Geothermal heat pump price in Belgium in 2026
The geothermal heat pump offers the most stable COP of all technologies — even in the depths of winter. The entry cost is higher, but grants and long-term savings more than make up for it. Here are the real 2026 ranges by type of ground loop.
Indicative ranges, supply + drilling + installation. Grants not deducted.
Geothermal heat pump price by ground-loop type and power
Ranges for a ground-water heat pump supplied and installed, borehole or collectors, hydraulic and electrical connection included. Excludes the drilling permit and works to adapt the existing heating network.
| Ground-loop type | Low power 6 kW · compact house | Medium power 10 kW · 3–4-sided house | High power 14 kW+ · large house |
|---|---|---|---|
| Horizontal collectorsLarge plot required | 15 000– 17 000 € | 17 000– 19 000 € | 19 000– 20 000 € |
| Single-probe boreholeThe most common solution | 20 000– 23 000 € | 23 000– 26 000 € | 26 000– 28 000 € |
| Double-probe boreholeHigh power or poor ground | 25 000– 28 000 € | 28 000– 32 000 € | 32 000– 35 000 € |
Indicative prices incl. VAT, supply, drilling and installation included, grants not deducted. The exact sizing is established during the free quote. General page: prices of all heat pumps.
What makes the price of your geothermal heat pump vary
For the same power, a borehole in clay soil and a borehole in massive rock do not cost the same. Here are the six line items that really weigh on the geothermal budget.
- Type of ground loop
Horizontal collectors (land required, shallower) or vertical borehole (80–150 m probe): this is the first cost factor. Collectors are cheaper to lay but require a large available surface.
- Drilling depth
Each metre drilled costs between 30 and 50 € depending on the equipment used and the nature of the ground. A 100 m probe represents 3 000 to 5 000 € of drilling alone.
- Nature of the ground
Moist clay soil conducts heat better than dry gravelly soil: it allows shallower probes. A preliminary geothermal study (100–300 €) can avoid costly oversizing.
- Power and buffer tank
The power (kW) is sized on the heat losses of the home. A buffer tank of 200 to 300 L (1 000– 2 500 €) improves comfort and the lifespan of the heat pump.
- Authorisations and permits
In Belgium, a geothermal borehole requires a declaration or a permit depending on the region and the depth. Administrative fees range from 200 to 800 € depending on the municipality.
Geothermal heat pump — complete guide → - Electrical connection
A geothermal heat pump of 10 kW or more often requires a three-phase meter and a dedicated sub-panel. This item can represent an additional 600 to 1 200 €.
The grants that lower your geothermal heat pump
Geothermal benefits from the highest grants among all heat pump technologies — up to 6 000 € in Wallonia. Here are the 2026 benchmarks and the conditions to meet.
Prime Habitation
When replacing fossil-fuel heating, the Walloon geothermal grant reaches 6 000 € for middle-income households, scaled upward according to income.
- Replacement of a fossil-fuel generator (oil, gas, coal)
- Ground-water heat pump with COP ≥ 4.0 (A++ label or higher)
- Borehole carried out by an approved driller and declared to the region
Renolution grants
Support for installing a high-performance heat pump, geothermal included, with three income categories and a bonus for very energy-hungry homes.
- Ground-water heat pump for central heating
- Home over 10 years old
- Certified installer and itemised invoice
Get your price net of grants, in 48 h
We check your entitlements, cost it net of grant and build the file: you advance nothing.
- We check your entitlements
Region, income, current heating type: we identify the grants you can claim for geothermal.
- We carry out the feasibility study
Nature of the ground, available surface, required power: we determine the suitable type of ground loop.
- We build the file
Drilling declaration, grant forms, technical certificates: we handle everything.
- We deduct where possible
The grant is subtracted from your bill, with no cash advance on your side.
Are you in Flanders? The Mijn VerbouwPremie also covers geothermal heat pumps — ask us for the details for your municipality.
A range in 10 seconds
Choose your type of ground loop for a ballpark figure. The free quote remains the only accurate estimate.
Indicative estimate, excluding the drilling permit and adaptation of the heating network.
What a real geothermal quote looks like
A concrete case to make the ranges meaningful — your project will be costed based on your needs and the nature of your land.
Indicative example dated 2026, excluding the drilling declaration and network adaptation. Request your quote for pricing tailored to your home.
Dig deeper before deciding
- Geothermal heat pump guide The whole silo
Ground-water and water-water technologies, COP, sizing and maintenance: the complete pillar page.
See the complete guide → - All heat pump prices Comparison
Air-to-air, air-to-water and geothermal side by side: 2026 ranges and subsidies brought together.
Compare the technologies → - Heat pump grants Wallonia Regional subsidies
The breakdown of grants in Wallonia, Brussels and Flanders to finance your geothermal project.
Explore the subsidies →
Your questions about the price of a geothermal heat pump
How much does a geothermal heat pump cost in 2026?
In Belgium, expect between 15 000 and 20 000 € for a ground-water heat pump with horizontal collectors, and between 20 000 and 28 000 € for a single-probe vertical borehole. All included (supply, drilling and installation), grants not deducted.
Is the borehole included in the price?
Yes, in our ranges the borehole is included. It generally represents 3 000 to 5 000 € for an 80 to 120 m probe, carried out by a specialist approved driller. The quote details every item so there are no surprises.
Do horizontal collectors cost less than the borehole?
Yes, horizontal collectors (15 000– 20 000 €) are cheaper than a vertical borehole (20 000– 28 000 €) because they require less deep work. In return, they require a large available plot of land (300 to 500 m² depending on the power).
What grants are there for a geothermal heat pump in Wallonia?
In Wallonia, the Prime Habitation can reach 6 000 € for a geothermal heat pump replacing fossil-fuel heating — it is the highest heat pump grant. The amount is scaled according to income and the technical conditions of the installation.
Is a drilling permit mandatory?
Yes, a geothermal borehole is subject to a declaration or an authorisation depending on the region and the depth. In Wallonia, a borehole deeper than 10 m requires a works declaration. We handle this process and coordinate the approved driller.
What is the lifespan of a geothermal heat pump?
The heat pump itself has a lifespan of 20 to 25 years. The geothermal probes in the ground are designed for 50 years or more. It is the heat pump technology with the best long-term return on investment, notably thanks to a stable COP of 4 to 5 all year round.
Your exact geothermal price, costed and net of grants
The ranges give the ballpark — the quote gives the figure. Feasibility study, sizing, grants calculated, drilling file build: a single point of contact. In under a minute.
- Free and no obligation
- Grants & 6% VAT calculated and deducted
- Costed quote within 48 working hours