Oulagisket or "Lisburne Grange," also known as the Sloan Estate, is a historic estate located in Garrison, New York, in Putnam County. It consists of the main house and carriage house, superintendent's cottage, barns (1916), and carpenter's shop. The main house is a 2 1⁄2-story stuccoed masonry building in the Italianate style. It has a large 2-story service wing. The carriage house is a 2-story masonry building with a gable roof.