Geothermal heating plant in Dugny-Le Bourget, France to start commissioning soon
Visitors at the educational bungalow of the Dugny-Le Bourget geothermal drilling operations in France (source: Groupe Coriance)
Carlo Cariaga
14 Jan 2026
With the drilling phase now completed, the commissioning of the geothermal heating plant at Dugny-Le Bourget in France will start by spring 2026.
With the drilling of the geothermal doublet now completed, the commissioning of the geothermal heating that will serve the towns of Dugny and Le Bourget in the department of Seine-Saint-Denis in France is scheduled to start by spring 2026.
Under Dugny-Le Bourget Green Energy (Energie verte de Dugny – Le Bourget / EVDB), a wholly owned subsidiary of Groupe Coriance, and Paris Terres D’envol, the geothermal heating project will supply the hot water and heating needs of more than 9000 equivalent dwellings in the Dugny-Le Bourget region. This will include the Paris-Le Bourget Airport as well as public buildings and industrial and business sites.
Once the geothermal heating system is in place, the connected facilities are expected to benefit from heating rates that are lower by 25% on average compared to gas. Energy bills will go down further due to reduced VAT rates. Moreover, maintenance costs of geothermal systems are expected to be lower than boilers.
The reduction in emissions due to the transition to geothermal heating is estimated at 15,600 tons of CO2 each year, or the equivalent of the emissions of 13,000 cars.
Construction of the heating plant started in October 2024, while drilling of the doublet followed soon after by July 2025, as ThinkGeoEnergy reported. The wells were drilled to depths of approximately 1700 meters, thus accessing the Dogger formation. The drilling phase was completed after three months.
Work is now ongoing to connect the wells to the heating plant. Meanwhile, the distribution network is being deployed across the service area. This will be composed of 20 kilometers of pipes and 93 substations installed at the connected facilities.
The first buildings expected to benefit from geothermal energy are those in the former media village in Dugny and at Le Bourget airport, which are already connected to the network. Other connections will be made progressively until 2030.
Source: Groupe Coriance and Solscope
