A condominium is a single unit of real estate—usually a home or residence—in a multi-unit residential development in which each owner of a unit has both a separate ownership interest (often everything inside the front door)—and a common ownership interest (with other unit owners) in the common areas of the property outside the front door—such as roofs, hallways, driveways, walkways, stairways, stucco, brick, paint, stone, and landscaping.

A condominium development is usually governed by a homeowners’ association (HOA) through its board of directors, elected by the homeowners as provided by the HOA’s declaration and bylaws. Unit owners or homeowners in the association are required to pay monthly HOA dues for the maintenance and repair of the common areas of the property and its insurance.

In Arizona, condominiums are regulated under the Arizona Condominium Act (Arizona Revised Statutes, Title 33, Chapter 9). This law outlines the creation, alteration, and termination of condominiums, as well as the management and operation of the condominium association. Each condominium owner has an individual ownership interest in their unit and a shared interest in the common elements of the property, such as lobbies, roofs, and other amenities. The condominium association, typically managed by a board of directors elected by the unit owners, is responsible for the upkeep of these common areas. Homeowners are required to pay association fees, also known as HOA dues, which contribute to the maintenance, repair, and insurance of the common elements. The association's declaration and bylaws, which must comply with state law, govern the rights and responsibilities of the unit owners and the association's board of directors.