Watertown Fire responded to a structure fire at Evolution Motor sports on West Hwy 212. They was a fire in the attic space of a building currently under remodel. Fire crews were able to extinguish the fire and do light overhaul. No major damage was done to the building. Apparently construction workers were grinding on some metal earlier in the day and started a fire from the sparks. Crews were on scene about 1 hr. 30 min.