From the Seattle Fire Department:

Just after 6:00 a.m. this morning, firefighters responded to a garage fire in the 5400 block of 23rd Avenue SW. When firefighters arrived, there was heavy smoke and flames coming from a large detached garage. Firefighters attacked the fire and worked to prevent it from spreading to other structures. The fire did not extend to the house. Residents were home at the time of the fire and they got out of the house safely. There were no injuries. Several vehicles inside the garage suffered extensive damage and there was minor damage to a car parked in the alley behind the garage.

Fire Investigators are on the scene and will work to determine a cause and damage estimate for the fire.