having renovated and completed a shell stage new build, and various other older properties, I would add that it depends on the materials......and how far you want to go.
reroofing a moderate sized roof ball park 3000 lev labour and access
bathroom labour ball park 1000 lv.
double glazed ....all depends obviously on how many doors/wndows, pvc or wood.
concrete floor .......just had one done a few weeks ago really cheap think it was around 300 lv including everything.....so 3 rooms 900lv
electrics probably 1000-1500 lv all included.
If you click on my gallery the modern house which is 3 bed from shell stage to a high quality interior incl major layout redesign,reroofing with felt and batten eaves and guttering, central heating and new chimney, insulation exterior and underfloor, oak flooring , double glazed throughout, 2 bathrooms, spiral staircase, dry lined througout, all electrics and plumbing,exterior decking,internal doors, kitchen ........cost me around 20 k English pounds which i was quite pleased with.