“City hall was constructed in the mid-’60s,” said City Manger Matthew Ballantyne. The goal is to open the new city hall for business in January 2028. “We’ve put together a temporary city hall at Valencia and Nuevo (avenues).”Departments previously located within city hall are now at 16860 Valencia Ave. (Courtesy City of Fontana) Show Caption 1 of 4 Fontana City Hall on Sierra Avenue is closed to the public for renovations as seen on Monday, Jan. 26, 2026. (Photo by Will Lester, Inland Valley Daily Bulletin/SCNG) ExpandThe new city hall will be significantly larger at 45,000 square feet.