Row housing has also become a popular alternative in which three or more units are joined together by common party walls. Each townhouse unit typically contains a full basement, main level living area and upper level for bedrooms. Many variations exist in the marketplace. Town houses are attractive from a developer’s perspective given higher densities available. Two examples are illustrated. Townhouses are normally grouped in sets of three to six units. Townhouses are either offered as freehold (the owner holds title to the structure and the land) or condominium (the unit owner owns the structure as defined in the condominium documentation) and shares the land as a common element with other unit owners.