A small private group home: Is deemed conclusively a single–family dwelling; and Is permitted to locate in all residential zones. A large private group home is deemed conclusively a multifamily dwelling and is permitted to locate in zones of similar density. A private group home is not subject to any special exception, conditional use permit, or procedure that differs from that required for a single–family dwelling or a multifamily dwelling of similar density in the same zone. A general zoning ordinance that conflicts with the provisions of this section is superseded by this section to the extent of the conflict.