Ten fire engines and around 70 firefighters were called to a fire at a school on Seagrave Road in Fulham.
Part of an atrium was damaged by fire in a four storey building with basement. No injuries are reported.
The Brigade was called at 1011 and the fire was under control by 1147. Fire crews from Fulham, Chelsea, Kensington, Wandsworth, Hammersmith, Clapham, Lambeth and Soho fire stations were in attendance.
The cause of the fire is under joint investigation by the Brigade and the Met police.