Restrooms provide sinks and toilets for large facilities such as warehouses, manufacturing plants, and office buildings. These modular indoor buildings allow facilities to add indoor restrooms to their floor plan faster and with less noise and mess than standard construction. They also can be moved with a forklift as floor plans change. The restrooms ship assembled and include plumbing, plumbing fixtures, electrical outlets, lights, and switches. They need to be connected to electric, water, and sewer lines when installed.