Mo. Rev. Stat. § 82.810
When any building or part thereof, tower, retaining wall, fence wall, smokestack or other similar structure, situated in a city having five hundred thousand inhabitants shall be found by the division of building and inspection, of such city, to be in a condition such as to endanger the lives of persons or likely to cause immediate injury to other property and when the owner, lessee, or both of such property shall have been notified in writing by the building commissioner or other legally authorized officer, upon whom is imposed the duty of condemning buildings, to remove, repair or otherwise secure such building, tower, retaining wall, fence wall, smokestack, or other similar structure and when such building cannot, by use of reasonable means, be removed, properly repaired or otherwise secured without having access to and upon the land, building or premises of an adjoining owner, the owner or lessee shall at least three days before the proposed work is to be commenced, notify the owner or lessee of such adjoining property, in writing, that in order to remove, repair or secure such building or structure it will be necessary for him to enter and temporarily occupy his or their premises, such notice shall state the character of the work to be done; the probable time required for its completion; the part of the land, building or premises proposed to be occupied; the use to be made thereof, together with a true copy of the notice served upon him by the building commissioner or other legally authorized official. If upon the receipt of such notice, the owner, lessee or both, of such adjoining premises shall refuse to permit the entrance and temporary occupancy of his or their premises, for said purposes, the person or persons desiring the entrance and occupancy thereof shall file a duly verified petition in the circuit court containing a statement of facts showing a compliance with the provisions of this section, together with an accurate description of the work necessary to be done; the time reasonably required to do it; the manner in which the premises are to be occupied, a description of the land, building and premises proposed to be occupied. If it shall be made to appear to the satisfaction of the court that an entrance and temporary occupancy of the premises of the adjoining landowner is necessary to protect the safety of persons or property, the court shall, upon the execution by the plaintiff or some responsible person for him of a bond with sufficient surety or sureties to such adjoining property owner, or lessee, in such sum as the court or judge shall deem sufficient to fully secure to such adjoining property owner, or lessee, the payment of any damages that may be occasioned by such entry and occupancy and pay all cost of such proceedings. The court shall at once cause a summons to be issued and served upon the owner, lessee or both, of such adjoining land, building or premises, requiring him or them to show cause, if any they have, at a designated time within five days, why he or they should not be required to permit such entrance and occupancy of the land, building or premises in question. If the adjoining property owner, or lessee or both, shall fail to show good cause why permission should not be granted, an injunction shall issue commanding the owner, lessee or both, of such adjoining premises to permit the entry and temporary occupancy for a definite length of time, to be therein specified, as the court may find to be necessary, by the exercise of reasonable diligence, to remove, repair or otherwise place the structure in question in a safe condition. The proceedings for the enforcement of this section, not herein specifically provided for, shall be in accordance with the provisions of chapter 526 relating to injunctions.
§ 82.810, RSMo