Patio homes are different from duplexes in many ways. A simple example is that patio homes are basically two homes attached together at the foundation. They have separate utilities, separate structures with a concrete block fire wall, separate building lots, usually a low maintenance exterior, sodded and sprinkled yards, covered patio, 1400-1600 sq ft, and typically 2-3 bedrooms with 2 bathrooms. Whereas a duplex has to be sold as a whole building, usually one utility service for the building, a double sheetrocked fire dividing wall, maybe low maintenance exteriors with vinyl siding, not typically sodded or sprinkled yards, 2-3 bedroom with 1-2 bathrooms, no covered patio, and typically rented only. Either one can be leased on one side or both sides. However, patio homes will have a higher resale value, because they are considered individual homes.