The main difference between single-family homes and semi-detached houses is that the latter share at least one wall with another home. Townhomes, duplexes and rowhouses are among the most common types of homes that are semi-detached. While single-family homes can have one floor or multiple levels, semi-detached homes often have a smaller footprint and are more likely to have multiple floors to maximize the living space. #sandiegohomes #homes #condos #highrise