Written by Mark Reid,
Trades Editor ·Verified 31 October 2026
Cardiff's housing stock is unusually varied for a Welsh capital, and that variety shapes what you'll need from a plumber before you even pick up the phone. Victorian terraces in Roath and Pontcanna often come with original lead or iron pipework that needs careful assessment before any new fittings go in. Inter-war semis across Canton, Rhiwbina, and Llandaff North are frequently still running on outdated copper systems that weren't sized for modern combi boilers. Newer builds in Cardiff Bay and developments around Cardiff Gate, meanwhile, tend to use plastic push-fit throughout, which most plumbers handle differently from traditional soldered joints. Cardiff's geography adds its own pressures too. Properties close to the River Taff and the Rhymney floodplain see higher groundwater levels that can complicate drainage runs and soil pipe layouts. It's worth knowing what type of system your property has before you call anyone.
Every business listed on this page was drawn from third-party business listings and ranked by public review rating alongside total review count, with a small ranking lift applied to businesses that have a working website and a contactable phone number. We read each business's homepage to confirm that plumbing is what they primarily offer, which is how unrelated trades get kept off this page. Any listing flagged as permanently closed is removed automatically. You'll notice some businesses carry a Trust Verified badge. That badge means the business has additionally passed our full verification process, covering trade qualifications and accreditations, public liability insurance, trading history, customer review history, and registered company information. You can find the full list of what that involves on our How We Verify page. Businesses without that badge have not been independently verified by us, so those checks are yours to carry out before you book.
When you're comparing plumbers in Cardiff, always ask for a written quote before any work starts, not just a verbal estimate over the phone. For gas work, including boiler repairs, installations, or any work on gas pipework, the engineer must be Gas Safe registered. Ask to see their Gas Safe ID card, not just a business card, and check the registration number directly on the Gas Safe Register website. For larger jobs, ask specifically about public liability insurance and confirm the level of cover. On heating installations, a Building Regulations compliance certificate (sometimes called a Benchmark certificate for boiler work) should be issued on completion. Getting two or three quotes is sensible for any job over a few hundred pounds, because labour rates and parts mark-ups vary considerably across Cardiff postcodes.
How We Select & Rate The Best Plumbers in Cardiff
Rankings on this page are driven by public review rating and review count, pulled from third-party business listings, with a small lift applied to businesses that show a working website and phone number. We check each business's homepage to confirm that plumbing is what they primarily offer, keeping unrelated trades off the page. Permanently-closed listings are removed automatically. Businesses carrying a Trust Verified badge have additionally passed our full verification covering qualifications, accreditations, public liability insurance, trading history, customer review history, and registered company information. See our How We Verify page for the full details. All other businesses on this page have not been independently verified by us, and inclusion is not an endorsement. Always do your own checks before hiring.
Recommended and Featured listings are paid placements, so a business's fee affects whether and where it appears. Every other listing is ranked on rating and review count from third-party business listings. How we rank & verify →
N.J Harkus Plumbing and Heating Ltd provides comprehensive plumbing and heating services throughout Cardiff. Their experienced team handles both residential and commercial plumbing installations, repairs, and heating system maintenance across the Cardiff area.
DM Pritchard Plumbing and Heating provides comprehensive plumbing and heating services across Cardiff from their Pontcanna base. The company takes on residential and commercial plumbing work, and their experienced team handles everything from emergency repairs to heating system installations throughout the Cardiff area.
Llandaff Heating provides plumbing services to customers across Cardiff. Their team handles a range of plumbing work for residential and commercial properties throughout the Cardiff region.
Let's Heat provides plumbing services across Cardiff, handling a full range of domestic and commercial plumbing work throughout the area. The company covers plumbing installations, repairs and maintenance.
MPH PLUMBERS provides professional plumbing services throughout Cardiff. Their experienced team handles residential and commercial plumbing requirements across the Cardiff area.
PHBLUE provides plumbing and heating services across Cardiff. They offer comprehensive plumbing and heating solutions for residential and commercial properties throughout the Cardiff area.
RM Plumbing & Electrical Ltd provides plumbing and electrical services to customers across Cardiff. Their dual expertise in both plumbing and electrical work offers convenient solutions for residential and commercial properties in the Cardiff area.
Pen-y-lan Plumbing and Heating provides comprehensive plumbing and heating services throughout Cardiff. They handle both residential and commercial plumbing installations, repairs, and heating system maintenance for properties across the Cardiff area.
Cardiff And Caerphilly Plumbers provides professional plumbing services across Cardiff and the surrounding Caerphilly area, covering both residential and commercial plumbing needs. Their experienced team handles everything from emergency repairs to planned installations throughout the local area.
