Empire Towers I is a Class A, nine-story office building located at 3633 Inland Empire Boulevard in Ontario, California. The property contains approximately 188,612 square feet and is positioned within the Ontario Airport submarket, offering prominent visibility from Interstate 10. Its location provides immediate access to Haven Avenue and convenient connectivity to the I-10, I-15, and SR-60 transportation corridors, supporting access throughout the Inland Empire and Southern California region. Built in 1991 and professionally managed, the building features a card-key security system, reserved parking options, and a parking ratio of 4 spaces per 1,000 square feet. The property's full-service gross lease structure simplifies occupancy costs, while its central location places tenants near Ontario International Airport, regional business centers, hospitality amenities, dining options, and major transportation infrastructure. Empire Towers I offers a corporate office environment designed to support a wide range of professional users seeking accessibility, visibility, and a well-maintained business setting.