The fire at 6101 Old Highway 53 in Clearlake was reported shortly after 7 p.m.
Lake County Fire and Cal Fire responded, finding the structure had caught nearby wildland on fire when they had arrived.
Within about 15 minutes, the wildland fire was reported to have been stopped, but radio reports indicated there were still concerns about the potential for spotting from the structure fire.
By 7:20 p.m., the structure fire was reported to have been contained, with firefighters following up with a few hours of overhaul.
The Clearlake Police Department closed Old Highway 53 from Crawford Avenue to the Galaxy Resort while the firefighting effort took place.
Just after 12:20 a.m. Saturday, a fire was once again reported at the address, according to radio reports.
Firefighters found a small rekindle of the fire in the roof area of the structure and quickly extinguished it, based on reports from the scene.
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