3-110.A. In the Residential Zone Districts, on lots with a pre-construction grade or slope of the building’s site coverage of less than 25%, residential and accessory/secondary structures shall contain no more than one floor level that is below the post-construction grade low point of the building’s site coverage. A basement with a stepped floor is allowed. The finished floor level of the basement shall be no more than 12 feet below the finished floor above.

3-110.B. In the Residential Zone Districts, on lots with a pre-construction grade or slope of the building’s site coverage of 25% or greater, residential and accessory/secondary structures shall contain no floor levels that are below the post-construction grade low point of the building’s site coverage.