The Headquarters building is located at 900 South Fremont Avenue in the City of Alhambra. You can inquire about your regional centers and other details from the headquarters directly. Otherwise, offices like the Land Development Division permit office are open from 7:00 a.m. to 3:30 p.m while the Building and Safety permit offices are open from 8:00 a.m. to 4:30 p.m., Monday through Friday.