Emergency services were called to an arson attack in the early hours of Wednesday morning.
LATEST: Police arrest woman over early morning arson attack
The incident took place at a property on Queensway, between Yeadon and Guiseley, shortly before 3am.
Firefighters from Rawdon, Stanningley and Cookridge helped one woman out of the fire-hit house and tackled the blaze.
A spokesperson for the fire service said the incident was being treated as arson.
West Yorkshire Police and Yorkshire Ambulance Service also attended the scene.
The woman was taken to hospital as a precaution for smoke inhalation.
A brick was reportedly thrown through one of the windows, according to one resident.
A spokesperson for West Yorkshire Police said: "At 2.49am today (Wednesday), police were called by the fire service to a house fire in Queensway, Yeadon.
"Officers were advised the blaze was believed to have been started deliberately and following enquiries a 29-year-old woman was arrested on suspicion of arson with intent to endanger life.
"She remains in custody at this time and enquiries are continuing."
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