Except as provided in subsection (b) of this section, design review is required for the following types of development:new construction of dwellings; upper floor additions and roof decks on existing rowhouses; additions on street-front facades, to include deck, porch, and balcony additions; when exterior modifications are proposed for residential conversions in the R-7, R-8, R-9, and R-10 Districts; the establishment of a non-residential use within the R-MU Overlay District; all new construction and additions in the C-5 District; all substantial modifications of the facade of a structure in the C-5 District; planned unit development; any sign that is conditional on Board of Municipal and Zoning Appeals approval, but without regard to its copy or message; any painted/mural sign, but without regard to its copy or message; any sign over 100 square feet in area; any electronic sign, freestanding sign, or roof sign, but without regard to its copy or message; any freestanding sign in the C-5 or PC District, and any banner sign, projecting sign, or wall sign above the ground floor in the C-5 or PC District, but without regard to its copy or message; any Signage Plan and any sign, but without regard to its copy or message, within an Area of Special Sign Control; multiple principal structures on a residential lot per <cite data-path="32|§15-203">§ 15-203</cite>; any new construction that involves:a proposed development over 15,000 square feet; a multi-tenant commercial development, including mixed-use development; alteration to a street-front facade in a C-1 District; or construction in a TOD District or in the W Overlay District; and new construction or substantive modifications that include a shared-use path. Design review is not required for development projects that are subject to review by the Commission for Historical and Architectural Preservation. Ord. 16-581 Ord. 17-015 Ord. 18-171 Ord. 18-216 Ord. 22-181