 In Connecticut, he designed churches in Gothic revival and Italianate styles in Northford (Congregational 1845), Waterbury (St. John's Episcopal Church, 1846), Kent (First Congregational 1849), Plainville (Congregational 1850), and Seymour (Trinity Episcopal, 1858).Perhaps his most significant out-of-state commission was the Morse-Libby House (Victoria Mansion) in Portland, ME, 1857–1860, for Sylvester Ruggles Morse.This large, elaborate Italianate mansion in brownstone is considered one of Austin's best works and has been called "one of the culminating domestic designs of the antebellum years, and of the Italianate villa in general."