Muss Development began in 1906 as a family real estate business and has remained under family ownership across generations. The company develops, owns, invests in, and leases commercial, residential, industrial, retail, and hotel properties, with work spanning New York City and additional East Coast markets. Its portfolio includes office, mixed-use, and residential projects, along with retail centers and repositioned buildings that support long-term tenancy. Muss Development continues to operate as a New York real estate firm with a long-running presence in property development and management.