Wellscroft is a historic estate complex located at Upper Jay in Essex County, New York. It was built in 1903 and is a large and distinguished Tudor Revival–style summer estate home. It is a long,  2 1⁄2-story, rectangular-shaped building with several projecting bays, porches, gables and dormers, a porte cochere and a service wing. The rear facade features a large semi-circular projection. The first-story exterior is faced in native fieldstone. The interior features a number of Arts and Crafts style design features. Also on the property are a power house, fire house, gazebo, root cellar, reservoir, ruins of the caretaker's house and carriage house, and the remains of the landscaped grounds.