When property in zone RPD is developed pursuant to this article, determination of the permitted density will be based upon consideration of existing and projected area zoning and development, street widths, and availability of public facilities. When justified by these aforementioned factors and in cases where the commission finds that the proposed development offers amenities and benefits to the community substantially in excess of those normally provided, it shall have the power to permit a density not more than fifteen percent greater than that permitted in zone R-4.
(Prior code § 3-2-B-9(2)(b))