Crews say the fire began shortly before 5:30 p.m. Around 6:30, crews say the blaze was reduced to a smolder and under control. Crews remained on scene to check for hot spots.
According to Wellington Fire, the blaze was in one of Carter Lumber's back buildings, not the main store.
No injuries or rescues were reported.
Officials are still investigating what caused the fire.
Check back for updates on this developing story.