Damage was extensive after a fire broke out overnight at a parking structure in the Victoria Park and Eglinton avenues area.
Emergency crews were called to the scene at an apartment building around 2 a.m. on Friday.
The fire was knocked down quickly but a number of cars were damaged.
Officials say the fire was caused by careless smoking.
This is the second garage fire in a week. Last Friday, a fire at a parking garage in Mississauga left behind extensive damage.
No injuries were reported in either incidents.