The original architect is unknown, but Frederick J. Osterling remodeled the house and was responsible for additions between 1912 and 1923.

Gwinner died in 1949, and his widow, Adele, owned it until 1963, when the house was sold to Dr. Leo Harter.

In 1987, a fire caused by a paint-stripping gun during renovation burned much of the third floor and damaged the roof.

Harter died in 1988, and the house sat vacant for eight years, was boarded up, and had even been considered for demolition.

According to the Allegheny County Pennsylvania Real Estate Assessment Page, the house's estimated previous year market value for 2010 was $1,110,800.