, Lamorbey, Avery Hill 2
Active postcodes
499 3
Households (2011 Census, via Doogal)
11,279 2
Population (2011 Census, via Doogal)
29,123 2
Electoral wards
Blackfen & Lamorbey, Blendon & Penhill, Crook Log, Eltham Town & Avery Hill, Falconwood & Welling, Longlands, Sidcup 4
Parliamentary constituencies
Bexleyheath and Crayford, Eltham and Chislehurst, Old Bexley and Sidcup 4
Local authority
Bexley, Greenwich 4
Households heated by mains gas only (Bexley built-up area)
79.4% 5
  1. ONS Postcode Directory
  2. Doogal
  3. Doogal / ONSPD
  4. postcodes.io
  5. ONS Census 2021

Made with open data. See where it all comes from. Updated 26 October 2026.