Stoneleigh Park (ca 1904) is a fine example of a small, picturesque, upper middle class residential development of the early twentieth century. Planned by H B Tremaine, president of the Aeolian Company, and his cousin, C M Tremaine, it has designed to take advantage of the natural beauty of the site and to preserve a peaceful suburban setting for the homeowners, who were commuting New York executives and affluent Westfield businessmen and civic leaders. Stoneleigh Park continues to reflect the social and economic prominence of its original homeowners, as well as the town's commitment to the upper middle class lifestyle. - NRHP, 19 September 1988