Prime Location Available for Lease! Highly visible office and retail spaces are in a bustling Diamond Bar Blvd plaza next to the Post Office, one of the best spots in Diamond Bar. The ideal size of 1000 sq. ft. with ten office rooms, (also has plus 1,860 sq. ft., 2080 sq.ft. and 520 sq. ft. ) Plenty of parking for both office and retail visitors, with convenient access from Freeways 60 and 57.