Built in 1985, San Mateo City Hall houses the City Council chambers as well as the City Manager's office, the City Clerk's office and several other important administrative offices. San Mateo residents are welcome to drop in during normal business hours and file papers or gather needed information -- and they are encouraged to come to the council chambers on those evenings (generally the first and third Mondays of every month, beginning at 5 p.m.) where the people's business is discussed and decided.