 The title "Building control officer" (BCO) (also known as a "building inspector" or a "building control surveyor") is used predominantly by local authorities, which confer the title of "officer" to many staff who have regulatory, supervision or enforcement roles.Private sector "Approved Inspectors" generally do not refer to themselves as "officers".Building control professionals practice in the public sector with local authorities or in the private sector as companies or individuals who are recognised as Approved Inspectors.