The company's early 20th-century factories, located in Thompsonville, Connecticut, were listed on the National Register of Historic Places in 1983.

On nearly 23 acres (9.3 ha) of land stand seven large brick buildings, dating from about 1895 to 1928, the height of the company's operations in Thompsonville.

Buildings range in height between one and four floors, and are built in a vernacular industrial Italianate style.

Built in part by mergers with other makers, it produced virtually every style of carpeting imaginable, and was thus able to achieve a dominant position in the industry.

[2] During its period of growth, the company built a significant amount of worker housing in the areas north and east of the plant; these are the major portion of the Bigelow-Hartford Carpet Mills Historic District.