i would assume so. Atleast in my experience (in a northern european country with many 120> old houses) almost no houses are strictly "up to modern standards" in

i would assume so. Atleast in my experience (in a northern european country with many 120> old houses) almost no houses are strictly "up to modern standards" in terms of building regulations. Usually it is something minor or energy inefficient. Using single pane windows for instance. Most dangerous regulations are taken quite seriously however, Electrics are usually old(80's and later) but not ancient(pre-ww2 - reconstruction). Water and gas supply is usually in good order because of the strict laws regarding those regulations.