Green Street Realty is a privately held real estate investment and property management firm headquartered in Champaign, Illinois. Founded in 2002, the company began as a local property management operation and has grown into one of the largest residential and commercial landlords in Champaign County. The firm's core business centers on the acquisition, development, leasing, and management of multifamily and mixed-use properties, with a particular focus on student housing near major university campuses. Green Street Realty manages over 3,000 residential rental units, including more than 5,500 student housing beds primarily located near the University of Illinois at Urbana-Champaign. The company also oversees more than 200,000 square feet of retail and office space, along with a portfolio of single-family homes and market-rate apartments. Green Street Realty operates its own development arm, SUB 4 Development Company, which handles construction and project delivery before transitioning assets to Green Street Realty for leasing and management. In 2020, the firm expanded its geographic footprint with development projects in Lafayette, Indiana, Ann Arbor, Michigan, Colorado Springs, Colorado, and Phoenix, Arizona. The company's top markets include Champaign-Urbana, Charleston, and Decatur, Illinois, with heavy exposure in university-adjacent areas. Asset classes of focus include student housing, multifamily, and retail/office properties. As of May 2026, the firm acquired the Academy Campustown portfolio, adding 171 units and 398 beds, bringing its University of Illinois campus portfolio to nearly 6,000 beds.