What is the minimum width of a stall for a non-handicapped water closet?

The minimum width of a stall for a non-handicapped water closet is 30 inches. This measurement adheres to the standards set forth by building codes and accessibility guidelines, ensuring that the stall provides a sufficient space for users to comfortably use the facility. A stall narrower than 30 inches would likely lead to issues regarding usability and accessibility, as it may not accommodate the average user's movements or personal space.

Wider options, such as 31 inches, 36 inches, and 42 inches, may be suitable for other configurations or for handicap-accessible stalls, but the accepted minimum for standard non-handicapped installations is firmly established at 30 inches to maintain a balance of functionality and required space in restroom design.