We are currently building in Linz am Rhein in Rhineland-Palatinate. We also informed ourselves beforehand and, like probably many others, went to the [Fertighauswelt]. That was 1 ½ years ago. After some offers from these providers and careful consideration, we have now decided on a local developer who is building on our plot. The plot cost us about €63K including additional purchase costs (about 520 sqm). Our house amounts to about €240K. It is a 1.5-story single-family house without a basement with about 155 sqm of living space, an air-to-water heat pump, and energy efficiency according to the Energy Saving Ordinance 2016. In addition, we have negotiated a solid garage, a terrace, various paving works, and some other nice features. What I want to say with this: Please make sure to get information in advance and compare offers. Unfortunately, I cannot say anything reliable about Bavaria, but I think there is also a wide price range there. In my opinion, prefabricated house providers are often more expensive than local general contractors or building contractors. You can also save on land prices if you are willing to forego a central location. The only important thing is that, in the end, you feel comfortable and collapse on the couch at home after work, put your hand in your pocket (Al Bundy says hello), and let out a sigh of relief.