Section 23-612 - Planting strips in residence districts
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In the districts indicated, the following shall provide and maintain a planting strip in accordance with Section 26-42 :
developments , or enlargements that increase the floor area on a zoning lot by 20 percent or more. However, planting strips shall not be required for enlargements of single- or two-family residences ; conversions of 20 percent or more of the floor area of a building to a residential use ; or construction of a detached garage that is 400 square feet or greater.