Geothermal Heat The Hague is connecting more than 4,000 homes and 20,000 m2 of office space up to geothermal heat. A great deal of the property is newly built and is being carried out by the three participating housing corporations. Some projects are already in full swing, a great deal are being developed further and one project has already been completed. Here you can find a summary of the projects that will soon be connected to geothermal heat.