Four fire engines and around 20 firefighters and officers were called to a fire at a house in Burges Road in East Ham this morning.
Half of the first floor and part of the ground floor of a mid terraced house were damaged by fire.
One woman and one man left the property before the arrival of the Brigade and the woman was treated at the scene by London Ambulance Service crews.
The Brigade was called at 0037 and the fire was under control at 0153. Fire crews from East Ham. Plaistow, Barking and Ilford fire stations attended the scene.
The cause of the fire is under investigation.