Welcome to 553 South Park Avenue, a remarkable piece of Buffalo history originally commissioned in 1894 by a prominent sea merchant and ideally located along the South Park corridor in the heart of the revitalizing First Ward. Offering over 4,000 square feet, this unique two-unit property blends historic character, flexible mixed-use potential, and exceptional storage. Each apartment features 3 bedrooms, formal living and dining rooms, a full bath, and abundant original charm. Historic details include six original pocket doors, soaring 10-foot first-floor ceilings, quarter-sawn oak woodwork, ornate fireplace surrounds, and preserved period craftsmanship throughout. The first-floor apartment offers custom maple cabinetry, dishwasher, electric range, refrigerator, and a parlor highlighted by an original fireplace with glazed tile surround. The upper apartment features a butler's pantry, clawfoot tub, elegant onyx marble fireplace, emerald glazed tile fireplace, and access to a private second-story deck. Two storefront-style spaces at the front of the building provide outstanding flexibility for offices, studios, workshops, storage, hobby space, or potential commercial uses. The finished third floor offers additional rooms and bonus space for storage, work, or expanded living arrangements. Exterior features include maintenance-free vinyl siding, architectural roof, a large attached garage/workshop, and a detached 3-car garage with rare brick-laid flooring. The basement provides extensive storage and workshop areas with built-in workbenches and fixtures. Conveniently located minutes from Canalside, downtown Buffalo, waterfront attractions, restaurants, and ongoing First Ward redevelopment, this rare property offers historic elegance, income potential, commercial flexibility, and exceptional storage opportunities.