HOW TO HIRE · PLUMBING & HEATING · CHECKED OCTOBER 2026
How to hire an immersion heater fitter in Ireland
The checks, the questions and the paperwork.
An immersion heater installation in Ireland costs €150–€400 per install, typically around €250. Here is how to check that in a minute, what to ask before you book, and what you must be handed when the job is done.
- Search and compare — no account needed
- Nearest to you first
- One score from Google, Trustpilot and Locufy reviews
THE 60-SECOND VERSION
Hiring an immersion heater fitter in five steps
- Are you on the Registered Gas Installer scheme, and what is your number?A number you can look up yourself before you agree a price — post-Installation Support — professionals often provide guidance on how to operate the new immersion heater efficiently.
- Will I get declaration of Conformance Certificate, and when?On the day the work is finished and tested, not posted on later — installation Process — the installation will involve fitting the immersion heater to your existing water tank or system.
- How does complexity of the installation change the price?An unusual brief takes longer to understand before it can be quoted. — ask before the quote rather than after.
- How does type of immersion heater chosen change the price?The standard you ask for decides how long it takes to reach. — ask before the quote rather than after.
- How does any additional plumbing or electrical work required change the price?It decides whether a specialist is needed at all. — ask before the quote rather than after.
BEFORE YOU BOOK
Check before you book
Registered Gas Installer (RGI) Scheme
Restricted to Registered Gas Installer (RGI): installing, servicing or repairing a gas boiler; any work on gas pipework or a gas appliance; commissioning a gas appliance.
Search the Registered Gas Installer scheme for the name or the registration number before you agree a price. rgii.ie →
Declaration of Conformance Certificate
Issued by the Registered Gas Installer on completion of the gas works. It matters because it is the record that the work conforms to the standards, and it is asked for on sale, remortgage and insurance.
Agree before the work starts that you will be handed declaration of conformance certificate, and keep it with the house papers.
Insurance
Expect public liability; ask who the insurer is. From a company, ask for the insurer, the limit and the VAT number, and ask who actually attends: the team that turns up may be employed, subcontracted or both, and only one of those is supervised by the firm you are paying.
Ask to see the current certificate of insurance — the insurer's name, the limit and the date it runs to.
Trader or private seller
Under the Consumer Rights Act 2022 a trader must tell you they are a trader, and your consumer rights — work carried out with reasonable skill and care, and a cooling-off period on a contract agreed in your home or online — apply to traders and not to private sellers. On Locufy the trader status is shown on the profile.
Look for the trader badge on the Locufy profile, and ask anyone else for it in writing before you agree a price.
VAT
VAT at 13.5%, the reduced rate Revenue publishes for this service. Ask whether the price you were given includes it. A trader under the €42,500 registration threshold does not charge it; one over it must, and must show it separately.
Ask whether the figure you were given includes it, and for the VAT number if they are registered — Revenue publishes the rate for this service. revenue.ie →
A good answer: A number you can look up yourself before you agree a price — post-Installation Support — professionals often provide guidance on how to operate the new immersion heater efficiently.
A good answer: On the day the work is finished and tested, not posted on later — installation Process — the installation will involve fitting the immersion heater to your existing water tank or system.
A good answer: An unusual brief takes longer to understand before it can be quoted. — ask before the quote rather than after.
A good answer: The standard you ask for decides how long it takes to reach. — ask before the quote rather than after.
A good answer: It decides whether a specialist is needed at all. — ask before the quote rather than after.
A good answer: Typically, the installation service does not cover the cost of the immersion heater itself or any major plumbing system upgrades — get the exclusions named in the quote, because a immersion heater fitter job is priced on what was agreed and not on what was assumed.
A good answer: Expect public liability; ask who the insurer is — initial Consultation — A qualified plumber will assess your current heating system and discuss your needs.
Getting the quote right
- Complexity of the installation — an unusual brief takes longer to understand before it can be quoted.
- Type of immersion heater chosen — the standard you ask for decides how long it takes to reach.
- Any additional plumbing or electrical work required — it decides whether a specialist is needed at all.
- Condition of the existing system — the condition decides whether this is a touch-up or a rebuild.
