Muss Development LLC is a Forest Hills, New York-based family-owned real estate development and investment firm founded in 1906. It deploys family-backed capital into long-term ownership, development, redevelopment, acquisitions, operations, leasing and management of real estate assets, with a focus on residential communities, retail centers, office, mixed-use, hotel, commercial and industrial properties. The firm focuses on U.S. real estate opportunities, especially New York City and the East Coast, with stated deal sizes of $20M-$100M.