Firefighters were called to a home on the Manor Park Estate, Uckfield, late on Christmas Eve.
They had received reports of a smell of burning at the semi-detached home in Oak Tree Court at 11.21pm.
Crews found the roof of the property alight.
Firefighters used breathing apparatus, firefighting foam and main jets to tackle the fire.
They gained access to neighbouring property to stop the fire spreading.
They also spent time cutting away and salvaging items for the occupants.
The aerial ladder platform was used to remove tiles and make the roof safe.
East Sussex Fire and Rescue said the fire was believed to be accidental – linked to an electrical light.
No-one was injured.
In July, another property on the Manor Park Estate suffered serious damage after a lightning strike. Story here
The fire followed a blaze the previous day (December 23) at a home in Maresfield.
Crews from Uckfield and Crowborough were called to an address on Straight Half Mile.
There was a fire in electrical intake box spreading to roof void in a bungalow.
Firefighters used breathing apparatus, firefighting foam, CO2 and one hose reel jet.
There are no reports of injuries.