735 ILCS 5/17-106

Appointment of commissioner and surveyor. The court in its discretion, sua sponte, or on the motion of any interested party, must appoint a disinterested commissioner who, subject to direction by the court, shall report to the court in writing under oath as to whether or not the premises are subject to division without manifest prejudice to the rights of the parties and, if so, report how the division may be made. The court may authorize the employment of a surveyor to carry out or assist in the division of the premises. The fees and expenses of the commissioner and of the surveyor and the person making the sale shall be taxed as costs in the proceedings.