Abandon geothermal energy use?

Hello,

we would like to heat our new house (in Germany) using geothermal energy. Problem: According to information from the responsible state office for geology, our property is located in an area of level 4. Geothermal energy use is only permit-worthy there in exceptional cases. Furthermore, our soil is less suitable for geothermal collectors according to the map (level 3). To me, the soil seems very heavy and clayey. Under these circumstances, should I better give up the project "geothermal energy use"? Or is it worth negotiating with the responsible authorities and possibly investing more money in the installation of the collectors?

Moist, clayey soil has a relatively high withdrawal capacity; the required collector area to cover the calculated heating load would thankfully be smaller than, for example, with sandy dry soil. Please inquire in writing with the [Landesamt für Geologie] under which exceptional conditions geothermal energy use would be approved - asking costs nothing.

I would also first ask, maybe you will realize that you won't get an exception permit anyway, then it's settled. And if not, you can still decide.

I would give up on this project. Why negotiate with the office and spend money if it does not bring anything? Better to look for alternatives and invest there.

So spending money for nothing, I wouldn’t do that either, and if the local conditions do not allow it to be used, then that cannot be changed. There are certainly other alternatives.

Or consult a specialist. I sometimes think negotiations can help, and if it’s worth it in the end, why not? But that cannot be assessed from a distance.