Unfortunately, the municipality has not yet responded regarding the building application. The weather is currently not the best, but I am considering maybe starting to dig a little where the foundation is supposed to go and remove old roots. My only concern is whether the slope might then slip or, even worse, if the foundation of the house might encounter problems. I am currently looking for a capable mason who could carry this through with me. So if anyone knows someone from the Aschaffenburg or Main Spessart district.... After your concerns, I have given up on wood for now, also for cost reasons. I have looked at Ytong, Silka, Poroton, and also "Lego" systems, and at the moment I am unsure whether to choose Ytong or Poroton bricks. What, in your opinion, are the pros and cons of each system? Ytong apparently offers something for self-builders, including instruction, but I think the project is too small for that. So many questions....