Our AHJ has established an enforcement division. They investigate any complaints made about work with out permits. Our field inspectors have been instructed to stop at any site, any time, to check permits (an inspection request is not needed to have the inspector stop, since most inspectors have an area they inspect and are fimiliar with, most know the new jobs and will check up on the job once they see work going on). To that end, our administrative code was written with a section called "Right of Entry", which allows inspectors to enter any property, anytime, to perform thier job, or to investigate complaints or unsafe conditions (if they are visable from public view) which is the cause to enter.