The property consists of six buildings comprising roughly 105,000 square feet of space, spread over five acres at the confluence of the Bigelow Brook and Hockanum River.

Under Buckland's ownership, the mill reportedly produced wool for the suit that President George Washington wore to his inauguration.

In 1828, Tracy and Williams conveyed the property to Sidney Pitkin, who took on Elisha Edgarton Hilliard as an apprentice there.

During Hilliard's tenure, the company made blankets and clothing for the Union Army in the American Civil War.

The company acquired the rights to a brick-lined pond in 1901, the former Peter Adams site, and built a long raceway that extended through Building #4 for both power and washing requirements.

At the time, the Hilliard Company was the oldest family-owned, continuously operated factory in the United States.

Small tubes, tappets, and roller guides were manufactured at Plant J, and tool refurbishment for all of United Aircraft was completed at the site.

At the company's height, it was one of the largest furniture manufacturers on the east coast and supplied Macy's, G. Fox & Co., Saks Fifth Avenue, and other retailers.

The front facade is in the Art Deco Style, while the other three sides are classic New England Mill in design.

At three floors and about 50,000 total square feet, this is the largest building at the site, made of brick, steel and heavy timbers.

In 1833–34, Building #6 was rebuilt and a 50' by 32' three story addition was added to the structure to the north, made of hand-hewn chestnut and oak beams.

Building #6 at 10,240 square feet and three stories plus an attic is currently shaped, but not restored to, how it was during the Civil War and is in the Greek Revival Style.

Built in 1892 of brick and heavy timbers, the building suffered damage both in the 1909 flood and improper modifications in the 1970s.

The dam was intentionally breached in 1978 and was located to the rear of the Bigelow Brook Estates Condominiums.

Water Tower: Constructed in 1925 by Chicago Steel, the 50,000 gallon tank used to feed the sprinkler system at the site.

The turbine is still in place at the site and was uncovered in September 2016, with plans for a historical display/point of interest to be constructed at that location.

1672: John Allyn, Secretary of the Colony of Connecticut, is granted land by the King of England for a sawmill at the site ca.

1789: The wool used to make the suit for George Washington's Inauguration purportedly comes from Buckland's mill.

1875/1902/1923: Building #4 is constructed in phases 1871-1940: Spencer sells his interests back, Hilliard and his successors found and operate the E.E.

The site was used to manufacture aircraft parts during World War II by the Pratt and Whitney Corporation.

2006: Hilliard Mills LLC takes over the main site, which includes Buildings #1, #2 and #4, and begins the restoration efforts.