In the river town of Croton-on-Hudson, about an hour’s drive from Midtown Manhattan, property is prized for its dramatic water views. Resolution: 4 Architecture (RES4), a New York–based firm founded by Joseph Tanney and Robert Luntz, has designed numerous modern houses in the river and oceanfront towns surrounding the city, but perhaps no location influenced the firm’s work so clearly from first sight as this one. Though the clients, a retired couple seeking an escape from Manhattan, had approached RES4 to design a prefabricated vacation house for the property, there was not enough room to truck the modules on the narrow, winding road leading up to the site. So the architects proposed a more conventional construction instead. “Yet the strategies we employed are still similar in terms of organization and efficiency,” says Tanney.