The Realty Building was constructed in 1924 for the Realty Guarantee and Trust Company, and was designed by architect Morris W. Scheibel. In 1955,
gale-force winds severely damaged and tore the roof off of the building, requiring $50,000 to repair. In 2009, the building was renovated into a 23-unit apartment complex. It is listed on the
National Register of Historic Places. On the day of the explosion, Greenheart Companies workers approved by the Youngstown Board of Control were present in the basement to clear debris, piping, and old utility lines for water, gas, electrical, data, and phone lines. They made three cuts onto a pipeline on the basement wall, with the third cut believed to have caused a gas leak six minutes prior to the explosion. After evacuating the basement, the crew immediately pulled the
fire alarm, alerted the
Chase Bank on the first floor, called
911, and tried to evacuate residents. == Explosion ==