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- Greeneville Dam (1829) : The Shetucket River was first dammed in 1829, by William P. Greene and the Norwich Water Power Company. However, the currently existing hydro-power generation system in the district mostly dates from 1882. The system includes the present dam, gatehouse and head gates, a power canal, and a number of ancillary structures. The power canal, completed in 1828, was the first industrial power canal in Connecticut. The dam was originally constructed of granite rubble with dressed granite aprons with rubble-stone abutments. After a flood in 1886, the collapsed middle section was rebuilt with gravel filled timber cribbing.
- First Congregational Church (1834) : 143 Prospect Street : The first institutional building in the district was the 1834 Greek Revival-style Congregational Church, which once faced Central Avenue. In 1867, when it was turned around to face Prospect Street, the building was literally cut in half and two additional bays inserted in the long elevations
- Camp, Hall & Company (1835) : 3 Fifth Street : The manufacture of paper in Greeneville began in 1835 with the Camp, Hall & Company. The company was reorganized as the Chelsea Paper Company in 1867 and its facilities were expanded. By 1870 the plant contained 19 paper making machines. It remained in business under this name until 1890, producing an average of 30 tons rag stock per day. The company employed 200 men and 100 women. Chelsea Paper Company was reorganized as the Uncas Paper Company in 1893.
- Shetucket Company (1840) : 385 North Main Street : The first of the textile mills in the district was built by the Shetucket Company in 1840. William P. Greene formed the Shetucket Company from the failed Quinebaug Company. The company’s cotton mills were major manufacturers of unfinished cotton cloth.
- Norwich Bleaching, Dyeing & Printing Co. (1840) : 485 North Main Street : This company, locally known as the “Bleachery” produced finished cotton cloth using cloth made by the Shetucket Company. At its peak the Bleachery had at least 20 buildings and employed 400 people. Hugh Henry Osgood was its President in 1898.
- First St. Mary’s Church (1843) : 200 North Main Street : Father James Fitton’s dream of a church for his parish was fulfilled in 1843, when the first Church of St. Mary, a wood-frame building of the Greek Revival style, was erected. It was the first Roman Catholic church in eastern Connecticut, it also served Catholics from the surrounding communities of Voluntown, Baltic, Taftville, Jewett City, Yantic, and Preston.
- The Connecticut Company (1905) : 385 Central Avenue : The office and Greeneville Trolley Barn were essential buildings used the Norwich trolley system in the early 1900s. The trolley system in the Norwich area provided locals the opportunity to easily travel among all Norwich neighborhoods.
- St. Mary’s Catholic Church (1915) : 70 Central Avenue : A Gothic Revival granite edifice with rose window. A bell tower, erected in 1921, stands next to the Tudor Revival rectory that was built in 1909.
- St. Nicholas Orthodox Church (1915) : 33 Convent Avenue : Officially known as the St. Nicholas Russian Orthodox Greek Catholic Church, the building displays a characteristic onion dome. The rectory next door was built in 1920. Although most houses on this street were built in the same period, none of the Greeks lived nearby. Typically, they first lived in boarding houses or tenements or rented small houses on the periphery of the district.