3631 Gustine Avenue Fantastic opportunity in Tower Grove South! This well-maintained classic brick duplex is ideal for an investor, owner-occupant, or multi-generational living. Each spacious unit offers 2 bedrooms and 1 full bath with beautiful hardwood flooring, newer vinyl windows, and charming stained-glass accents. Both units feature eat-in kitchens equipped with ranges, range hoods, and refrigerators, with access to rear balconies overlooking the yard and detached 2-car garage. The first-floor unit offers central air plus optional window units, while the second-floor unit is equipped with window A/C units. Additional features include steam heating systems, updated circuit breaker panels, and a partially finished walk-out lower level offering additional usable space and storage. Recent improvements include updated kitchen flooring, refinished hardwood floors, spot tuckpointing, a newer water heater, second-floor bathtub replacement, fresh interior paint in 2025, and freshly painted rear decks. Both units are currently occupied by members of the owner's family, offering flexibility for the new owner, they may remain after closing or vacate as needed. Conveniently located in Tower Grove South near neighborhood restaurants, shopping, parks, and major thoroughfares. Live in one unit and rent the other, add a solid brick duplex to your investment portfolio, or create a multi-generational living arrangement. A versatile South City property with plenty of possibilities!