New Boiler Cost Guide
Understand what really drives the cost of a new boiler, and get a personalised estimate by entering your own quote details, boiler type, and installation complexity.
Estimate Your Boiler Cost
Boiler prices vary enormously by brand, output, and property, so rather than guess a figure for you, enter your own quote details below and the calculator will build the full total.
Boiler Cost Solver
Build your total installation cost from your own quote figures
Boiler Cost Quick Facts
What actually moves the price of a new boiler
What Builds the Final Price
A boiler quote is rarely one number. Here’s how installers typically arrive at a total.
Choose the Boiler Type and Output
Combi, system, and regular boilers suit different homes and hot water demands, and higher-output models for larger properties typically cost more upfront.
Assess the Installation Complexity
A straight swap in the same spot is the simplest job. Moving the boiler, changing pipework routes, or converting boiler type all add engineer time.
Factor in Labour and Duration
Labour is usually priced per day and scales with how many days the job realistically takes, which depends on access, existing pipework, and any unexpected issues found on site.
Add Extras and Compliance Work
Flue upgrades, filters, thermostats, a chemical flush, Building Regulations notification, and commissioning paperwork are often priced separately from the core installation.
Ways to Manage the Cost
A few habits can help you get a fair price without cutting corners on safety or quality.
Compare Like-for-Like Quotes
Ask each installer to itemise the boiler unit, labour, and extras separately, so you’re comparing the same scope of work rather than just a bottom-line figure.
Check the Engineer Is Gas Safe Registered
This is a legal requirement for any gas boiler work in the UK. Ask to see a Gas Safe ID card and confirm they’re registered for the specific job before booking.
Consider Timing
Booking outside the coldest months, when demand for emergency callouts is lower, can sometimes make it easier to get competitive quotes and a convenient install date.
Look at the Whole-System Option
If you’re not committed to a like-for-like gas boiler, it’s worth comparing the cost of a heat pump against available government grant funding before deciding.
Boiler Cost FAQ
Answers to the most frequently asked questions about new boiler installation costs in the UK.
The boiler type and brand set a baseline, but complexity usually drives the biggest swings in price. A like-for-like swap in the same spot is the cheapest option. Moving the boiler to a new location, converting from a regular boiler to a combi, or upgrading pipework, flue routing, or the gas supply all add labour time and materials.
Yes. By law, any work on a gas boiler in the UK, including installation, servicing, and repair, must be carried out by an engineer on the Gas Safe Register. Always ask to see a Gas Safe ID card and check the engineer is registered for the specific type of work before booking.
Standard gas boiler replacements are not covered by the government’s Boiler Upgrade Scheme, since that grant is aimed at moving households away from fossil fuel heating. If you’re open to switching to a heat pump instead of a like-for-like gas boiler, the scheme currently offers a grant toward the cost, so it’s worth comparing both routes before deciding.
A straightforward like-for-like swap can often be completed in a single day. More involved jobs, such as relocating the boiler, converting boiler type, or fitting a new flue run, commonly take one to three days depending on the property and what needs to change.