Add 6x8-foot bathroom over crawlspace with poured concrete walls. Use cultured-stone vanity top with molded sink; standard chrome faucets; 30x60-inch white fiberglass tub/shower with ceramic tile surround; single-lever temperature and pressure-balanced faucet; white low-profile toilet; general and spot lighting; electrical wiring to code; mirrored medicine cabinet; linen storage closet or cabinet; painted trim; ceramic tile floor.