The district is listed on the National Register of Historic Places since April 23, 1975.

The location of Windsor on the banks of the Connecticut River provided an easy access to transportation routes, and this access was further reinforced by the construction of a railway in 1847.

In the 19th century, Windsor was a prosperous industrial and administrative center.

By the end of the 19th century, the major industrial enterprises in Windsor were producing water pumps, firearms, machine tools, and cotton.

[2] In 1997, three properties on Phelps Court and State Street were added.