Saugeen Shores Fire went to a Goderich Street building around 2:30 yesterday afternoon to find smoke coming from the upper level units.
A total of twenty firefighters from the Port Elgin and Southampton fire stations arrived at the scene.
An investigation revealed there was smoke coming from a roof cavity between two building.
The fire was quickly put out but one person was displaced and is staying with family.
Saugeen Shore Fire Prevention is investigating the cause.