Colorado Springs firefighters smothered a fire late Thursday morning that started in large metal shipping containers attached to the building in the 1400 block of South 8th Street at West Brookside Street.
Fire Lt. Fred Varnell said the fire was reported by construction workers at the building at 11:43 a.m. and passersby who saw a plume of smoke visible as far away as downtown Colorado Springs.
Crews had extinguished the fire by about 12:20 p.m.
The building is home to multiple outdoor adventure companies, including Gearonimo Sports and has been under construction since summer.
Varnell said the companies were storing inventory in the containers, which may have been the source of the fire.