Looking for a plumber across Belfast? NI Trades is an introduction service that matches Northern Ireland homeowners with plumbers who have passed our application-stage checks. Belfast is one of 11 NI council districts; tradespeople choose the councils they cover, so picking a council means you reach every plumber who works anywhere in this district. Post your job in two minutes - only profiles of plumbers interested in your specific job are revealed, and your contact details stay private until you choose who to talk to. Insurance, credentials and references are checked at application stage only - please verify current insurance and credentials directly with any tradesperson before work begins or any money is paid.
What hiring a plumber in Belfast looks like
Belfast is Northern Ireland's capital and its densest urban district, home to around 345,000 people across towns like Belfast. Belfast is dominated by Victorian and Edwardian terraces in the inner suburbs, 1930s semis around the outer ring, and a growing stock of apartments in the city centre and Titanic Quarter, alongside a large private-rented and HMO sector.
For a plumber that usually means leak repairs, bathroom installs and central-heating work. Most of Belfast is served by the Phoenix natural-gas network, so gas central heating is common here, though older terraces and conversions still turn up oil and solid-fuel systems.
Belfast at a glance
Population
around 345,000 (2021 Census)
District
Northern Ireland's capital and its densest urban district
Heating
Most of Belfast is served by the Phoenix natural-gas network, so gas central heating is common here, though older terraces and conversions still turn up oil and solid-fuel systems.
Extension Building Control fee
around £420 (Full Plans, 2026)
Sources: NISRA Census 2021 (population); each council's published Building Control fees schedule (2026 snapshot, fees rise each April); Phoenix Energy, firmus energy and the Gas to the West project (gas-network coverage).
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How it works
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Post your job
Describe what needs doing and confirm your job is in Belfast. Tradespeople see only the job - never your contact details.
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Get notified of interest
When a vetted tradesperson expresses interest you get a notification. Maximum 3 per job - no spam.
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Choose and connect
Only profiles of tradespeople interested in your specific job are revealed. You decide who to contact.
Building Control and approvals in Belfast
If your plumber job involves building, electrical, heating or drainage work that needs sign-off, it is approved by Belfast City Council's own Building Control office, not a UK-wide body. A typical domestic extension on the Full Plans route costs around £420 in Belfast as of 2026, and Building Control fees across the 11 NI councils rise each April.
Before work starts, check whether you also need planning permission: see our NI planning permission guide and NI Building Regulations guide. Council Building Control applications across Northern Ireland go through Building Control NI.
Common services
- Burst pipe repair & prevention
- Boiler installation & servicing
- Full bathroom fitting
- Shower installation & repair
- Radiator fitting & balancing
- Leak detection & repair
- Central heating installation
- Hot water cylinder replacement
- Outside tap installation
- Power flushing
- Underfloor heating
- Drain clearance & CCTV
What to ask before hiring
- Are you Gas Safe registered? (required for gas work)
- Do you offer a guarantee on parts and labour?
- Are you fully insured with public liability cover?
- Will you provide a written quote?
- Can you provide references from similar jobs?
- Do you supply materials or should I source them?
- How will you handle any unexpected problems?
Typical costs in Northern Ireland
| Job type | Typical price | Notes |
|---|
| Hourly rate | £40–£60/hr | Day rate typically £200–£350 |
| Leaky tap repair | £50–£150 | Depends on tap type and access |
| Toilet repair | £60–£200 | Flush mechanisms to full replacement |
| Boiler service | £80–£120 | Annual recommended |
| New boiler installation | £1,500–£3,500 | Supply and fit, inc. labour |
| Full bathroom installation | £1,900–£7,400 | Excludes suite cost |
| Central heating system | £3,000–£6,000 | Full system, new build or retrofit |
| Emergency call-out | £100–£300 | Out of hours rates apply |
Qualifications & accreditations to look for
Gas Safe Register
Legally required for any gas work in the UK
City & Guilds NVQ Level 2/3
Core plumbing and heating qualification
CIPHE Membership
Chartered Institute of Plumbing & Heating Engineering
WaterSafe Approved
Approved contractor for water supply work
Public Liability Insurance
Minimum £1m — required on NI Trades
Frequently asked questions
Do I need a plumber or a gas engineer?
If your job involves any gas appliances — boilers, gas cookers, gas fires — you need someone who is Gas Safe registered. Many plumbers are also Gas Safe registered and can handle both. If the job is purely water-based (leaks, taps, showers), any qualified plumber can help.
How long does a boiler installation take?
A straightforward boiler swap typically takes 1–2 days. If you are changing boiler type (e.g. from back boiler to combi) or relocating the boiler, it may take 2–3 days. Always get the work certified with a Gas Safe certificate on completion.
Should I supply my own materials?
Many plumbers prefer to source materials themselves as they have trade accounts and can guarantee the quality. However, if you already have a suite or fixtures you want fitted, a good plumber will work with them. Discuss this upfront and get it confirmed in writing.
What is power flushing and do I need it?
Power flushing cleans sludge and debris from your heating system using high-velocity water. It is typically recommended before a new boiler installation, or if some radiators are cold at the bottom while others are fully hot. It costs £300–£600 and extends the life of your boiler significantly.
Helpful NI guides for hiring a plumber
Important
If your job involves gas — even a gas cooker connection — your plumber must be Gas Safe registered by law. Always ask to see their Gas Safe ID card before work starts.
Belfast is part of our Northern Ireland directory. NI Trades is an introduction service, we list tradespeople who have passed our application-stage checks, but we are not party to any contract you enter into with a tradesperson. See how we vet tradespeople or browse all trade categories.