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t t f Shoreland Management Overlay 4. Impervious surface coverage of lots must not exceed the following percentages of lot area: 5. Medium density residential, commercial, and industrial structures, parking areas, and other facilities shall be treated to reduce visibility as viewed from public waters and adjacent shorelands by vegetation, topography, increased setbacks, or color, assuming summer, leaf -on conditions. Vegetative and topographic screening shall be preserved, if existing, or may be required to be provided. 6. Accessory structures and facilities shall meet the required principal structure setback and shall be centralized. 7. Multiple - family developments shall contain open space meeting the following criteria: a. At least 35% of the total development area shall be preserved as open space; b. Dwelling units or sites, land covered by road surfaces, parking areas, or structures are developed areas and shall not be included in the computation of minimum open space; c. Open space shall include areas with physical characteristics unsuitable for development in their natural state, and areas containing significant historic sites or unplatted cemeteries; and d. The shore impact zone, based on normal structure setbacks, shall be included as open space. At least 50% of the shore impact zone area of existing developments or at least 70% of the shore impact zone area of new developments shall be preserved in its natural or existing state. 8. Residential subdivisions exceeding those permitted by the lot area standards of this section can only be allowed if designed and approved as a Residential Planned Unit Development under § 1102.13 of this chapter. NE RD GD R Single- family 30% 30% 30% 30% Two - family /duplex 30% 30% 30% 30% Triplex/quad /townhomes 35% 35% 35% 35% Commercial /industrial 60% 60% 60% 60% 5. Medium density residential, commercial, and industrial structures, parking areas, and other facilities shall be treated to reduce visibility as viewed from public waters and adjacent shorelands by vegetation, topography, increased setbacks, or color, assuming summer, leaf -on conditions. Vegetative and topographic screening shall be preserved, if existing, or may be required to be provided. 6. Accessory structures and facilities shall meet the required principal structure setback and shall be centralized. 7. Multiple - family developments shall contain open space meeting the following criteria: a. At least 35% of the total development area shall be preserved as open space; b. Dwelling units or sites, land covered by road surfaces, parking areas, or structures are developed areas and shall not be included in the computation of minimum open space; c. Open space shall include areas with physical characteristics unsuitable for development in their natural state, and areas containing significant historic sites or unplatted cemeteries; and d. The shore impact zone, based on normal structure setbacks, shall be included as open space. At least 50% of the shore impact zone area of existing developments or at least 70% of the shore impact zone area of new developments shall be preserved in its natural or existing state. 8. Residential subdivisions exceeding those permitted by the lot area standards of this section can only be allowed if designed and approved as a Residential Planned Unit Development under § 1102.13 of this chapter.