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21660 Copley Dr
Diamond Bar, CA 91765 Walnut Valley

Rate Upon Request

Office For Lease

Property Details

  • Property Type Office
  • Year Built 1988
  • Total Building Size 50,332 SF
  • Tenancy Multiple
  • Building Class B
  • Zoning OB
0 Transit Score
34 Walk Score

Description

Contemporary 3-story office building nestled within a premier 255-acre business park. This well-positioned property offers a striking corporate presence with expertly manicured grounds. Situated at the gateway of four counties with convenient access to Ontario International Airport and major freeways (10, 57, 71 & 60). The location is complemented by extensive nearby amenities, including hotels, dining, and retail.

Amenities

  • Bus Line
  • Day Care
  • Food Service
  • Energy Star Labeled

Major Tenants

Tenant SF Occupied Lease End Date
Beyond Century Consulting
Chao Wang
CM Partners Group
Greg Ashwill
Impro Industries Usa Inc
Lin Consulting Inc
PSI Services
US Inspector General 5/31/2026
Vigoruous W. Development Co.
Western Resources Title

Public Transportation

Commuter RailDriveWalkDistance
Industry (Riverside Line - Southern California Regional Rail Authority (Metrolink)) 4 min - 1.9 mi
Downtown Pomona (Riverside Line - Southern California Regional Rail Authority (Metrolink)) 13 min - 10.0 mi
AirportDriveWalkDistance
Ontario International 18 min - 18.7 mi
John Wayne/Orange County 27 min - 27.1 mi
Long Beach (Daugherty Field) 36 min - 31.7 mi

Parking Details

Parking Available: Yes
Reserved: No
Spaces Provided: 200
Type: Surface
Included in Rent: Yes