We finished our complete renovation a few months ago. The structure was great (~ built in 1960 / ~150m²) and we did almost 2 years of DIY (complete electrical work, gutting, shell construction, painting, drywall, etc...) and worked without an architect. We have the luxury of many craftsmen and construction engineers in our circle of acquaintances. Our rough costs were:
Roof 32k
Windows + front door 9k
Venetian blinds (only one window front) 2k
Heating (3 floors underfloor heating) 16k
Water/sewage 7k
Interior plaster 15k
Electrical materials 3k
Painting materials 1k
Construction debris 4k
Natural stone 4k
Drying out (inside) 6k
Facing shell + perimeter insulation + external drainage 19k
Screed 3k
Drywall 5k
Interior doors 6k
Tiles 14k
Floor coverings 9k
Sanitary installation 9k
External stairs 3k
Balcony waterproofing 2k
Exterior plaster repairs 3k
Building materials 7k
Home network 2k
Exterior plaster + insulation of one side of the house 14k
All in all, including the kitchen, about 190k and over 2 years of DIY. We had also imagined it to be a bit cheaper, but are still satisfied. We would certainly do a few things differently now, but we are satisfied. Converting the basement into a living basement was probably not the smartest economic decision and ripping out all floors to install underfloor heating everywhere is the Pandora’s box in an old building with wooden beam ceilings :). Good luck with your project!
Phew, I’m glad I didn’t buy an old building. I would have severely underestimated the costs, we would have gone under because old junk properties already cost 600k-700k here. I roughly calculated it at 100k because I come from the construction industry, but I absolutely can’t do any of it myself :)