Holywood · BT18

Plumbing compliance check in BT18 (Holywood)? We'll point you the right way.

Covering Holywood, Craigavad, including Belmont, Cultra, Dundonald. Find plumbers nearby.

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BT18 (Holywood) in a nutshell

BT18 covers Holywood, Craigavad, in Ards and North Down and Belfast and Lisburn and Castlereagh. Give your full postcode when you ask for quotes, so the pro can confirm they cover your street.

Local tips for BT18

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Two councils in one district

BT18 is split between Ards and North Down and Belfast and Lisburn and Castlereagh. 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

BT18 stretches across Belmont, Cultra, Dundonald and more, so give your full postcode, not just 'BT18', when you ask for quotes.

Where's this from?postcodes.io (ONSPD) wards
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Own your home? This is for you too.

It's not just for landlords. Homeowners and buyers use these checks for peace of mind too.

Where's this from?NISRA Census 2021, Holywood: 68.9% owner-occupied
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New to plumbing compliance checks? Here's what to expect, how to get ready and what it costs, in plain English. Read the quick guide →

Northern Ireland landlord rules: quick version

  • Repair: keep water and sanitation in repair; assess Legionella risk.
  • Register: with the Landlord Registration Scheme.

More detail on the Holywood page. Always double-check on nidirect.

Next door to BT18

BT16 · DundonaldBT4 · BelfastBT5 · BelfastBT3 · BelfastBT38 · CarrickfergusBT37 · Newtownabbey

← Plumbing & water compliance across Holywood · all areas

Frequently asked questions

Which areas does BT18 cover?

BT18 (Holywood, Craigavad) includes the wards of Belmont, Cultra, Dundonald, Garnerville, Holywood, Loughview, Stormont (ONS Postcode Directory via postcodes.io).

Which postcode districts are next to BT18?

Neighbouring districts include BT16 (Dundonald), BT4 (Belfast), BT5 (Belfast), BT3 (Belfast), BT38 (Carrickfergus) (ONS Postcode Directory via Doogal). A pro covering BT18 may well cover these too, so it's worth asking.

How many homes are in BT18?

About 5,552 households and 13,516 residents at the 2011 Census, across 393 active postcodes (Doogal / ONS Postcode Directory).

Which council area is BT18 in?

BT18 sits in Ards and North Down, Belfast, Lisburn and Castlereagh (postcodes.io). Parliamentary constituency: Belfast East, North Down.

📊 The numbers behind this page
Postcode district
BT18 1
Areas covered
Holywood, Craigavad 2
Active postcodes
393 3
Households (2011 Census, via Doogal)
5,552 2
Population (2011 Census, via Doogal)
13,516 2
Electoral wards
Belmont, Cultra, Dundonald, Garnerville, Holywood, Loughview, Stormont 4
Parliamentary constituencies
Belfast East, North Down 4
Local authority
Ards and North Down, Belfast, Lisburn and Castlereagh 4
Households in converted/shared houses (Holywood settlement)
2.4% 5
  1. ONS Postcode Directory
  2. Doogal
  3. Doogal / ONSPD
  4. postcodes.io
  5. NISRA Census 2021

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