What feature distinguishes a condominium project?

A condominium project is primarily characterized by the shared ownership aspect that involves multiple units within a single building or complex. In a condominium, individual owners hold titles to their specific units while collectively owning common areas such as hallways, gardens, and amenities like pools or gyms. This shared ownership model allows residents to enjoy both private space and shared facilities, creating a distinct lifestyle that differentiates condominiums from other types of properties, such as single-family homes or rental complexes.

The other choices do not capture the essence of a condominium. For example, single-family homes are not representative of condominiums, since they typically do not involve shared ownership of land and community amenities. Commercial spaces might also feature various ownership structures, but they do not align with the residential aspect of a condominium. Lastly, mandating only rental agreements does not define a condominium either, as many condominiums are owner-occupied rather than rented, highlighting the flexibility of ownership in this type of residential project.