Dates given for the William H. Barns House, at 17 Granite Street in New London, vary widely, including 1850, 1852, 1865 and 1875. Perhaps the house was built in the 1850s in the Italianate style, with the Second Empire mansard roof being added later. The Colonial Revival front entrance is probably also a later alteration. The house also has unusual flush board walls. William H. Barns, son of Acors Barns, succeeded his father as president of the National Bank of Commerce, serving from 1862 to 1866. He was also involved in the founding of other banks.
William H. Barns House (1852)
Those window surrounds look very Henry Austin like. Very much like the Pitkin Norton house. I’d say it was very likely Italianate with the roof added later.