Firefighters were called to a house fire in Condor Way, Burgess Hill, on Monday (October 26).
West Sussex Fire and Rescue Service (WSFRS)said the blaze started in a first floor bedroom of a semi-detached house at around 4.30pm.
WSFRS said it was caused by worn wiring for a standing lamp.
Three fire engines attended. Seventy per cent of the house was damaged by smoke.
No-one was hurt.