Alcohol and excessive speed appear to be factors in the crash, said a King County Sheriff's Office spokesman.
Medics and deputies responded to the scene, on Westminster Way North near Greenwood Avenue North, at about 12:10 a.m. after receiving a report of a crash.
A preliminary investigation found that the SUV was headed north on Westminster Way North when it veered off the roadway, plowed through two street signs and crashed into a power pole.
The force of the impact knocked down some electrical lines that powered street lights in the area.
The SUV caught fire, and was completely engulfed in flames when firefighters arrived at the scene.
The driver was able to get out of the vehicle. He was taken to Harborview Medical Center in Seattle for treatment of a non-life-threatening head injury. There were no passengers in the SUV, and no other vehicles were struck in the crash.