Four fire engines and around 25 firefighters tackled a fire on Percival Road in Feltham.
Half of a shed and aviary was damaged by the fire. One person was taken to hospital by London Ambulance Service and two further people were treated on scene.
Control Officers took one call at 1513 and mobilised firefighters from Feltham, Twickenham and Heston Fire Stations to the scene. The incident was over for firefighters at 1654.
The cause of the fire is under investigation.