On all projects, any portion of the cost of which is to be assessed to and paid as special assessments by a benefit district, or assessed to the properties improved or benefited by the improvement, there shall be a five percent administrative fee charged, which includes engineering administrative fees. The administrative fees shall not exceed five percent of the total project cost on any single project. The purpose of the administrative fee shall be to reimburse the City for the costs of administering the project and any legal, financing and accounting administration of the project. Provided, however, there shall be no administrative fees charged on that portion of the project cost which will be paid by the City at large. (Ord. 18567 § 1, 2-14-06; Ord. 17226 § 79, 1-27-98. Code 1995 § 2-290.)