Ottawa Fire sounded two alarms late Monday afternoon to battle a blaze at an abandoned building in the Greenbank-Strandherd area of Barrhaven.
They were called to 1034 McGarry Terrace at about 5:45 and the fire was under control by about 6:20.
There were concerns a nearby retirement home would need to be evacuated due to smoke, though the order did not come.
Damage is estimated at $125,000.
Ottawa Police are involved in the investigation.