When your boiler gives out, the biggest question isn’t just boiler replacement cost, the total price to swap an old, broken boiler with a new one, including unit and labor—it’s whether you’re being charged fairly. A combi boiler, a type of boiler that heats water on demand and doesn’t need a separate tank might cost £2,000 to £3,500 installed, while a system boiler could run £2,500 to £4,000. The price isn’t just about the machine—it’s tied to how complex the job is, where you live, and who’s doing the work. In Bognor Regis and across the UK, prices vary because some engineers include extra fees for flue extensions, system flushes, or thermostat upgrades you didn’t ask for.
Don’t assume a higher quote means better service. Many homeowners pay more because they don’t know what’s standard. A gas safe engineer, a certified professional legally allowed to work on gas appliances in the UK must be used by law—and that’s non-negotiable. But you can still compare. Some companies bundle in a free year’s warranty, others charge extra for it. The average installation takes one day, but if your old pipes are rusted or your flue needs rerouting, the cost jumps. That’s why quotes differ so much. One engineer might say £2,800 because they’re replacing a direct swap. Another says £3,600 because they’re upgrading your system to work better with modern controls. Neither is wrong, but you need to know why.
What’s often left out of the conversation is timing. If your boiler is over 10 years old, repair costs add up fast. A £500 fix today might mean a £2,000 repair next winter. Replacing it now can save you money in the long run—especially with newer models using 30% less gas. You also might qualify for a government grant or local council scheme that cuts the price by hundreds. Don’t skip asking about it. And if your hot water suddenly stops, or your boiler keeps cutting out, that’s not just an inconvenience—it’s a warning sign your replacement cost is coming sooner than you think.
Below, you’ll find real guides from people who’ve been there: what they paid, what went wrong, and how they avoided getting ripped off. No fluff. Just what works in the UK right now.
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