Posted on: 6 May 2026
If your boiler is becoming unreliable, expensive to run or struggling to keep your home warm, you may be wondering how much a replacement boiler actually costs in Northern Ireland in 2026.
The answer depends on several factors including:
- The size of your property
- The type of boiler you choose
- Whether you currently use oil or gas
- Additional controls or upgrades selected
- The complexity of the installation
In this guide, we’ll break down realistic boiler replacement costs in Northern Ireland, explain what affects pricing, and outline the support available to help local homeowners make the switch.
Average Boiler Replacement Cost in the UK
Across the UK, the average cost of a new boiler installation in 2026 is typically:
| Boiler Type | Average UK Cost |
| Combi Boiler | £2,000 – £4,500 |
| System Boiler | £2,300 – £5,000 |
| Oil Boiler | £3,000 – £6,000+ |
These costs can vary significantly depending on:
- Property size
- Existing pipework
- Flue requirements
- Controls and smart thermostats
- Hot water cylinder requirements
- Additional heating upgrades
Average Boiler Replacement Cost in Northern Ireland
In Northern Ireland, boiler installation costs can sometimes differ slightly from mainland UK pricing due to:
- Property styles
- Rural locations
- Oil heating prevalence
- Fuel conversion work
- Labour and supplier costs
At solv, our boiler installation prices currently range from approximately:
| Package Type | Approximate Cost Range |
| Boiler Replacement Packages | £2,000 – £5,000+ |
However, this depends on:
- Property size
- Boiler output required
- Fuel type
- Additional options selected
- Installation complexity
What Affects the Cost of a New Boiler?
- Property Size
A larger property will usually require:
- A higher-output boiler
- More radiators
- Greater heating demand
This naturally increases installation cost.
- Boiler Type
Combi Boilers
Combi boilers provide heating and hot water directly from the boiler without a cylinder.
Best suited for:
- Smaller to medium homes
- Homes with lower hot water demand
System Boilers
System boilers work alongside a hot water cylinder and are ideal for:
- Larger households
- Multiple bathrooms
- Higher hot water demand
Oil Boilers
Oil boilers remain common across Northern Ireland, particularly in rural areas without access to the gas network.
Oil installations can sometimes involve:
- Tank considerations
- Additional safety requirements
- Different servicing requirements
- Switching from Oil to Gas
If you are upgrading from oil to natural gas, additional works may be required including:
- Gas connection work
- Pipework changes
- Removal or decommissioning of old oil equipment
Because every property is different, customers moving from oil to gas will need to contact solv directly for a tailored quotation.
- Heating Controls & Add-Ons
Modern heating controls can improve:
- Energy efficiency
- Comfort
- Heating control
- Running costs
Additional upgrades may include:
- Smart thermostats
- Magnetic filters
- System flushing
- Additional radiators
- Thermostatic radiator valves
solv’s Boiler Installation Packages
At solv, we offer boiler installation packages designed to suit different homes and budgets.
Our packages are structured in:
- Silver
- Gold
- Platinum
Each package tier builds upon the previous one.
For example:
- Gold includes everything within Silver, plus additional features such as a programmable room thermostat.
- Platinum includes a complimentary first-year boiler service.
Because every home is different, our pricing varies depending on:
- Property size
- Boiler type
- Package selected
- Additional upgrades chosen
Get an Instant Rough Boiler Price Online
To make things easier for homeowners, solv offers an online boiler quotation tool called TrueQuote.
Using our online tool, you can receive a rough idea of boiler replacement pricing based on:
- Your property
- Your heating setup
- Your preferred package options
👉 Try our online boiler quote tool here!
Please note:
- The tool provides an estimated price guide
- Oil-to-gas upgrades require direct assessment and quotation
Phoenix Energy £600 Boiler Replacement Allowance (Until 30 June 2026)
Homeowners in eligible areas of Northern Ireland may currently benefit from a £600 cashback offer through Phoenix Energy.
The scheme is available until 30 June 2026 and is designed to help households switch from oil to natural gas.
Eligibility includes:
- Household income under £90,000
- Installation completed through a registered Phoenix installer
- Switching from oil or another eligible heating source to natural gas
solv is a registered installer for this scheme.
More information is available in other other blog post here.
Are New Boilers More Efficient?
Yes — modern A-rated boilers are significantly more efficient than many older systems.
Potential benefits include:
- Lower energy bills
- Improved reliability
- Better heating performance
- Reduced breakdown risk
- Improved heating controls
- Lower emissions
Older boilers can become increasingly expensive to run as efficiency declines over time.
Should You Repair or Replace Your Boiler?
In some cases, repairing a boiler still makes financial sense.
However, replacement may be worth considering if:
- Your boiler is over 10–15 years old
- Repairs are becoming frequent
- Parts are difficult to source
- Energy bills are increasing
- Your boiler struggles to heat the property properly
Frequently Asked Questions
How much does a boiler replacement cost in Northern Ireland?
Typical replacement costs in Northern Ireland can range from around £2,000 to £5,000+ depending on the property, boiler type and package selected.
How long does a boiler installation take?
Most straightforward boiler replacements can often be completed within 1–2 days, though more complex upgrades may take longer.
Is it worth upgrading from oil to gas?
For many households, switching from oil to gas can offer:
- Greater convenience
- Improved efficiency
- Reduced maintenance
- No need for oil tank refills
However, suitability depends on the property and gas network availability.
Can I get a rough boiler quote online?
Yes — solv’s quotation tool on our website can provide a rough estimate for a replacement boiler online. Try it here!
Oil-to-gas upgrades require direct assessment.
Need Advice on a Boiler Replacement?
Whether you’re considering replacing an ageing boiler, upgrading your heating controls or switching from oil to gas, solv can help.
Our team installs boilers across Northern Ireland and can help guide you through the options available for your property and budget. Visit our dedicated boiler installation page here.