Delivered vacant: 1-bedroom-plus-den unit at 3173 21st Street is ready for a new owner to set market rent from day one. 3173-3173A 21st Street is a 4-unit property with three residential apartments and an ADA-compliant ground-floor commercial space. The residential mix includes the vacant 1-bedroom, 1-bath plus den, a 2-bedroom, 1-bath, and a spacious 4-bedroom, 2-bath. The commercial space operates as a hair salon and is leased at $2,799 per month on a 3-year lease signed in October 2025. A shovel-ready 1-bedroom ADU sits on the ground floor, ready for a future owner to finish and add income. With the existing units brought to market rents and the ADU completed, there is roughly 60% upside in the current rent roll. Separate individual water meters and new 400 amp electrical service keep operating expenses low, making this a strong opportunity for an investor seeking stable income with real growth potential.