There are several accessibility standards used across North America. The most relevant for shower design include:
Each of these standards exists to ensure that spaces are either fully accessible or adaptable for future accessibility needs.
All accessible shower dimensions are based on clear interior finished space. This means:
This is one of the most important aspects of compliance. If the finished interior space is undersized, the installation will not meet code—even if the unit is labeled correctly.
Compare transfer, roll-in, and barrier-free shower requirements across ADA, Title 24, and CSA B651.
2010 ADA Standards for Accessible Design (United States)
36″ × 36″
minimum clear interior
Designed for side transfer from wheelchair
30″ × 60″
minimum clear interior
Allows direct wheelchair entry
½” max
from finished floor to top of threshold
California Building Code
36″ × 36″
clear interior
30″ × 60″
clear interior
½” max
height
All measurements must be verified at the finished interior level, consistent with ADA methodology.
Canadian Standards Association
1500 mm × 900 mm
minimum clear interior (≈ 60″ × 36″)
13 mm max (½”)
Must be beveled if raised
Accessible shower design is about more than meeting minimum dimensions. A compliant bathroom must consider clearance, usable space, and long-term functionality.
Incorrect sizing, improper thresholds, or misunderstanding measurement methods can lead to:
If your project must meet multiple standards (U.S. and Canada), the most effective approach is:
clear interior space
barrier-free whenever possible
This approach:
| Standard | Shower Type | Dimensions | Threshold |
|---|---|---|---|
| ADA / Title 24 | Transfer Shower | 36″ × 36″ | ½” max |
| ADA / Title 24 | Roll-In Shower | 30″ × 60″ | ½” max |
| CSA B651 | Barrier-Free (Roll-In) | 1500 × 900 mm (60″ × 36″) | 13 mm max |
Accessible shower design starts with correct interior dimensions and proper thresholds—the foundation of compliance and long-term usability.
Our systems are designed around true clear interior dimensions, ensuring compliance where it matters most—inside the shower. We support:
Project Types
Standards Met
Our team can help you navigate accessibility requirements and identify the right shower systems for your project. Contact us for specification support and compliance guidance.
