One of the lesser-talked-about parts of reducing or eliminating minimum parking standards in newer / revised zoning by-laws is that underground garages won't have to be excavated and historic buildings could, theoretically, be left undisturbed during construction. A good number of historic buildings have been removed or facadized simply because it's easier to shore and dig one large bathtub rather than trying to fit ones way around a house or small commercial building (even if the potential yield is only 1-3 spaces per level).