The accident happened at roughly 4:15 p.m. at a work site in the 3100 block of Ames Lake Road, according to Sgt. Katie Larson with the King County Sheriff's Office.
Larson said two male roofers were patching a cedar roof at a private home when both men slipped and fell, landing on a cement walkway roughly 50 feet down.
One of the men was pronounced dead at the scene, and the other was rushed to Harborview Medical Center to be treated for multiple broken bones. His injuries are not considered life threatening.
The homeowner was not home at the time of the accident.