Income-producing side-by-side duplex offering rare three levels of living space per unit, ideal for investors or owner-occupants. Excellent house-hacking opportunity - live in one unit while generating rental income from the other. Current rents are below market value, reflecting long-term, high-quality tenants and providing future upside potential. Both units are currently occupied, with tenants interested in remaining. Tenant is responsible for water. Each unit features 3 bedrooms, 2 full bathrooms, plus a third-floor bonus room, enhancing rental appeal and flexibility. The main level includes a living room, dining room, and open-concept kitchen. The side-by-side configuration minimizes shared walls, offering increased privacy and reduced noise transfer. Separate utilities for each unit include electric, furnace, central A/C, and water heater. New central A/C installed in July 2022. Recent improvements include windows, roof, gutters, soffits, and fascia (2022). Newer appliances (2025) installed at 12 N Park Ave, sewer line professionally addressed (2025), and units have been well maintained, helping minimize near-term capital expenses. The property features strong curb appeal, two separate private driveways providing ample parking, and full unfinished basements for each unit. Located in a quiet residential setting with convenient access to restaurants, major highways, Gurnee Mills, Six Flags, Wisconsin access, downtown Chicago, casinos, hospitals, city hall, police station, and just steps from Ray Bradbury Park. Rare opportunity offering strong rental demand, flexibility, and long-term investment potential.