Positioned on a prominent downtown corner, 58 Ontario Street presents a rare opportunity for owner-occupiers, investors, or live-work users to acquire a fully vacant 3,528 sq. ft. architecturally distinctive landmark building with exceptional zoning flexibility (C5-92) in the downtown core. Zoning permits a broad range of residential and commercial uses, allowing the property to function as entirely commercial, entirely residential, or mixed-use, while benefiting from the sought-after downtown parking exemption. Currently configured with a beautifully appointed 1,450 sq. ft. commercial main floor and two self-contained residential apartments above, the property offers three income streams with potential gross annual income of approximately $75,000 based on projected market rents, with additional upside through commercial leasing or owner occupancy. Showcasing original millwork, pocket doors, stained and leaded glass, refinished hardwood flooring, and other period details rarely found in commercial properties today, the building seamlessly combines historic character with modern functionality. Additional features include updated washrooms and kitchens, five ductless splits, full basement storage, separate hydro meters, five on-site parking spaces (2 tandem). Located in the heart of Downtown St. Catharines' heritage district, steps from the Performing Arts Centre, Meridian Centre, Brock University's Marilyn I. Walker School, restaurants and cafA(C)s, the area continues to benefit from ongoing residential intensification and commercial reinvestment, supporting long-term demand for both residential and commercial space.