New Castle Hotels & Resorts is a hotel management company that operates a portfolio of hotels and resorts in the United States and Canada. The company was founded in 1980 and is headquartered in Bethesda, Maryland. New Castle Hotels & Resorts provides a range of services to its hotel owners, including operations management, sales and marketing, revenue management, and accounting. The company's portfolio includes a variety of hotel brands, including Marriott, Hilton, and Sheraton. New Castle Hotels & Resorts is committed to sustainability and has implemented a number of environmentally friendly practices at its properties.