As the city hall, the original house was expanded considerably with a three-by-ten-bay addition, completed in the early 20th century.

[3] The former Sanford Mansion is a 3-story, brick Classical Revival building designed by Albert W. Fuller which was extensively remodeled in 1913–1917.

It features a massive portico with six fluted columns topped by Corinthian order capitals.

The former laundry house is a simple 1+1⁄2-story brick building with a slate-covered gable roof.

[3] Amsterdam City Hall was added to the National Register of Historic Places in 2001.