There are multiple options in the US, the one in the article is only one type. - you can own a “share” in a building where you have exclusive use of a part of

There are multiple options in the US, the one in the article is only one type. - you can own a “share” in a building where you have exclusive use of a part of it (tenancy in common in CA) - you can own a unit within a multi-unit building (the entire building be a defined piece of real estate) - you can own a legally separate unit that is a stand alone piece of real estate