Cardiff · Wales
Plumbing and heating checks in Cardiff
What you need: Water, heating and sanitation kept in good repair, plus a Legionella risk assessment for the let.
How often: Fit to live in: keep water, drainage and heating in repair.
Free to use · No sign-up · Always check their registration before you book · Search another town or postcode
Request a plumbing compliance check in Cardiff
No plumber listed for Cardiff yet. Tell us what you need and we'll find you a registered plumber, free.
Request a plumbing compliance check in Cardiff
Opens your email app with a short template (address, property type, date needed), addressed to [email protected].
Or check a plumber yourself
- WaterSafe register: approved plumbers across the UK
- Gas Safe Register: if the job touches a gas boiler or gas pipework
There's no single legal register for plumbers, so a scheme listing is a good sign. These are public registers; we're not part of them and they don't endorse us.
Local tips for Cardiff
Older terraces, older pipes
Cardiff has lots of terraced homes. In older ones, ask the plumber to look at shared supply pipes and any old tanks in the loft.
Where's this from?
ONS Census 2021, Cardiff: 29.6% terracedConverted flats and bedsits
Converted houses often share pipework between flats, so a leak upstairs can become your problem. Know where your stopcock is!
Where's this from?
ONS Census 2021, Cardiff: 5.0% converted/shared housesBusy rental market: book early
Lots of people rent in Cardiff, so if you're letting, book a few weeks before a tenancy starts or renews. No last-minute panic.
Where's this from?
ONS Census 2021, Cardiff: 24.3% private rented vs 17.0% Wales🤓 Did you know? (Cardiff edition)
Cardiff had a population of 381,516 in 2025 and forms a principal area officially known as the City and County of Cardiff.
The city is the eleventh largest in the United Kingdom.
Lots of purpose-built flats round here. Check whether the job covers just your flat or the shared areas too.
Source: ONS Census 2021 (TS044): 20.2% purpose-built flats vs 9.4% Wales
Landlord rules in plain English (Wales)
- Fit to live in: keep water, drainage and heating in repair.
- Legionella: assess the risk.
The fuller version
Since 1 December 2022 most private tenancies in Wales are 'occupation contracts' under the Renting Homes (Wales) Act 2016.
Private landlords and agents in Wales must register (and, if managing, be licensed) with Rent Smart Wales.
Landlords must keep water, drainage and heating installations in repair and fit for human habitation; Legionella risk should be assessed (HSE ACOP L8).
Rules differ in England, Wales, Scotland and Northern Ireland, and they do change. This is a friendly summary, not legal advice. Double-check on GOV.WALES.
Your corner of Cardiff
Also covering: CF3, CF11, CF15, CF23, CF24, CF30, CF91, CF95, CF99
Nearby towns
Other checks in Cardiff
Free landlord resources
Letting in Cardiff? Our free, sourced guides for Wales:
Frequently asked questions
Do landlords in Cardiff need a plumbing compliance check?
There's no single plumbing certificate, but landlords must keep water, heating and sanitation in repair and assess Legionella risk. (Summary only; check the official guidance.)
What kind of homes are there in Cardiff?
A mix: about 30% terraced, 30% semi-detached, 14% detached and 20% flats (Census 2021, ONS TS044).
Which postcode districts are in Cardiff?
12 active postcode districts use the Cardiff post town, from CF3 to CF99 (ONS Postcode Directory via Doogal). District pages on this site: CF10, CF14, CF5.
Nobody covers my part of Cardiff yet. Where else can I look?
The nearest other towns we list are Bristol (~25 miles), Swansea (~34 miles), Exeter (~55 miles), measured straight-line between OS Open Names centres. A plumber based there may travel, so ask.
How many homes in Cardiff are privately rented?
24.3% of 147,333 households rented privately at the 2021 Census (ONS TS054); 17.2% rented from a council or housing association.
📊 The numbers behind this page
- Households (Cardiff local authority)
- 147,333 Source: ONS Census 2021 (TS054)
- Terraced homes (Cardiff local authority)
- 29.6% Source: ONS Census 2021 (TS044)
- Households in converted/shared houses incl. bedsits (Cardiff local authority)
- 5.0% Source: ONS Census 2021 (TS044)
- Households in purpose-built flats (Cardiff local authority)
- 20.2% Source: ONS Census 2021 (TS044)
- Households privately renting (Cardiff local authority)
- 24.3% Source: ONS Census 2021 (TS054)
- Population (GeoNames gazetteer)
- 372,089 Source: GeoNames, CC BY 4.0
- Active postcode districts with this post town
- 12 Source: Doogal / ONS Postcode Directory
- Local authority
- Cardiff Source: postcodes.io (ONSPD)
- Region / nation
- Wales Source: OS Open Names via postcodes.io
- Nearest listed town
- Bristol (~25 miles) Source: Calculated from OS Open Names coordinates
Made with open data. See where it all comes from. Updated 23 October 2026.