Fire crews were called to the home by neighbours around 4 a.m. PT Saturday.
Firefighters say flames were through the roof and the fire was burning right through three floors when they arrived.
Officials say there was a small delay while the fire department waited for the main rig to arrive with breathing apparatus before they could get inside.
The fire is believed to have started in the living room.
Fire officials say the home was equipped with fire detectors, but they weren't working.Suggest a correction