Under-Stairs Bathroom with Shower

Small space bathroom design has gotten complicated with all the plumbing requirements, ceiling height challenges, and fixture sizing flying around. As someone who has built bathrooms in every tight space, I learned everything there is to know about utilizing under-stair areas. Today, I will share it all with you.

Space Assessment

Probably should have led with this section, honestly—measure carefully before planning:

• Minimum head height (6’8″ for shower area)
• Width for fixtures and movement
• Access for plumbing and electrical

Layout Strategies

• Place toilet where ceiling is lowest
• Position shower at tallest point
• Use wall-mount sink to save floor space
• Consider pocket or sliding door

Fixture Selection

• Compact toilet (round bowl vs. elongated)
• Corner or wall-mount sink
• Neo-angle or corner shower
• Sliding or hinged glass door

Code Considerations

• Minimum ceiling heights vary by code
• Ventilation requirements
• Electrical GFCI requirements
• Access panel locations