New Boiler Cost Northern Ireland

New Boiler Cost Northern Ireland 2026 | JobDoneNI

New Boiler Cost Northern Ireland: 2026 Guide

⚠️ 2026 UPDATE: The Boiler Replacement Scheme is CLOSED.

Instant NI Installation Estimate

New boiler prices in Northern Ireland can vary based on fuel type, property size, system condition, and the level of pipework or flue work required. Use the tool below for a quick guide price.

Average New Boiler Cost in Northern Ireland

The table below shows typical price ranges for the most common boiler installation jobs we carry out across Northern Ireland.

Boiler job type Typical NI cost range
Gas combi boiler replacement £2,000 – £2,800
Larger gas combi replacement £2,500 – £3,200
Oil boiler replacement £2,800 – £3,800
Oil to gas conversion £3,400 – £4,500
Complex installation or boiler move £4,500 – £6,000+

These figures are estimates only and are intended as a general guide to new boiler prices in Northern Ireland. Final pricing depends on the boiler type (gas, oil, combi, system, or regular), the make and model selected, the condition of your existing pipework and flue, and the level of system cleaning required. Costs can also vary slightly between areas. Installations in Belfast, Lisburn, Antrim, Newry, Newtownabbey, Bangor, Derry/Londonderry, and Ballymena may differ depending on access, water hardness, and whether the property is on the mains gas network. For an accurate figure tailored to your property, please request a site survey.

Are there boiler grants available in Northern Ireland for 2026?

The Boiler Replacement Scheme is officially closed. The main scheme still active for eligible households is the Affordable Warmth Scheme, which is means-tested and aimed at households on lower incomes. If your household income is under £23,000, you may be eligible for support of up to £7,500 towards heating improvements.

During your site survey, Mark can discuss whether any current schemes may apply to your situation and point you in the right direction. Eligibility criteria and available funding change regularly, so it is always worth asking.

Technical Considerations for NI Homes

New boiler prices in Northern Ireland are shaped by more than just the unit itself. Local water hardness, fuel network availability, and the age of your existing pipework all play a role in the final installation cost.

Hard Water in Belfast and Lisburn

Belfast and Lisburn sit in one of Northern Ireland’s harder water areas. We recommend a magnetic filter and scale inhibitor as standard on every installation in this area to protect the heat exchanger from limescale build-up.

Gas or Oil: Which Is Right for Your Property?

If your street has a mains gas connection via Phoenix Natural Gas, firmus energy, or SGN Natural Gas, a gas combi is almost always the more cost-effective long-term choice. For properties off the gas grid, a modern condensing oil boiler is still a solid, efficient option. We can advise on both during a survey.

Local Service Areas and Postcodes

Area Postcodes Local Expertise
Greater Belfast BT1 to BT17, BT29 Inner-city terrace upgrades and combi swaps.
Lisburn and Castlereagh BT27, BT28 System-to-combi conversions and hard water protection.
Ards and North Down BT18 to BT23 Gas installs in North Down, oil replacements on the Ards Peninsula.
Antrim and Newtownabbey BT36, BT37, BT41 M2 corridor combi installations and upgrades.
Newry, Mourne and Down BT34, BT35, BT30 firmus gas installs in Newry, oil replacements across rural Down.
Derry/Londonderry BT47, BT48 SGN network gas installs and oil replacements across the north west.
Mid and East Antrim BT38, BT40, BT42, BT43 firmus gas on the coast, oil boiler replacements across rural Mid Antrim.

New Boiler Cost NI: FAQs

Boiler sizing depends on the number of bedrooms, bathrooms, and radiators in your property. As a rough guide, a one to two bedroom home typically suits a boiler in the 24 to 28kW range, a three bedroom home around 28 to 32kW, and larger properties with four or more bedrooms may need 32kW or above. That said, output requirements vary. A properly sized boiler installed to a well-flushed system will always outperform an oversized boiler on a dirty one. We carry out a full heat loss assessment as part of every site survey.
A well-installed and regularly serviced boiler should last between 10 and 15 years. In harder water areas like Belfast and Lisburn, boilers without proper system protection tend to fail earlier due to limescale and sludge build-up. Annual servicing and a good magnetic filter significantly extend working life.
Yes. Winter is actually one of the busiest times for boiler installations, particularly emergency replacements following breakdowns. A like-for-like combi swap can be completed in a single day, meaning your heating and hot water are restored the same day we start. We will always aim to minimise the time your home is without heat, regardless of the time of year.
A power flush is a deep clean of your central heating system using pressurised water and cleaning chemicals to remove sludge, rust, and debris from the pipework and radiators. It is more thorough than a standard chemical flush. Whether you need one depends on the condition of your existing system. If radiators have cold spots, the water runs dark when bled, or the system is particularly old, a power flush before installation is worth considering. We will assess your system during the survey and recommend the appropriate level of clean.
This depends on current fuel prices, which change regularly. Historically, mains gas has been cheaper to run than oil on a per-unit basis, though oil prices fluctuate and the gap narrows at times. If your property is connected to the mains gas network, gas is generally the more cost-effective and convenient option. For properties off the gas grid, a modern high-efficiency condensing oil boiler remains a practical and affordable heating solution. We can talk through the options for your specific property during a survey.
Not every boiler problem requires a full replacement. If your boiler is under ten years old and faults are minor, a service or repair may be all that is needed. However, if your boiler is frequently breaking down, struggling to maintain temperature, making unusual noises, or is significantly older than 10 to 12 years, replacement is often more cost effective than repeated repairs. Call Mark and describe what the boiler is doing. We will give you an honest assessment before recommending anything.

How It Works: The Job Done Process

1. Phone Consultation  |  2. Site Survey by Mark Gunda  |  3. One-Day Install

Call Mark: 07984 433834

Need something else? We offer more than just installations.

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