Firefighters responded about 1:30 p.m. to a garage in the 1600 block of 56th Court Southeast in the Lakeland Hills area of Auburn, according to the Valley Regional Fire Authority.
A neighbor called 911 to report smoke coming from the garage.
Crews contained the blaze to the garage, and found a dog deceased inside.
No one was home at the time of the fire.
The cause of the fire is being investigated.