Notwithstanding any other provisions of this article, whenever the Chart of Uses (interpreted in the light of Section 106 and the other provisions of this article) provides that a use in a nonresidential zone or a nonconforming use in a residential zone is permissible with a zoning permit, a special-use permit shall nevertheless be required if the administrator finds that the proposed use would have an extraordinary impact on neighboring properties or the general public. In making this determination, the administrator shall consider, among other factors, whether the use is proposed for an undeveloped or previously developed lot, whether the proposed use constitutes a change from one principal use classification to another, whether the use is proposed for a site that poses peculiar traffic or other hazards or difficulties, and whether the proposed use is substantially unique or is likely to have impacts that differ substantially from those presented by other uses that are permissible in the zoning district in question.