Four fire engines and around 25 firefighters tackled a fire at an outbuilding on Whitefoot Terrace in Bromley.
The outbuilding was destroyed by the fire. There are no reports of any injuries.
Control Officers took the first of 19 calls at 1802 and mobilised crews from Bromley, Lee Green, Beckenham and Eltham fire stations to the scene. The fire was extinguished by 1902.
The cause of the fire is under investigation.