Factor considered in issuing permit. Any buildings, structures, or other improvements on Downtown Commercial District lands shall be permitted only when authorized and approved by the Plan Commission and the Common Council. In determining the acceptability of proposed structures, buildings, or improvements, the Plan Commission and Common Council shall take into consideration the following factors, as well as any others they deem appropriate: the effect of the proposed change or addition on the health, safety, general welfare, and prosperity of the City and the immediate area in which such change or improvement would occur, including such considerations as the effect on the established quality and character of the area, historical and original significance of the existing architecture, physical attractiveness and aesthetic and architectural consistency with the area, existing topography, drainage features, erosion potential, vegetative cover, pollution control, floodways and floodplains, and circulation of traffic. The overall need for the proposed change or improvement in the Downtown Commercial District, along with the demand for related services, and the possible nuisance or hazardous, harmful, noxious, or offensive effects resulting from noise, dust, smoke, odor, increased traffic or other factors will also be considered in deciding whether to permit the proposed structure, building or improvement.