The purpose of this research is clarifying the actual condition of the slope ground apartment which is increasing in recent years. Its attention was paid to the Building Standard Law revision in 1994 and 1997 in investigation. The conclusions are as follows; 1) The slope ground apartment should be increasing rapidly with Building Standard Law revision. And the floor area ratio should also be increasing rapidly simultaneously. 2) Some types are seen according to the plan technique and a form in a slope ground apartment. 3) Although the Yokohama municipal ordinance is effective in a stood-straight type slope ground apartment, the regulation is not enough for a stairs type slope ground apartment.
