RGII-registered engineers · Ireland
Boiler Installation Ireland: Costs, Types and Local Engineers
New boiler or full replacement, with county-by-county guidance on what it costs, which type suits your home, and how to choose a registered engineer for the job.
The law
Boiler Replacement in Ireland: What the Law Requires
All gas boiler installation in Ireland must be carried out by an RGII-registered engineer, a legal requirement under the Gas Safety (Installation and Use) Regulations. An unregistered installer cannot certify the work, your home insurance may be invalidated, and the job cannot be included in a BER certificate.
How Long Does Boiler Installation Take in Ireland?
A like-for-like combi swap takes one working day. Switching boiler type takes two days, while heat pumps take two to three.
SEAI Grants for Heating Upgrades in 2026
Up to €6,500 for heat pump installation and €1,200 for solar water heating, through SEAI-registered contractors.
Local coverage
Boiler Installation by County Throughout Ireland
Boiler installation is never one-size-fits-all. What you pay, whether your home runs on gas, oil or LPG, and how fast a registered engineer can reach you all come down to where in Ireland you live. Choose your county for 2026 pricing that reflects real local costs, the fuel and boiler options that actually apply to your area, and RGII-registered installers working on your doorstep.
Leinster
12 countiesMost of Leinster is on the natural gas grid, so gas combi and system boilers are the common choice, from Dublin’s older terraces swapping out back boilers to new builds across the Meath, Kildare and Wicklow commuter belt. Converting open-vent systems to sealed combis in tight terraced homes is the job installers see most.
Munster
6 countiesCork and Limerick cities sit on the gas network, but much of rural Munster, Kerry and west Cork included, is off-grid on oil or LPG. Oil boiler replacements and oil-to-heat-pump upgrades backed by SEAI grants make up the bulk of installation work across the province.
Connacht
5 countiesNatural gas barely reaches the west, so Galway, Mayo and the surrounding counties rely on oil boilers, LPG and solid fuel. Exposed Atlantic weather and older one-off rural homes mean high heat demand and steady demand for oil boiler and heat pump installations.
Ulster
3 countiesCavan, Monaghan and Donegal are almost entirely off the gas grid, so oil is the mainstay, with LPG and heat pumps close behind. Colder northern winters and older rural housing stock make efficient boiler replacements and insulation-first upgrades a priority here.
Browse RGII engineers in any county in the full gas installer directory.
The options
Gas Boiler Installation Ireland: Which Type Is Right for Your Home?
Combi Boiler
Heats water on demand with no cylinder needed. Ideal for homes under 130 sq m and the most popular choice for Irish houses and apartments. Supply and fit.
System Boiler
Works with a hot water cylinder. Better for larger homes with multiple bathrooms and high hot water demand. Suitable for solar water heating.
Oil Boiler
For homes off the gas network. Modern condensing oil boilers are over 90% efficient. SEAI grants are available when replacing with a heat pump or solar thermal system.
2026 prices
Boiler Installation Cost Ireland 2026: Typical Prices by Job Type
Typical like-for-like ranges. All figures include labour and VAT at 9%.
Combi boiler
€2,200–€3,200
Supply and fit, like-for-like replacement
System boiler
€2,800–€4,000
Supply and fit, includes cylinder if needed
Oil boiler
€3,000–€4,500
Supply and fit, tank inspection may be extra
Fit only
€600–€900
Labour only, customer supplies the boiler
Annual service
€80–€120
Recommended every 12 months
For a full breakdown see our Ireland plumbing costs guide.
SEAI grants
SEAI Grants for Boiler and Heating Upgrades
Grants are available for heat pump installation (up to €6,500) and solar water heating (€1,200). Standard gas combi replacements do not qualify directly. Work must be carried out by an SEAI-registered contractor before any grant can be claimed.
See SEAI-registered plumbers →Hiring
How to Find a Registered Boiler Installer in Ireland
Every gas boiler installer in Ireland must be registered with the RGII. Here is how to verify and hire correctly.
Browse Registered Gas Installers in Your County
Every engineer listed in our RGI gas installer directory is RGII-registered. Browse by county, find engineers near you, and contact them directly. You can verify any registration number at rgii.ie for additional peace of mind.
Get Three Written Quotes for the Work
Quotes should specify the boiler model, labour cost, flue materials and any pipework changes required. A quote without a named boiler model is incomplete, since the specification affects warranty terms, SEAI grant eligibility and long-term running costs.
Confirm SEAI Registration if Claiming a Grant
RGII and SEAI are two separate registers. RGII registration is mandatory for all gas work in Ireland, while SEAI registration is required only for grant-eligible jobs. Your installer must be on both lists before any SEAI-funded work begins.
Request Your Gas Safety Certificate on Completion
Your installer must provide a gas safety certificate on the day the work is completed. Keep it with your home insurance documents and BER certificate, because without it the gas work is unverifiable and will affect your property’s resale.
Boiler Installation Questions From Irish Homeowners
How much does combi boiler installation cost in Ireland in 2026?
A combi boiler supply and fit costs €2,200 to €3,200 in 2026 for a like-for-like replacement. Switching from a back boiler adds €400 to €800 for pipework changes. These figures include labour and VAT at 9%.
Do I need an RGII engineer for boiler installation in Ireland?
Yes. All gas boiler installation in Ireland requires an RGII-registered engineer by law. An unregistered installer cannot certify the work, your home insurance may be invalidated, and the installation will not be accepted for a BER certificate.
How long does boiler installation take in Ireland?
A like-for-like combi boiler replacement takes one working day. Switching boiler type takes two days. Heat pump installations take two to three days and may require additional work on your heating system and radiators.
Can I get an SEAI grant for a new boiler in Ireland in 2026?
SEAI grants are available for heat pump installation (€6,500) and solar water heating (€1,200). Standard gas combi replacements do not qualify for a direct SEAI grant, but insulation upgrades carried out at the same time may qualify separately.
What is the best combi boiler for an Irish home in 2026?
It depends on home size and hot water demand. For most homes under 130 square metres, a well-specified A-rated combi from a major manufacturer is the right choice, and your engineer should name the exact model and output size in the quote.
How much does an annual boiler service cost in Ireland?
Annual boiler service costs €80 to €120 in Ireland in 2026. Servicing every 12 months is required by most boiler manufacturers to maintain the warranty and ensures the boiler meets gas safety requirements.
Find a Registered Boiler Installer Near You
Boiler installation quotes from RGII-registered gas engineers in every county. Contact them directly, no fees, no sign-up.