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Page Three THE ZONING REPORT (b). For lots in manufactured home subdivisions; platted as conventional subdivisions, the street zone yard typically is 10-25 ft to front lot lines and 5-15 ft to street side tot lines. Interior side yards are 5-10 ft with 5-8 ft most common, and rear yards are 15-25 ft, with 15 ft most common, with a maximum 40% lot coverage by buildings and 50-60% impervious surface ratio. Special subdivision designs may have smaller zone yards and greater lot cov- erage or the yards and coverage can be modified for manufactured home subdivisions on a case basis. Zone yards for accessory structures are 3-5 ft for interior side yards, 7-15 ft for street side yards, ~nd 5-15 ft for rear yards. E. Minimum size of mobile home space, manufactured home lot and maximum gross density on the mobile home park/manufactured home subdivision tract. The size of spaces and lots in projects re- lates to the maximum gross density of living units allowed, excluding one-half of the ROW width of adjoining perimeter streets. Maximum gross density typically ranges from 8-10 living units per acre. At this density, the minimum allowable net area of mobile home spaces ranges from 1500- 7000 sq ft, with most codes allowing 3500-5000 sq ft, with 3500 sq ft most common. For manufac- tured home lots, it ranges from 2500-10,000 sq ft, with most codes allowing 5000-7000 sq ft per lot, with 5000 sq ft most common. For parks, PUDs and plats allowing variably-sized lots based on an average lot area, many codes require an average area of space of 3500 sq ft for mobile spaces and 5000 sq ft for subdivision lots, but allow within this average, a minimum lot area of 3000 sq ft for spaces and 3500 sq ft for lots for up to 10-25% of the living units in the project. Many codes impose no minimum area of space or lot, the ~rea being subject only to maximum allowed gross tract density and minimum required clearances, zone yards and buffer yards. 6. SITE DEVELOPMENT STANDARDS A. Open space required. (a). Common open space required. Mobile home parks, as planned projects similar to a PUD, and manufactured home subdivisions, as required by the subdivision code, must provide a percentage of the gross area of tract in common open space. It excludes portions of the site designated for mobile home spaces and the premises for administrative offices, single family dwellings for caretakers, service buildings, storage areas, platted areas and streets. The percentage of common open space required typically is 5-8% of the gross area of the tract, perhaps higher for PUDs, up to 10-15.% of tract area. Some codes require common open space be calculated as a minimum number of sq ft per living unit in the project, 150- 300 sq ft per unit. This open space is shown in survey detail on the final development plan and final plat. For mobile home parks, it is owned, operated and maintained by the owner and operator and in subdivisions by the homeowners association unless the locality requires some or ail of it dedicated as public parks. The design and layout of common open space is for the use of tenants, occupants and their guests, distributed throughout the project, re- lated to the pedestrian and vehicular circulation system and the location of community buildings and recreational facilities. It can include athletic fields, playgrounds, golf cours- es~ beaches~ riding trails and stables, recreational and community buildings and clubhouses, swimming pools, tennis and racquetball courts and associated parking areas for these facili- ties. Codes might limit coverage by buildings and parking lots to 5-10% of the minimum required common open space. At least one portion of common open space must have a suffi- ciently large coherency for active recreational use, ranging from 1-5 acres. September 23, 1994 Issue