[2] In 1909, officials from the city of Willimantic requested funding for a modern armory from the Connecticut General Assembly.

A 300 foot by 160 foot lot was purchased from Samuel Chesbro for $6,500 and the architectural firm of Whiton & McMahon was awarded the contract to design the building and the builder F. D. Kent received $32,405 for the construction.

[1] The Willimantic Armory consisted of two distinct elements, both of red-brick construction.

The head house was a two-story, flat-roofed structure surmounted by a high parapet and a blocky tower.

The drill shed was a 1+1⁄2-story gable-roofed structure in the rear of the head house.