Malloy, who was also arrested in connection with the arson, is facing charge of aggravated assault on an officer, too.
Investigators believe the fire was allegedly set in retaliation for a fight at a Penn Hills bar.
According to court documents, when Smith and Malloy were arrested, they smelled of gasoline.
The documents also reveal Smith was captured on surveillance video buying gasoline from a Sunoco.
The fire was so intense that it caused parts of the roof to collapse, and, at times, the home could not be seen through the flames and heavy smoke.
Both Smith and Malloy are in the Allegheny County Jail.