Whenever any building or structure has been condemned by the Building Inspector and the existence of the building or structure in a dilapidated state of disrepair or other substandard condition is found and determined by the Building Inspector or, upon appeal from or report by the Building Inspector as hereafter provided, by the Board to be dangerous to life, health or other property, or is in a condition so as to constitute a fire or safety hazard or a public nuisance, the owner of the building or structure shall be required to demolish and remove the same and remedy the conditions under the regulations and procedures herein provided. In the event the owner fails or refuses to do so within the time directed by the Building Inspector or by the Board as hereinafter provided, the Board of Aldermen may, in its judgment, cause the same to be demolished and removed, or any other steps taken as it may find to be necessary to suppress and abate the nuisance and remove the fire or safety hazard and the danger to life, health or other property found to exist, and specially assess the cost and expense of doing the work against the lot or parcel of land on which the building or structure is located.
(`94 Code, § 4-21)