A condominium project is one of the four types of CIDs that are considered common interest developments in Civil Code section 4100. A condominium project consists of “condominiums.” A condominium is a form of land and property ownership in which the owner holds legal title to a three-dimensional space that may be filled with air, earth, water, construction materials or virtually any other material. The three dimensional spaces are described on a recorded document known as a condominium plan. A condominium also includes an ownership in the common area that is shared with other condominium owners. The ownership maybe expressed as a fraction or a percentage of the common area parcel or parcels. See Civil Code section 4125.