Boiler Replacement Costin the Netherlands: 2026 Prices

The first three rows below are reference prices excluding VAT for a like-for-like replacement on the same spot. Amounts exclude VAT. Whether VAT is added depends on the contractor: one using the small-business scheme (KOR) charges none. The rows underneath have no reference range: they are quoted per project, and the amounts shown are what installers publish as add-on prices, not a price you can hold anyone to.

Hot-water class drives most of the appliance price. A CW4 boiler suits a home with one bathroom and a normal shower. CW5 and CW6 deliver more hot water at once, for a rain shower or two bathrooms in use together, and Dutch consumer guides put those at roughly €2,100 to €2,800 supplied and installed. Consumer prices published by national installers already have VAT added, so they are not directly comparable with the ranges above.

For context on the completed-job figure: the homeowners' association Vereniging Eigen Huis and Milieu Centraal both put an average like-for-like replacement around €2,100 with installation, which sits in the upper half of the €1,600 to €2,600 band.

The €1,600 to €2,600 range assumes a one-for-one swap: the new boiler goes back where the old one hung, onto connections that already exist. Anything that breaks that assumption is a second piece of work, quoted per project rather than taken from a range.

Coming from an old open-flued water heater (a geiser) or a non-condensing VR boiler is a bigger change again: an HR appliance condenses and draws its combustion air from outside, so the flue and air supply usually have to be adapted too. Have those items named at the survey.

Not automatically, and this is the single most common misunderstanding in Dutch boiler quotes. The flue is the rookgasafvoer on your paperwork, and the air-supply duct that runs beside or around it is the luchttoevoer. There is no rule that a new boiler forces a new flue. What is required is that the certified installer assesses the existing flue and air-supply system and confirms it is suitable for the specific appliance being fitted — and that they may not commission an installation that does not comply. If the existing flue does comply, it stays.

The flue gets replaced when the assessment fails, and there are only a handful of reasons why it would:

So ask for the assessment result before you accept a flue line on a quote. "A new boiler always needs a new flue" is not a rule; "this flue is not approved for this boiler, here is why" is a reason. Where a replacement genuinely is needed, national installers publish add-on prices in the region of €185 to €190, but the real number depends on the route, the roof and the length.

Three items sit just outside most basic replacement prices, and each is far cheaper while the system is drained and the boiler is off the wall.

Whether your existing thermostat carries over is one of the most commonly forgotten lines on a boiler quote, and one of the easiest to settle in advance. Give the make and model when you request the price.

If a new thermostat is needed it is the appliance plus roughly half an hour of work, and it belongs on the quote as its own line rather than appearing as extra work on the day. Where the wiring to the hallway will not carry the control you want, a wireless model with a receiver at the boiler is the usual way around it. A modulating control only repays the difference if the rest of the system can run cooler.

Since 1 April 2023 this is not a matter of preference. Under the Dutch Gasketelwet, only a company holding the carbon-monoxide certificate may install, convert, repair or service a gas-fired appliance. In practice you will see it advertised as CO-vrij or as a CO-gecertificeerd bedrijf. A handyman, a general plumber without the certificate, or a neighbour with tools may not legally do the work, however competent they are.

This matters to you for three practical reasons, beyond the law itself:

No. The obligation that was announced for 2026 — that a boiler being replaced would have to be swapped for a hybrid heat pump — was withdrawn before it took effect. You may replace an HR boiler with an HR boiler. If someone tells you that a straight boiler swap is no longer allowed, that is out of date.

A hybrid heat pump remains a genuine option, not a requirement. The financial picture is different in one important way: the Dutch ISDE subsidy applies to (hybrid) heat pumps and to insulation measures. There is no subsidy for a gas boiler, however efficient it is. If you are weighing the two, ask for both quotes at once and compare the net cost after subsidy, not the list prices.

One practical note for anyone renting or in a VvE apartment: a switch of heating system is usually not a decision an occupier can make alone, whereas a like-for-like boiler replacement normally is.

A Dutch cv-ketel lasts roughly fifteen to eighteen years. The decision point is usually a specific expensive part — a heat exchanger, a fan, a gas block — on an appliance that is already past twelve.

Renting a boiler (a huurketel) is a third route, common in the Netherlands and rare elsewhere. You pay a monthly amount, maintenance and breakdowns are covered and there is no capital outlay. Over the life of the appliance it generally costs more than buying; what it buys is predictability. Read the term, the notice period and what happens if you sell the house before you sign, because that is where the cost sits.

If you are a tenant, replacing a failed boiler is normally the landlord's responsibility, not yours. Report it and follow the landlord's procedure rather than commissioning the work yourself and hoping to be reimbursed.

A straightforward like-for-like swap in the same position takes about four to six hours for one or two engineers. You are without heating and hot water for that window, not for days. A relocation, a new flue route or a system that has to be flushed will run longer, and the installer should tell you that in advance rather than on the day.

Two things to arrange before the day: clear access to the boiler cupboard and to the roof terminal if it needs work, and somewhere for the old appliance to go if disposal is not in the price.

Send every installer the same information and you get quotes you can actually compare: the make, model and age of the current boiler, photos of the appliance, its data plate and where the flue leaves the building, the make of your thermostat, whether it is a house or an apartment, and how many showers are ever in use at once.

Then check that each quote answers all of this in writing:

Compare coverage before you compare totals. The cheapest quote stops being cheapest once a flue, a thermostat and disposal of the old appliance are added afterwards. Ask as well who will be on site and whether that engineer holds the personal certificate. For the wider picture, see the Plumber Cost Guide.