Four fire engines and around 25 firefighters tackled a fire at a shop and flats under refurbishment on Haydons Road in South Wimbledon.
A small part of the second floor was damaged by the fire. There were no reports of any injuries.
Control Officers took the first of two calls at 1800 and mobilised crews from Wimbledon, Tooting, Wandsworth and Mitcham fire stations to the scene. The incident was over for firefighters at 1924.
The cause of the fire is under investigation.