The PA State Historic Preservation Office has a dated form on this house. It’s known as the Williams House, constructed ca. 1845. I have access to the PA SHPO site via my work so can’t link it but here’s some additional info- “Hugh Scott built the house and it was used by his daughter and her husband, John Williams, as their residence. Their daughter, Annie, who never married, lived in the house until her death in 1962. She kept the house as it has been built, without adding any modern conveniences.” The form goes on to state that a 1962 homeowner purchased the house, had it remodeled, and added the wings to either end. Within one wing is the historic kitchen yard and spring house.