The first started in the garden and spread to the attic. It was contained within 20 minutes.
Officials say no one was in the house at the time, and no injuries have been reported.
Officials estimate as-much-as $80,000 worth of damages.
On Saturday afternoon, firefighters were called to a small brush fire on Morro Road in Atascadero. Two structures were threatened for a while, but the fire was put out before any damage could be done. About a half-acre burned. The cause is undetermined.