§ 131.0456

In all RM zones, premises with more than four dwelling units shall include common open space as follows: (a) The common open space area shall be at least 300 square feet, or 25 square feet per dwelling unit, whichever is greater. (b) At least one area of common open space shall be provided with minimum dimensions of 12 feet by 15 feet. This space shall be improved as a usable area with lawn or recreational facilities. (c) Roofed structures may occupy a maximum of 50 percent of the common open space area. No enclosed buildings are permitted in the common open space area. (d) Common open space may be provided in the required side and rear yards. (e) Common open space shall be landscaped or improved with outdoor recreational facilities available only to the residents and guests of the development.