Site plan review is required for the following types of development applications: new construction that involves any of the following:any proposed development over 15,000 square feet of gross floor area; developments with multiple structures on a single lot, excluding accessory structures; and all multi-tenant commercial development, including mixed-use development; subdivision of land; additions or structural alterations to an existing structure, other than a single-family detached or semi-detached dwelling, that results in a 50% increase in gross floor area over the gross floor area of the existing structure prior to the addition or alteration; planned unit development; conditional use, unless the conditional use can and will be fully contained within an existing structure; parking lot or structures containing 5 or more motor vehicle parking spaces; any development within an environmentally sensitive area, including projects in a Floodplain District and projects within the Buffer of the Critical Area (<em>see</em> Subtitle 3 {“Environmentally Sensitive Areas Review”} of this title); urban agriculture or community-managed open-space farm; any development within the C-5-IH Subdistrict; and multiple principal structures on a residential lot per <cite data-path="32|§15-203">§ 15-203</cite>. Ord. 16-581 Ord. 17-015 Ord. 18-171 Ord. 21-020