Single Room Occupancy (SRO) is a form of housing that is typically aimed at residents with low or minimal incomes, or single adults who prefer a minimalist lifestyle. SRO units are rented out as permanent or primary residences to individuals within a multi-tenant building where tenants share a kitchen, toilets, or bathrooms. SRO units range from 7 to 13 square meters (80 to 140 sq ft) and are the least expensive form of non-subsidized rental housing. In some instances, contemporary units may have a small refrigerator, microwave, or sink. SROs are a form of affordable housing, in some cases for formerly or otherwise homeless individuals. SRO housing can be a great investment for commercial real estate investors, providing a steady stream of income, potential tax benefits, and a way to provide affordable housing in areas with high demand.