The district "is a picturesque and unique exemplar of Connecticut's resort and country estate period.

No other town in the state contains such an impressive and cohesive ensemble of stylish summer houses, the major contributors to a district that is further enhanced by the quality of its well-integrated institutional architecture and the exceptional integrity of its historic setting.

Its main building is a converted house, built in 1792, once belonging to Col. Thomas Grosvenor (1744-1825).

It has a large addition and alterations by Thomas Skelton Harrison (1837-1919), designed by Guy King of Philadelphia.

The Colman estate house dates from 1928. Notable properties in the district include: