Whenever an order to repair, vacate and repair or demolish any building or structure, or any portion thereof, has not been complied with within the time set by the building official, or upon appeal to the board of appeals or the city council, as the case may be, the city council shall have the power, in addition to any other remedy herein provided, to:

(a) Cause the material of any such building or structure to be sold in any manner which the council may determine upon; provided, that any such sale shall be upon condition that the building or structure be forthwith demolished, the wreckage and debris thereof removed and the lot cleaned. The council may sell any such building singly or otherwise. Any surplus of the sale of any such building or structure, or group of buildings and structures, over and above the cost of the demolition and of cleaning the site shall be retained to be distributed to the parties or persons lawfully entitled thereto;

(b) Cause the building or structure to be repaired or demolished. The cost thereof shall be assessed against the property upon which the particular building or structure is located. The repair or demolition of any building or structure, or sale of the materials thereof, shall be by a contract awarded following advertisement for bids, to the lowest and best bidder in the case of repair or demolition work and to the highest and best bidder in the case of the sale of material. (Ord. No. 2276 (NCS), § 8(I).)

* For state law as to the power of cities to abate nuisances, see Gov. C., § 38773.