It depends on what you want. Generally, anything but a prefabricated house. For what they deliver, all are far too expensive. €350,000 is the cheapest offer house from Schwörerhaus. We first wanted a city villa but then came to the realization that bungalows are much better thought out. Please do not go with a small construction company; such companies go bankrupt quickly. Also, do not pay money in advance but only after the construction phase has actually been fully completed. My recommendation is Town & Country or better Heinz von Heiden. Both providers offer solid 36cm Ytong masonry. Better than 17cm bricks and lots of external thermal insulation composite systems in the form of styrofoam on top. Both act as general contractors and are your contacts for all trades. Both are very affordable at least as long as the purchase contract is not signed and the 4-week withdrawal period has not expired. My advice therefore is to plan everything completely before signing; any changes afterwards are very expensive. Also, the ground often hides unexpectedly expensive surprises. It is better to do the soil analysis before buying the house and even better before buying the plot. Furthermore, construction takes a long time. A very long time. About 2 years should be expected. At least 6 months alone lasts the building permit process at the building authority. Plenty of time to save more money. We decided on Heinz von Heiden because they offer a fixed price for their houses without any ifs or buts. Town & Country only offers the fixed price guarantee for 1 year and after that, a reasonable price increase is to be expected, since 1 year is never enough for construction.