Every building or structure or condition in or about the same found by the mayor to constitute a nuisance requiring the abatement thereof shall, if not removed, destroyed, altered or repaired within the time allowed by and in accordance with the findings of the mayor, be deemed, and every such building, structure or condition are declared to be a public nuisance; and every such nuisance may be abated summarily by the board of condemnation, who may employ any necessary assistance to cause such buildings, structures or conditions in or about the same to be removed, altered, repaired or destroyed. The board of condemnation shall prepare an itemized statement of all expenses incurred in the alteration, repair, removal or destruction of the same and shall mail a copy thereof to the owner of the property demanding payment within twenty (20) days from the date of mailing. The notice shall be deemed delivered when mailed by registered mail addressed to the property owner's last known address. In the event the owner fails to make payment of the amount set forth in the statement to the city treasurer within such twenty (20) days, the board of condemnation, on behalf of the municipality, may cause suit to be brought in an appropriate court of law or may refer the matter to the county treasurer as hereinafter provided. In the event the collection of the costs are pursued through the court, suit shall be commenced in behalf of the city for all of the costs of removal, alteration, repair or destruction together with reasonable attorney fees, interest and court costs. In the event the board of condemnation elects to refer the matter to the county treasurer for inclusion in the tax notices of the property owner, it shall make in quadruplicate an itemized statement of all expenses incurred in the removal and destruction of the same. It shall deliver three (3) copies of the statement to the county treasurer within ten (10) days after completion of the work. (Prior code § 6-2-4)