A bathroom module includes a shower area that includes a shower head, a control valve assembly, and a drain. The module also includes a toilet area including a toilet assembly and a transition area disposed between the shower area and the toilet area. The module also includes a shower area front wall and a shower area side wall, the shower area disposed along a first side of the shower area front wall and a first side of the shower area side wall. The module also includes a toilet area front wall and a toilet area side wall, the toilet area disposed along a first side of the toilet area front wall and a first side of the toilet area side wall. A grooming area includes a sink assembly that comprises a faucet, and the grooming area is disposed along a second side of at least one of the shower area front wall, the shower area side wall, the toilet area front wall, and the toilet area side wall.