 In 1830, Young opened his own office in Burlington, Vermont, a trade center growing fast since the 1823 opening of the Champlain Canal which connected Lake Champlain with the Hudson River and New York City.Here he designed the 1832 St. Paul's Church in the Gothic Revival style.His first monumental work was the Second Vermont State House, a cruciform Greek Revival structure built between 1833 and 1838, which combined a Doric portico modeled on the Temple of Theseus in Athens, with a low saucer dome inspired by the Pantheon in Rome.