Sunset Plaza Professional Building

The property benefits from prominent frontage along N. Diamond Bar Boulevard, the primary north-south commercial corridor through the City of Diamond Bar. The site is positioned approximately 0.5 miles from the SR-60 / SR-57 Freeway interchange, one of Southern California's highest-volume traffic junctions and a critical commuter route connecting the Inland Empire to Greater Los Angeles. Combined freeway traffic counts at the 60/57 interchange exceed 300,000 vehicles per day (Caltrans, 2024), providing exceptional visibility and accessibility for tenants and their clients.Lee & Associates Pasadena is pleased to present the exclusive opportunity to acquire the Sunset Plaza Professional Building, a ±47,196-square-foot, three-story Class B multi-tenant office building located at 556 N. Diamond Bar Boulevard, Diamond Bar, California. Built in 1988 and consistently well-maintained throughout ownership, the asset is situated on 2.76 acres with a parking ratio of ±4.0 per 1,000 SF. In addition to the on-site count, a reciprocal parking agreement with Global Mission Church, located immediately adjacent to the property, is in-place through March 18, 2033. This agreement provides Sunset Plaza Professional Building occupants access to 49 additional stalls on weekdays and Saturdays from 6:00 AM to 6:30 PM, increasing the effective parking ratio. Visit: