Situated at the corner of Church St. and Cedar St. sits the old Naugatuck Main Post Office. Completed in 1917 for $50,000. The building reflects early 20th-century design trends influenced by the Public Buildings Act of 1913, merging Mediterranean style with civic elegance. The Spanish Colonial Revival post office echoes the Henry Bacon-designed train station at the opposite end of Cedar St.

Constructed of buff brick with terra-cotta trim and marble accents, the structure features a hipped red tile roof and round-arched openings, hallmark elements of the Spanish Colonial style. Its arcaded facade, flanked by shallow pavilions, enhances the building’s symmetry and charm. The building was designed by James A. Wetmore, Acting Supervising Architect of the U.S. Treasury.

The Naugatuck Main Post Office operated from 1917 until 2000, when the current post office on Water Street was completed.

The Ensign-Carrington house, popular for the time, is a Norman Style home built in the 1850s and located near Church Street and Cedar Street. The house was moved for the construction of Cedar Street around 1906 and was demolished in July of 1966 for the construction of the Post Office on Church Street. 

Designated as part of the Naugatuck Center Historic District on July 30, 1999, the site was officially listed on the National Register of Historic Places on January 12, 1986.