The Los Angeles County Fire Department inspects all commercial buildings in Diamond Bar to detect fire and life hazards in accordance with the Los Angeles County Fire Code. All commercial businesses are initially inspected in conjunction with application for an occupancy permit. Thereafter, businesses are inspected on an annual basis.

Fire Department personnel conduct all business fire inspections. Violations of the Los Angeles County Fire Code can result in fines and closure of the business. If you have any questions regarding commercial fire inspections, contact the Los Angeles County Fire Department's Fire Prevention Office at 909.620.2216.