If you're planning a bathroom that's easier to use for someone with limited mobility or a wheelchair, the ADA Standards are one of the most detailed published sets of measurements to work from. This guide pulls the key bathroom numbers from the official 2010 ADA Standards for Accessible Design, quoted exactly, and shows how they apply when you shop for toilets, sinks, grab bars, showers and mirrors.
The ADA's design rules cover public places, not private homes. The U.S. Access Board, the federal agency that develops the accessibility guidelines behind the standards, puts it plainly: "The ADA does not apply to individually owned or leased housing in the private sector not used as a public accommodation, including single family homes, condominiums, or apartments." It adds that many types of multi-family housing are covered by the Fair Housing Act instead, and that "facilities not subject to the ADA Standards may still be subject to state or local access codes" (U.S. Access Board).
So if you're remodeling your own home, you're not required to follow these numbers. They're simply a well-tested reference for anyone planning an accessible bathroom. If you're building or remodeling a business, rental or other public space, check with your local building department about what applies to you.
All quotes below are from the 2010 ADA Standards for Accessible Design (U.S. Department of Justice), with the section number for each.
| What | What the 2010 ADA Standards say | Section |
|---|---|---|
| Toilet seat height | "17 inches (430 mm) minimum and 19 inches (485 mm) maximum measured to the top of the seat" | 604.4 |
| Toilet position | Centerline "16 inches (405 mm) minimum to 18 inches (455 mm) maximum from the side wall or partition" | 604.2 |
| Space around the toilet | "60 inches (1525 mm) minimum measured perpendicular from the side wall and 56 inches (1420 mm) minimum measured perpendicular from the rear wall" | 604.3.1 |
| Grab bar height | "33 inches (840 mm) minimum and 36 inches (915 mm) maximum above the finish floor measured to the top of the gripping surface" | 609.4 |
| Side-wall grab bar | "42 inches (1065 mm) long minimum, located 12 inches (305 mm) maximum from the rear wall and extending 54 inches (1370 mm) minimum from the rear wall" | 604.5.1 |
| Rear-wall grab bar | "36 inches (915 mm) long minimum" | 604.5.2 |
| Grab bar size and spacing | Round bars "1 1/4 inches (32 mm) minimum and 2 inches (51 mm) maximum" in diameter; "the space between the wall and the grab bar shall be 1 1/2 inches (38 mm)" | 609.2.1, 609.3 |
| Toilet paper dispenser | "7 inches (180 mm) minimum and 9 inches (230 mm) maximum in front of the water closet measured to the centerline of the dispenser" | 604.7 |
| Sink height | "The front of the higher of the rim or counter surface 34 inches (865 mm) maximum above the finish floor" | 606.3 |
| Knee space under the sink | The zone "between 9 inches (230 mm) and 27 inches (685 mm) above the finish floor," at least "30 inches (760 mm) wide" | 306.3.1, 306.3.5 |
| Floor space at a fixture | "30 inches (760 mm) minimum by 48 inches (1220 mm) minimum" | 305.3 |
| Turning space in the room | A circle "60 inches (1525 mm) diameter minimum," or a T-shaped space within a 60-inch square | 304.3.1, 304.3.2 |
| Transfer shower | "36 inches (915 mm) by 36 inches (915 mm) clear inside dimensions" | 608.2.1 |
| Roll-in shower | "30 inches (760 mm) wide minimum by 60 inches (1525 mm) deep minimum," with a 60-inch-wide entry | 608.2.2 |
| Mirror over a sink | Bottom edge of the reflecting surface "40 inches (1015 mm) maximum above the finish floor" | 603.3 |
Seat height is the number to compare, and it's measured to the top of the seat, not the bowl rim. Brands use names like "Universal Height," "comfort height" or "chair height" for taller toilets, but the measured height on the product page is what matters. In our catalog, 158 toilets list a seat height, and 129 of them fall between 17 and 19 inches (median 17.19 inches). Some manufacturers, including TOTO, state on many listings whether that model is ADA compliant, and some listings say it isn't, so check the listing itself. For more on choosing and installing a toilet, see how to install a one-piece toilet, or browse toilets.
Grab bars should be anchored to something solid, like wall studs or blocking added behind the wall, to hold a person's weight. The ADA heights above (33 to 36 inches to the top of the bar) are a good starting point for placement. Our guide on how to install grab bars walks through the basics; if you're remodeling, adding blocking now makes it easy to add bars later.
The ADA's 34-inch maximum is measured to the front of the rim or counter, whichever is higher. That matters with vessel sinks, which sit on top of the counter and raise the rim height; see vessel sink installation for more. For someone who uses a wheelchair, the space under the sink matters too: the knee space in the table above is easiest to get with a wall-mounted sink or an open vanity rather than a cabinet with doors all the way down. Browse sinks and faucets.
A transfer shower (36 by 36 inches) is designed for someone who moves from a wheelchair onto a shower seat; a roll-in shower (at least 30 by 60 inches) lets a wheelchair roll right in. If a tub is a better fit for your home, a walk-in tub is another option; our walk-in tub buying guide covers step-in heights, seat heights and door types, and walk-in tub vs. shower compares the two. Browse showers.
For a mirror over a sink or counter, the ADA's limit is on the bottom edge of the glass: 40 inches maximum above the floor. The Standards' advisory note adds that "the top edge of mirrors should be 74 inches (1880 mm) minimum from the floor or ground," so the mirror works for people who are standing as well as people who are seated. See our guide to choosing the right size mirror.
When a product listing says "ADA compliant," that's the manufacturer's statement about the product itself. Whether a whole bathroom meets the ADA depends on how everything is installed: the heights, clearances and positions above. If you need a bathroom to meet the ADA, have your design checked by your contractor or local building department.
All ADA measurements are quoted from the 2010 ADA Standards for Accessible Design (U.S. Department of Justice) and match the U.S. Access Board's copy. Catalog figures reflect toilets listed in our store on September 27, 2026, using each manufacturer's published specifications.
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