Income-producing side-by-side duplex offering a rare three levels of living space per unit, ideal for investors or owner-occupants. A strong house-hacking opportunity-live in one unit while renting the other to offset your mortgage. Rents are below market, as the landlord prioritized long-term, high-quality tenants, creating clear upside potential. Both units are currently occupied, with tenants willing to stay. Each unit features 3 bedrooms, 2 full baths, plus a third-floor bonus room, maximizing rental appeal. The main level includes a living room, dining room, and open-concept kitchen. The side-by-side layout minimizes shared walls, offering enhanced privacy and reduced noise transfer between units. Separate utilities for each unit include electric, furnace, central A/C, and water heater. New central A/C installed July 2022. Recent improvements include windows, roof, gutters, soffits, and fascia (2022). 12 N Park Ave, Newer appliances (2025) have been installed, the sewer line was professionally addressed (2025), and the units have been well maintained throughout, minimizing near-term expenses. The property offers great curb appeal, ample parking with private driveways, and full unfinished basements for each unit. Located in a quiet residential setting with easy access in and out, yet conveniently close to restaurants, major highways, Gurnee Mills, Six Flags, Wisconsin access, downtown Chicago, casinos, hospitals, city hall, police station, and steps from Ray Bradbury Park. A rare opportunity offering strong rental demand, flexibility, and long-term investment upside.