Replacing your boiler: costs and choices in 2026

Replacing a boiler costs, including the unit, usually € 1,800 to € 3,500. The unit itself is € 1,200 to € 2,200 depending on output and brand; installation, balancing and disposal of the old boiler come on top. If the flue or gas line needs adjusting, the price rises.

Replacement usually pays off from around fifteen years. From that age breakdowns and parts costs rise, and a modern high-efficiency boiler is more economical: the efficiency gap with an old boiler shows noticeably on the gas bill. An engineer honestly weighs the remaining life of your current boiler — nobody earns anything on a ten-euro repair, but an expensive part replacement on an 18-year-old boiler is rarely wise.

The bigger choice is a high-efficiency boiler or a hybrid heat pump. A hybrid connects to the boiler you already have and suits homes with moderate insulation; a fully electric heat pump becomes the obvious choice once your home is reasonably to well insulated and has low-temperature emitters such as underfloor heating or generously sized radiators. A subsidy is available for hybrid heat pumps — ask the engineer about the current scheme and its conditions.

Always request multiple quotes and check exactly what's included: unit, installation, balancing, disposal and warranty. For the very same boiler, total prices vary considerably between companies; set a quote against the price index before you agree to it.