If the work to be completed is limited to the work required to be performed within the City's right-of-way, such as, but not limited to, sidewalk, trees and/or lampposts, the applicant may choose to submit a certified check made to the order of the City of Mount Vernon, in a sum equal to the cost of the work, as estimated by the Commissioner of Buildings, plus 15% administrative cost, together with the agreement listed above, which shall additionally authorize the City of Mount Vernon to perform the work should the applicant exceeds the time limitation and any extension thereof.