We also built cheaply. The house was offered for 148,250. Catalog price. Kfw70 package, controlled residential ventilation, chimney, gray windows, underfloor heating, one skylight were added on top. At the bottom right it then said 182,000. By the building permit, through structural analysis and more miscellaneous stuff, we reached 195,000. With finished garage at 205,000. The special equipment tiles, sanitary and electrical made the package about 20,000 more expensive. Without KNX, without technical frills. Painted and the remaining floors also came on top in EL. Outdoor facilities around 12,000. Materials including platform and natural stone about 4,000. Plants 3,000. Simple aluminum carport almost 4,000 or so. Incidental construction costs we were very cheap with about 20,000. In total we eventually stopped adding up ...