The Josephine County Assessor's Office lists Deann and Richard Richardson as the owners of the two-story home, which was destroyed.
The couple's son and daughter-in-law lived in the home, but Richardson's wife was staying with someone else, Sheriff's Lt. Lee Harman said.
Harman said Richard Richardson, 59, shot himself once and left a suicide note. Although they suspect he set the fire, officials were waiting for the State Fire Marshal's Office to confirm the cause of the fire.
Harman said Richardson's wife obtained a restraining order against him that was served on Monday.
``He was depressed about that,'' the lieutenant said. ``The family spent most of the night with him because of his depression.''
Richardson's body was found in a motor home parked near a barn on the property, police said.
