The Space You Need

The National Kitchen & Bath Association suggests these basic clearances and fixture sizes based on its design parameters and typical code requirements. Always check with your local building department for guidelines.

A minimum clear floor space of 30x48 inches should be provided in front of the lav. Up to 19 inches of the 48-inch floor space can extend under the lav when a knee space is provided. The minimum clear space from the centerline of the lav to any side wall is 15 inches. The height of the sink or vanity should fit the user(s).

Toilets and Bidets
Most codes require at least 15 inches (measured from the center of the toilet) from any side wall or obstruction and not closer than 30 inches center to center to any other sanitary fixture. (The NKBA actually recommends 32 inches.) There should be at least 24 inches of clear space in front of a toilet or bidet.

While there are no code requirements for tub size, minimum clear floor space alongside a bathtub should be at least 60 inches long (the length of a standard tub) and 30 inches wide. Always allow clear space for access to plumbing and/or whirlpool motors.

Enclosed Showers
While the NKBA recommends a minimum usable interior wall-to-wall dimension of 34 inches, 32 inches is allowable. The Uniform Building Code, which is used on the West Coast, requires that all showers, regardless of shape, have a minimum finished interior of 1,024 square inches, with an interior circular diameter of at least 30 inches.
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