Livermore/Pleasanton firefighters at the scene said the fire started in the fireplace and burned through part of the chimney wall's lining, catching the attic and parts of the home's second floor on fire.
At least six fire trucks, three police cars and a paramedic responded to the blaze, which required firefighters to rip out part of the home's rear roof to reach the flames.
The homeowner and a neighbor were out for a walk when the fire occurred.
No estimate of damages was available.
This story contains 130 words.
Stories older than 90 days are available only to subscribing members. Please help sustain quality local journalism by becoming a subscribing member today.
If you are already a subscriber, please log in so you can continue to enjoy unlimited access to stories and archives. Subscriptions start at $5 per month and may be cancelled at any time.