Bathroom Layout Guidelines and Requirements

As the official partner of the National Kitchen & Bath Association (NKBA), Kitchen and Bath Ideas magazine endorses the following guidelines for bathroom planning.

The NKBA developed the bathroom planning guidelines to provide designers with good planning practices that consider users' typical needs. A committee of experts in bathroom design reviewed relevant research, lifestyle and design trends, and model building code requirements to ensure the guidelines promote the health, safety, and welfare of consumers.

The guidelines are used for academic and educational programs in bathroom design, evaluation of bathroom plans, and testing the competencies of designers seeking certification.

Bathroom Planning Guideline 1: Door Entry
Recommended: The clear opening of a doorway should be at least 34 inches wide. This would require a minimum 2-foot 10-inch door.

If the existing structure precludes changing the opening, then a minimum 2-foot door in allowable.

Bathroom Planning Guideline 2: Door Interference
Recommended: No entry or fixture door should interfere with one another and/or the safe use of the fixtures or cabinets.

Bathroom Planning Guideline 3: Ceiling Height
Code Requirement:

• Bathrooms shall have a minimum floor-to-ceiling height of 80 inches over the fixtures and at the front clearance area for fixtures.
• A shower or tub equipped with a showerhead shall have a minimum floor-to-ceiling height of 80 inches above a minimum area 30x30 inches at the shower head.

Bathroom Planning Guideline 4: Clear Space
Recommended: Plan a clear floor space of at least 30 inches from the front edge of all fixtures (i.e., lavatory, toilet, bidet, tub, and shower) to any opposite bath fixture, wall, or obstacle.

Code Requirement:

• A minimum space of at least 21 inches must be planned in front of lavatory, toilet, bidet, and tub.
• A minimum space of at least 24 inches must be planned in front of a shower entry.