Abstract: Apparatus and associated methods relate to an autonomous modular bathroom facility configured to detect a bathroom user exited the bathroom, determine no user remains in the bathroom, lock the door, and automatically clean the bathroom. In an illustrative example, automatic cleaning may be triggered in response to detecting a user unlocked and exited the bathroom. The bathroom facility may lock the door and initiate the cleaning process based on determining the bathroom is not occupied. For example, some embodiments may determine the bathroom is unoccupied when a user exits the bathroom without another entering, based on bathroom occupancy determined as a function of a sensor. The sensor may include, for example, one or more weight, movement, heat, or other type sensor. The door may be locked when the bathroom is unoccupied, for example, permitting the bathroom to be safely cleaned.