3501-3509 S Mason St

3501-3509 S Mason Street is a 24,750-square-foot flex/retail property on 1.38 acres in Midtown Fort Collins, just off S College Avenue between W Drake Road and W Horsetooth Road. Built in 1972 and 1977, the two buildings are divided into seven tenant spaces, each with its own electric and gas meters, served by ten 12-foot roll-up garage doors, 14 restrooms, and 66 dedicated parking stalls.

• Midtown Location. The property sits just off S College Ave/HWY 287, 4.5 miles from Interstate 25 and 60 miles from Denver.
• Seven Metered Spaces. Each of the seven tenant spaces has individual electric and gas meters, allowing for a future condo conversion.
• Ten Roll-Up Doors. Ten 12-foot roll-up garage doors serve the tenant bays.
• Recent Capital Improvements. The roof and HVAC were upgraded in 2020, the exterior was repainted in 2024, and a new fire wall was added at 3501 in 2026.
• 66 Parking Stalls. A 66-stall dedicated parking field was resurfaced in 2026.