Diamond Properties is a privately held commercial real estate investment and property management firm headquartered in Mount Kisco, New York. Founded in 1995, the company operates a value-add investment strategy focused on acquiring properties with potential for improvement through hands-on property management, market repositioning, and capital upgrades. The portfolio spans 16.6 million square feet across 13 states. Industrial assets now represent 71% of the portfolio by dollar value, with the balance comprising office, retail, hospitality, medical, and land holdings. The total portfolio value exceeds $1.3 billion. In 2024, Diamond Properties added 1.4 million square feet through acquisitions in Ohio, North Carolina, Indianapolis, and Florida, while maintaining a 96% occupancy rate. The firm completed a seven-year redevelopment project transforming a former Grand Union warehouse into a multi-use property anchored by an 85,000-square-foot ShopRite supermarket in Mount Kisco. Diamond Properties emphasizes below-replacement-cost acquisitions targeting properties with below-market rents and above-market vacancy. The company has deployed over 7 megawatts of solar capacity across 24,063 panels and operates affiliated businesses through Diamond Hospitality Group, including Safe Haven Self Storage, Velocity Flexible Workspace, Spins Bowl, and District Social.