If any assessment is not paid within ten (10) days after its confirmation by the City Council, the amount of the assessment shall become a lien upon the property against which the assessment is made by the City Engineer; and the City Engineer is directed to turn over to the assessor and tax collector a notice of lien on each of said properties on which the assessment has not been paid, and the assessor and tax collector shall add the amount of said assessment to the next regular bill for taxes levied against the premises upon which said assessment was not paid. Said assessment shall be due and payable at the same time as said property taxes are due and payable, and if not paid when due and payable, shall bear interest at the rate of ten percent (10%) per annum.