Crews were called to the scene, the Summerwalk Apartments at 22440 Benson Road SE, after receiving reports of flames shooting from the building and a nearby shed.
Two units were completely destroyed by the blaze and two others sustained smoke damage before firefighters were able to extinguish the flames.
One witness who lives in the apartments told KOMO News that he woke up from a sound sleep and saw an orange glow, then saw flames leaping from a nearby shed. He woke up his family and they were able to escape.
Another witness, Mira Samarik, who lives in a nearby home, said the fire was huge.
"My little sis came banging on my door, and I looked out the window, and I could see out my back yard this huge fire," she says. "It looked like it was coming from the apartments."
The American Red Cross is helping the families displaced by the fire.
Everyone was able to escape the flames and there were no injuries, officials said.