Gwinnett County fire officials say paramedics treated the three people as firefighters battled the blaze Sunday evening on Coalville Drive in Lawrenceville, just northeast of Atlanta.
Fire officials say the women were treated by paramedics for minor to moderate burns and possible inhalation burns.
The toddler was treated for smoke inhalation.
Gwinnett County fire Capt. Eric Eberly says all three people were taken to Gwinnett Medical Center in Lawrenceville.
Fire investigators have determined that the blaze was accidentally caused by a grease fire on a stove that was being used in the garage.