Planning
Planning an Accessible Bathroom: Complete Design Guide
Updated June 2025 — Dimensions, fixtures, and what to specify
The Critical Dimensions
- Turning radius: 60-inch diameter clear floor space for wheelchair turning; this is the single most important dimension in bathroom planning
- Door clear width: 32 inches minimum; 36 inches preferred
- Transfer space at toilet: 18 inches minimum clear space on at least one side of the toilet for lateral transfer from wheelchair
- Knee clearance under sink: 27 inches high, 30 inches wide, 19 inches deep for wheelchair approach
- Shower size (roll-in): Minimum 36”×36”; preferred 60”×30” or larger for power wheelchair
- Counter/sink height: 34 inches maximum for wheelchair reach
Fixture Selection for Accessibility
Toilets
ADA-height toilets are 17–19 inches from floor to seat (vs. standard 15 inches). This height makes standing up significantly easier for people with limited lower-body strength or balance issues. If replacing the toilet is not in budget, a raised toilet seat extension provides similar benefit at $25–$80.
Shower
For a roll-in shower: curbless entry (zero threshold), 60”×30” minimum, linear drain along one wall (allows level floor approach), fold-down teak or tiled bench, handheld showerhead on adjustable slide bar, pressure-balance valve (prevents scalding if someone leans on controls), and grab bars on all three walls.
Sink
Wall-mounted sink (no cabinet below) allows knee clearance for wheelchair approach. Insulate hot water pipes under sink to prevent burns for users with limited sensation. Lever or touch-style faucet handles. If a cabinet is preferred, a pull-out base cabinet section with rollout drawers maintains accessibility at lower cost than full wall-mount.
Flooring
Matte or textured ceramic/porcelain tile, or luxury vinyl plank with slight texture. Small-format tile (mosaic or 4”×4”) in the shower creates more grout lines, which provides more traction than large-format smooth tile. Heated floor can be valuable for temperature-sensitive users. Non-slip bath mat (secured, not loose) outside shower only.
Lighting
Vanity lighting at face level (not overhead only) reduces shadows. Motion-sensor nightlight for nighttime use. Rocker or paddle-style light switches at 42–48 inches from floor.