Four fire engines and around 25 firefighters tackled a fire at a block of flats on Windley Close in Forest Hill.
Part of a three roomed flat on the third floor was damaged by the fire. Firefighters wearing breathing apparatus rescued a dog from the flat. There are no reports of any injuries.
Control Officers took the first of three calls at 1840 and mobilised crews from Forest Hill, Lewisham, Peckham and New Cross fire stations to the scene. The fire was extinguished by 1930.
The cause of the fire is under investigation.