A neighbour raised the alarm when fire broke out at a house in Kirkmoor Road, Clitheroe.
The fire started in a bedroom at about 4-45 pm yesterday while the householders were out, but the noise of the smoke alarm going off alerted the neighbour.
Clitheroe firefighters were soon on the scene and dealt with the blaze using a hosereel, then they used a ventilator to clear the house of smoke.
The bedroom was severely damaged, and there was damage throughout the property. Firefighters were at the scene for two hours.
“We believe the occupants were out at work when the fire started,”said fire station watch manager Dave McGrath.
“The alarm call from the neighbour meant we managed to prevent a lot more damage at the house.”
The cause is being investigated, and it is believed a faulty electrical appliance was to blame.