And now a $10,000 reward has been offered for information leading to the arrest of the person or persons responsible, reports KOMO's sister station in Yakima, KIMA-TV.
Yakima County fire crews responded to the scene, at 260 "A" Street, in the early morning hours. Officials say they believe the latest fire is related to the others.
No one was in the home at the time of the fire. Damage is estimated near $20,000.
Crews say the majority of the damage was to a window, paint and a security light. Fire officials say the residents had just installed the security light because of the recent fires.
Since May 2, fires have been set in two vacant homes and an abandoned hotel and abandoned hardware store.
Yakima County Fire District 5 Deputy Chief Kevin Frazier told the Yakima Herald-Republic the fires may have been set by teens who were kicked out of the empty buildings or by a neighbor tired of the teens congregating.
Neighbors have been dismantling another vacant home to prevent it from becoming the next arson target.
Anyone who has information on this fire or any of the other arson cases should call the Yakima County Sheriff's Office.