Working together to deliver sustainable heat in the Oude Rijn area

The energy transition is ongoing. We are working in close collaboration with the municipalities and other stakeholders to include geothermal energy as one of the solutions in this energy transition.

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Leiden aardwarmte

There is sufficient subsurface data available in this area to allow the production of geothermal heat in a safe and sustainable manner. We are now assessing whether this heat can be produced reliable and affordable.

Project summary


Geothermal energy system connected to a local or regional district heating network

Current phase

Feasibility phase. We know geothermal heat production is possible and we are now studying the economic feasibility.

Expected realisation

We expect to start producing sustainable heat in 2025/2026

Of interest to?

Companies, homes and utility buildings

Project name

Oude Rijn

Which area does it concern?

It concerns an area in the region of Leiden. The license area is named ‘Oude Rijn’. The area covers, among other, the municipalities of Wassenaar, Katwijk, Voorschoten, Leiden, Leiderdorp and Zoeterwoude.

We already know a lot about the subsurface in this area, from decades of searching for and producing oil and gas. As a result, we know that there is a lot of hot water available.

In addition to the production of geothermal energy, we are also investigating the supply of heat using district heat networks.

oude rijn

The 'Oude Rijn' research area (both sub-areas in blue) is located around Leiden (province of South Holland).

Zoeterwoude Westbroekpolder

What are the benefits?

  • Sustainable, clean and renewable energy.
  • Local energy: energy independence from other countries.
  • Minimal footprint: geothermal installations require a small surface area.
  • Affordable energy: it will not cost more than natural gas and likely less.
  • Stable and predictable energy: independent of wind or sun, day or night. The production and costs are stable and predictable.

Interesting for?

This project is of interest to anyone who wants to receive clean, sustainable and affordable heat.

This includes the built environment (residential, offices) but also greenhouses and light industry.

aardwarmte en warmtenetten in regio

Do you have a question on this project?

Please feel free to contact us. Our team is ready to assist you.

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