In my city all new apartment buildings (here that's 5-7 floors) have underground parking with at least 1 parking space for every unit. I'm not sure if that's by

In my city all new apartment buildings (here that's 5-7 floors) have underground parking with at least 1 parking space for every unit. I'm not sure if that's by law, but it makes good sense. The parking spaces cost an extra €20,000 on top of the apartment price, so it makes good business sense for the developer to do this too :-) Opposite me (literally 10m from my window, across the street) there is a new development being built that used to be a dirt patch of private parking for an office. It's going to be a mixture of office, retail and residential units. For the past year it's been fun to watch them digging out the plot - around the size of a medium supermarket - to 20m or so below ground level, which will be used for parking.