Positioned in the heart of San Luis Obispo's sought-after Railroad District, this exceptional multi-unit property presents a rare investment opportunity just moments from Meadow Park, Hawthorne Park, and Downtown San Luis Obispo. Situated on a generous 8,980± square foot street-to-street lot, the property offers three separate residences with strong income potential and flexible living options. The front residence at 523 Branch Street features 3 bedrooms and 1 bathroom, highlighted by a welcoming covered front porch, mature shade trees, and a spacious front yard. Inside, the open-concept living area creates a comfortable flow, while the kitchen includes convenient in-unit laundry. Tucked behind the main home are two additional units, 520 South A & B, both built in 1989. Each unit offers an open-concept lower level with a pass-through kitchen window to the living room and direct access from the dining area to a private yard space. Upstairs, you'll find a generously sized bedroom, full bathroom, and versatile loft area ideal for a home office or additional living space. Off-street parking is available in front of the units. With its prime central location, large lot, and three-unit configuration, this property offers an outstanding opportunity for investors, owner-occupants, or those seeking rental income in one of San Luis Obispo's most desirable neighborhoods.