There are usually crypts that have accessibility from either the inside or outside of the building. Plaque markers can be attached to the front of the crypt to mark each space. The cost of each space will include a perpetual care charge. These cost vary greatly depending upon the facility, location of the space and company who owns the facility. All of these considerations should be looked at before deciding to purchase a crypt.
Spaces are usually available for entombment of ashes also.