An ADA single-user bathroom needs a 60 in turning circle, a 60 × 56 in clear space at the toilet with its centerline 16 to 18 in from the side wall, a 30 × 48 in clear floor at the sink, and a door with at least 32 in of clear opening. Our layout planner’s toilet room that meets all of these is 5 × 9 ft; with a 36 in transfer shower it’s 5 ft 6 in × 10 ft 6 in, and with a 30 × 60 in roll-in shower, 7 ft 6 in square.
The numbers in an ADA bathroom
| Item | What the standard asks for | Section |
|---|---|---|
| Turning space | A 60 in circle, or a T-shaped space within a 60 in square | 304.3 |
| Clear floor at a fixture | 30 × 48 in | 305.3 |
| Door | 32 in clear opening, at least | 404.2.3 |
| Door swing | Not into a fixture’s clear space, except in a single-user room with a 30 × 48 in space beyond the swing | 603.2.3 |
| Toilet centerline | 16 to 18 in from the side wall | 604.2 |
| Toilet clearance | 60 in from the side wall by 56 in from the rear wall | 604.3.1 |
| Toilet seat | 17 to 19 in high | 604.4 |
| Grab bars | 42 in long on the side wall, 36 in on the rear wall, 33 to 36 in high | 604.5, 609.4 |
| Sink | Rim or counter 34 in high at most, knee space 27 in high below | 606.3, 306 |
| Showers | Transfer 36 × 36 in; roll-in 30 × 60 in; alternate roll-in 36 × 60 in | 608.2 |
The ADA Standards apply to public places and commercial buildings; homes often use them as a guide. Each requirement in full: ADA bathroom requirements.
Three ADA layouts, drawn to scale
The brass box is the toilet’s 60 × 56 in clearance and the dotted circle is the 60 in turning space; the green dashed boxes are the building code’s clear spaces. The planner checked each plan at its accessible level as well as at the code.
- Door clear opening: 34 in
- Toilet centerline to the side wall: 18 in
- 60 × 56 in clear space at the toilet: yes
- 60 in turning circle: yes
- Clear floor at the sink: yes
Toilet room: 5 × 9 ft
The toilet sits 18 in from the side wall with its whole 60 × 56 in clearance free of other fixtures. A 30 in wall-hung sink, open below for knee space, stands at the far end, and the turning circle fits between the two. The door swings out, so it never crosses a clear space.
- Good: every check the planner makes passes, on open floor only.
- Watch for: the side wall beside the toilet needs room for a 42 in grab bar, the rear wall for a 36 in one.
- Door clear opening: 34 in
- Toilet centerline to the side wall: 18 in
- 60 × 56 in clear space at the toilet: yes
- 60 in turning circle: yes
- Clear floor at the sink: yes
Transfer shower: 5 ft 6 in × 10 ft 6 in
A transfer shower is the 36 × 36 in kind you slide into from a wheelchair onto a seat. Here it shares the far wall with the sink, and the toilet stands at the door end with its clearance and the turning circle between them.
- Good: 90 in of floor in front of the shower.
- Watch for: a transfer shower needs its own clear floor alongside, a seat and grab bars; the planner doesn’t draw those.
- Door clear opening: 34 in
- Toilet centerline to the side wall: 18 in
- 60 × 56 in clear space at the toilet: yes
- 60 in turning circle: yes
- Clear floor at the sink: yes
Roll-in shower: 7 ft 6 in square
A roll-in shower has no curb, so a wheelchair rolls straight in. The 30 × 60 in shower runs along one wall with the sink beside it, and the toilet’s clearance and the turning circle overlap in the open floor, which the standard allows.
- Good: one wall holds the shower and the sink, so the plumbing stays together.
- Watch for: a curbless floor needs its slope and drain planned with a pro; see curbless showers.
What may overlap, and where the door may swing
- The turning space may overlap the clear spaces at the fixtures, and it may include the knee and toe space under a sink (304.3). The planner counts only open floor, so its rooms come out a little on the safe side.
- The toilet’s 60 × 56 in clearance must be free of other fixtures. The one exception is in a home: a sink may stand in it if the clearance is at least 66 in deep (604.3.2).
- The door may not swing into a fixture’s clear space, except in a single-user room that keeps a 30 × 48 in clear floor beyond the door’s swing (603.2.3). The plans here use doors that swing out.
What the planner checks, and what to confirm
At its accessible level the planner checks the door’s clear opening, the toilet’s centerline, its 60 × 56 in clearance, a 60 in turning circle on the open floor and the clear floor at the sink. It doesn’t check the maneuvering space beside the door, the walls for grab bars, the transfer shower’s clear floor or seat, the heights of mirrors and dispensers, or thresholds and floor slopes. Have an accessibility specialist or your building department confirm a design before you build.
Questions people ask
What is the minimum size for an ADA bathroom?
The standard sets clearances, not a room size. With the toilet clearance, a sink, a 60 in turning circle on open floor and a 36 in door, our planner’s smallest single-user toilet room is 5 × 9 ft. Counting knee space toward the turning circle can make it smaller.
How far should the toilet be from the side wall in an ADA bathroom?
16 to 18 in from the side wall to the toilet’s centerline (604.2).
How much clearance does an ADA toilet need?
A clear space 60 in wide, measured from the side wall, and 56 in deep, measured from the rear wall (604.3.1).
Does an ADA bathroom door have to swing out?
No. It may swing in if it doesn’t cross a fixture’s clear space, or, in a single-user room, if a 30 × 48 in clear floor stays beyond its swing (603.2.3).
How high do ADA grab bars go?
33 to 36 in above the floor to the top of the gripping surface (609.4), 42 in long on the side wall and 36 in on the rear wall (604.5). More in grab bar height.
Sources
- U.S. Access Board: 2010 ADA Standards for Accessible Design: sections 304, 305, 306, 404, 603, 604, 606, 608 and 609
- 2021 International Residential Code, chapter 3 (R307.1 fixture clearances, R305.1 ceiling height) and chapter 27 (P2705.1 fixture spacing, P2708.1 showers), read in Colorado’s adoption without amendments on UpCodes
Checked October 19, 2026. Plans drawn and checked with the BathDraft layout planner; centimeters are converted from inches. This page explains the standard; it isn’t a compliance review.