- In writing before anyone starts — a message on Locufy counts
- What is NOT included, named
- Who actually attends, and whether they are employed or subcontracted
- The VAT number, and whether it checks out on the Revenue register
Walk away if
- They are not on the Registered Gas Installer scheme, or the number does not resolve to the name on the quote
- No Declaration of Conformance Certificate is offered, or you are told you do not need one for work of this kind
- They will not talk about it: complexity of the installation — an unusual brief takes longer to understand before it can be quoted
- They will not talk about it: type of immersion heater chosen — the standard you ask for decides how long it takes to reach
- They will not talk about it: any additional plumbing or electrical work required — it decides whether a specialist is needed at all
- A price for the immersion heater fitter before anyone has asked the size, the access or the condition of what they are working on
What an immersion heater fitter costs: €150–€400 per install
The figures are for the job, per install, and a quote for your own is the only number that binds anyone. Replacement of old immersion heater and New immersion heater installation each carry their own band. Immersion Heater Installation price guide →
Guide prices compiled by the Locufy team from published Irish and UK provider price lists and 2026/27 cost guides. Updated 2026.
KNOW WHAT TO LOOK FOR? NOW FIND ONE
Immersion heater fitters near you, with the badges that matter shown
ID checked, trader status and one score from every review — on the card, before you message anyone. Nearest first. No account needed to look.
Or post the job free and let them come to you.
- Look firstComplexity of the installation — an unusual brief takes longer to understand before it can be quoted — that is what the immersion heater fitter is judging on the first visit, and a price given without it is a guess.
- Agree what is being doneType of immersion heater chosen — the standard you ask for decides how long it takes to reach — put in writing before anyone starts, because it is the document you both read back at the end.
- The work itselfAny additional plumbing or electrical work required — it decides whether a specialist is needed at all — and anything found on the day that was not in that is priced before it is started.
- Check it togetherCondition of the existing system — the condition decides whether this is a touch-up or a rebuild — walked against the written scope rather than against the feeling of it, while the immersion heater fitter is still there.
- What you are handedDeclaration of Conformance Certificate, the invoice and any guarantee on the workmanship and the parts, check that the immersion heater complies with local safety regulations and standards.
- Initial Consultation
- A qualified plumber will assess your current heating system and discuss your needs.
- Installation Process
- The installation will involve fitting the immersion heater to your existing water tank or system.
- Post-Installation Support
- Professionals often provide guidance on how to operate the new immersion heater efficiently.
- Replacement of Old Immersion Heater
- This involves removing an outdated or malfunctioning immersion heater and installing a new one that meets current safety standards.
- New Immersion Heater Installation
- This service includes installing a new immersion heater in a property that previously did not have one, requiring new electrical and plumbing connections.
- Immersion Heater Repair
- Repairing a malfunctioning immersion heater, which may include replacing faulty elements or thermostats to restore functionality.
AFTER
When the job is done
Hiring an immersion heater fitter: questions people ask
The cost can vary based on the complexity of the installation, the type of immersion heater chosen, and any additional plumbing or electrical work required. Access to existing plumbing and the location of the installation can also affect the overall price.
Installation of an immersion heater usually takes between 2 to 4 hours, depending on the complexity of the job and the condition of the existing plumbing. More extensive modifications may require additional time.
Same-day installation may be possible in urgent situations, but it depends on the availability of technicians and the specific requirements of your installation. It's best to contact local service providers directly for this option.
Yes, many service providers offer package deals for multiple plumbing services, which can save you time and potentially reduce costs. Discuss your needs with your plumber to see what options are available.
Typically, the installation service does not cover the cost of the immersion heater itself or any major plumbing system upgrades. Additionally, any repairs needed due to existing issues may fall outside the scope of the installation.
Search the name or the registration number. If the number does not resolve to the name on the quote, stop there.
MORE GUIDES
More hiring guides in plumbing & heating
Immersion heater fitters near you
Sources — checked October 2026
- CRU — RGI and Safe Electric schemes
- RGI — find a Registered Gas Installer
- CCPC — your rights when you buy a service
- Consumer Rights Act 2022
- Revenue — BOILERS - MAINTENANCE/REPAIR ( Private dwellings/Non-residential immovable goods ) — Reduced rate
- Revenue — current VAT rates (effective 1 January 2026)
- Revenue — VAT thresholds: €42,500 for a person supplying services only