Four fire engines and around 25 firefighters tackled a fire in a semi-detached house in Nightingale Close, Biggin Hill.
Half of the ground floor was damaged by fire. One woman was treated on the scene by London Ambulance Service.
Sadly, the body of a cat was found on the first floor.
The Brigade was called at 1650 and the fire was under control by 1830. Fire crews from Biggin Hill, Addington, Bromley and Orpington fire stations attended the incident.
The cause of the fire is believed to be a tumble dryer.