Assessment costs for the installation of public improvements relating to property zoned and vacant at the time of the creation of the improvement district or zoned and being used for other than single-family detached dwellings and two-family detached dwellings at the time of the creation of the improvement district shall be based upon the benefit to the property considering the actual cost of the public improvements, which includes the cost of curb and gutter; sidewalk; pavement, including 18 feet of subbase, base and surfacing; earthwork; street lighting; intersections; street inlets and drainage; other miscellaneous and incidental work as necessary to complete the work to city standards. The cost shall also include engineering, quality control, bond costs, collection and other incidental fees. (Code 1979, § 34-153)