As it adds to the undivided share of land, that is the calculated undivided share of land plus the area of the car park in Sq. The undivided share of land = (Area of the apartment owned / total area covered by all the apartments) * Total area of the gated complex project. Common Areas & Amenities: Holders who have undivided shares usually have shared ownership of the shared areas, facilities, and amenities within the property.