In addition, there are your other positions, I think site setup with scaffolding 10000 more, earthworks I would also add 5000. Then plaster inside and outside 25000, screed 10000, windows with sills 30000, roof with frame and garage 30000, sanitary 30000, electrical 15000, then exterior painting and insulation and all incidental building costs are still missing, as well as painting and floors and kitchen and furniture... (Our values are similar, building similarly large and also with double garage)