Nova Plumbers Ltd provides professional plumbing services to homes and businesses across Cardiff. Their experienced team handles a comprehensive range of plumbing work throughout Cardiff and its surrounding neighbourhoods.
Cheap plumbing company provides plumbing services to Cardiff and surrounding areas. They offer affordable plumbing solutions for residential and commercial properties throughout the Cardiff area.
Cosywarm Heating & Plumbing provides comprehensive plumbing and heating services to customers across Cardiff. Their experienced team handles everything from emergency repairs to system installations, serving both residential and commercial properties throughout the Cardiff area.
Plumbaaid Cardiff provides professional plumbing services to customers across Cardiff. Their experienced plumbers handle a range of residential and commercial plumbing needs throughout the Cardiff region.
The Cardiff Plumbers provides professional plumbing services throughout Cardiff from their base in Rumney. The company handles both residential and commercial plumbing work, offering local expertise for property owners across the city.
Flushways Plumbing & Heating provides plumbing and heating services to customers across Cardiff. Their qualified team handles a range of domestic and commercial plumbing installations, repairs, and heating system maintenance throughout the Cardiff area.
Direct Gas provides emergency plumbing services throughout Cardiff. The company specialises in urgent plumbing repairs and boiler services for residential and commercial properties, with callout services across the Cardiff area.
M Thomas Water Services Ltd provides professional plumbing services from their base in Cardiff. They serve Cardiff and surrounding areas with reliable water services and plumbing solutions.
Boiler installations and central heating work sit at the core of what William Jenkins Contractors Limited offers to homes and properties across Cardiff. The firm carries out plumbing work on both residential and commercial jobs. Locally rooted and straightforward in its approach, it operates without the overhead of a large operation.
Plumbing work in Cardiff and the surrounding area is the focus of CJC Plumbing, a local outfit. The company covers the range of domestic plumbing jobs expected of a neighbourhood tradesperson, from repairs and installations through to general maintenance. CJC Plumbing offers a straightforward point of contact for Cardiff residents needing reliable local plumbers.
KB Heating & Plumbing provides gas boiler engineering services throughout Cardiff. Their engineers handle boiler installations, repairs, and maintenance for residential and commercial properties across the Cardiff area.
Transparency notice: Recommended and Featured listings are paid placements, so a business's fee affects whether and where it appears. All other listings are ranked by a combined score drawn from ratings and review counts published on third-party business listings, plus basic completeness signals such as a working website and phone. A Trust Verified badge means we have independently checked that business's documents; businesses without it have not been independently verified by us. How we verify →
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Emergency callouts typically cost £80-150, with higher rates for evenings and weekends. Standard plumbing repairs like tap replacements or toilet fixes usually run £60-120 per hour plus parts. Boiler installations range from £1,500-3,500 depending on the system type and complexity. Bathroom renovations can cost £3,000-8,000 including labour and materials. Getting two or three quotes for larger jobs is standard practice and helps you understand the going rate.
Do I need a Gas Safe registered plumber for boiler work?
Yes, any work involving gas appliances must be carried out by a Gas Safe registered engineer. This includes boiler repairs, installations, and annual services. Check their Gas Safe card and registration number online before they start work. Non-gas plumbing work like fixing leaks, installing taps, or drainage issues doesn't require Gas Safe registration, but still needs a competent plumber.
How quickly can a plumber attend an emergency in Cardiff?
Most local plumbers aim to reach emergency calls within 1-2 hours during normal working hours. Evening and weekend response times can stretch to 2-4 hours depending on demand. True emergencies like major leaks or gas smells typically get priority. Some firms offer guaranteed response times but charge premium rates. Always turn off your water supply at the stopcock for leaks while waiting.
What should I check before hiring a plumber?
Verify they're properly insured for public liability, typically £1-2 million cover. Check their Google reviews for recent feedback and look for patterns of reliability. For gas work, confirm their Gas Safe registration online. Ask for a written quote that breaks down labour and materials costs. Established local plumbers should provide recent customer references without hesitation.
Can plumbers work on old Victorian houses in Cardiff?
Many Cardiff plumbers specialise in period properties and understand the challenges of Victorian plumbing systems. They're experienced with cast iron soil pipes, original lead supply lines, and the building regulations around updating old systems. Expect higher costs for period property work due to access difficulties and the need to match existing pipework. Always discuss conservation requirements if you're in a listed building.
How do I choose between different plumbers' quotes?
Don't automatically pick the cheapest quote. Compare what's included in each price, the quality of materials specified, and the warranty offered. Check each plumber's recent reviews and ask about their experience with your specific type of job. A detailed written quote that explains the work scope is more reliable than a rough verbal estimate. Factor in their availability and response times for your project timeline.
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