Ottawa Fire Services say they received a call reporting grey smoke coming from the a unit in the 2200 block of Tenth Line Road around 6:20 Saturday evening.
Firefighters arrived on the scene just a few minutes later and declared a working fire.
The unit was unoccupied at the time, and the fire was brought under control shortly after.
The fire caused approximately $100,000 in damages.
The cause of the fire is unknown and a fire investigator has been called to the site.