Oregon Revised Statutes Protection from Fire § 476.150

(1) The State Fire Marshal and deputies, at all reasonable hours, may enter into all buildings and upon all premises, except private residences, for the purpose of inspection to ascertain if fire hazards exist therein or thereon. Owners of private residences may request a fire inspection of their property.

(2) No person shall interfere with or prevent any such inspection by such officers.

(3) When any person interferes with or prevents the State Fire Marshal or deputies from making the inspection mentioned herein, the officer shall apply to the district attorney of the county wherein the inspection was made or attempted to be made, for a warrant for the arrest of the offending person, and it shall be the duty of such district attorney forthwith to prosecute such offending person.