A Special Inspector is a third party, independent inspector hired by the property owner to inspect specific elements of a project (i.e. welding, structural bolting, high strength concrete, masonry, fireproofing, etc.) as prescribed by the building code. Special Inspection firms that have been recognized by the City of Sonoma for specific types of special inspections can be found on the City’s list of Recognized Special Inspection Agencies on the Resource Links page.