Bathroom Layout for a Wheelchair User

Why this matters

The bathroom is the room a wheelchair user most needs to manage alone and the room least likely to let them. A typical hall bath of 5 by 8 feet was laid out for someone who stands, turns on their feet and steps over a tub wall. Most of the bathroom jobs that disappoint did good work on the wrong thing first: a new shower in a room the chair cannot turn around in, or grab bars beside a toilet the person cannot pull up next to. This card gives the space figures, explains what each one is for, and sets the order in which a cramped bathroom gets reworked so the first change is the one that makes the later ones usable.

The figures, and what each one is for

The 2010 ADA Standards for Accessible Design are the best dimensional reference for this room and they do not govern a private home. Treat each figure as a starting point that you confirm with the person in their chair. See related: What the ADA Does and Does Not Cover in a Private Home.

• Turning space (304). A 60-inch diameter circle (304.3.1), or a T-shaped space inside a 60-inch square with arms 36 inches wide (304.3.2). This is the space to turn the chair around without a three-point shuffle. The Standards let the turning space include knee and toe clearance under a fixture (304.3), which in a small bath is often what makes it fit.
• Clear floor space (305). 30 by 48 inches (305.3), the footprint of an occupied chair parked to use something. It can be approached forward or parallel (305.5), and which one the person uses decides where it goes.
• Door clear width (404.2.3). 32 inches minimum, measured between the face of the door open at 90 degrees and the stop on the latch side. A 32-inch door slab does not give a 32-inch clear opening; it gives about 30. See related: How to Measure Clear Width and Gain It Without Widening.
• Door swing (603.2.3). In a public toilet room the door may not swing into the clear floor space of any fixture. In a house you are not bound by that, but the reason behind it holds: a door that swings in over the only floor space traps a person who falls against it.
• Lavatory (606). Rim at 34 inches maximum (606.3), with knee clearance at least 27 inches high and toe clearance below (306), and pipes underneath insulated or configured against contact (606.5).
• Toilet (604). Centerline 16 to 18 inches from the side wall (604.2), with a clearance around it at least 60 inches measured from the side wall and 56 inches from the rear wall (604.3.1). Height and transfer are their own subject; see related: How to Set a Toilet for the Way the Person Transfers.
• Showers (608). A transfer shower is 36 by 36 inches (608.2.1); a roll-in shower is at least 30 by 60 inches (608.2.2). Where the water goes in a curbless one belongs to a sibling; see related: Curbless Showers and Where the Water Goes.

Clearances overlap, and that is how a small room works

A beginner adds the clearances up and concludes the room needs to be 10 feet long. They are not used at the same time. The turning circle is used to turn; the toilet clearance is used to transfer; the clear floor space at the lavatory is used to wash hands. In a private home you can let them overlap wherever the person does not need two of them at once, and the floor that belongs to all three is the floor that makes the room work.

What may not overlap is a fixed object. A vanity cabinet with a closed base takes floor away from every clearance it sits on. A wall-hung lavatory with real knee space gives most of that floor back, because the footrests and knees go under it during a turn.

The order to rework a cramped bathroom

The order is set by dependency: each step is only usable once the one before it is done.

1. The door. If the chair cannot get through, nothing inside matters. Gain clear width first (offset hinges, removing the stop, a wider opening), and decide the swing: out into the hall, a pocket door, or a surface sliding door with a pull the person can work. A door that swings in over the clear floor space is the most common reason a renovated bathroom is still not usable.
2. Floor area. Removing the tub is usually the largest single gain in a 5 by 8 room, because the tub and its curb take a 30 by 60 inch strip that a curbless shower can return to the floor. Removing a closed vanity base is the second.
3. The toilet location. Once the floor is known, the toilet goes where the person can approach it from their transfer side with the side wall where they want the grab bar. Moving a toilet is a drain question and often the costliest plumbing move in the job, so settle it before tile.
4. The lavatory. Wall-hung, with knee space, at a rim height measured with the person.
5. Backing everywhere. Before the walls close, block every wall a grab bar could ever go on. See related: Grab-Bar Backing and Load: The Structural Rule.
6. Accessories and controls. Mirror, towel bar, paper holder, shower controls and valve location within the person's reach. See related: Reach Ranges and Control Heights.

Worked example: a 5 by 8 hall bath

The customer is 58, uses a manual wheelchair 25 inches wide and about 42 inches long including footrests, transfers sideways onto a seat from her right, and has good upper body strength. Her bathroom is 60 inches wide by 96 inches long, inside face of finished wall to finished wall.

As found. A tub across the far 60-inch wall, 30 inches deep. A 30-inch closed vanity, 21 inches deep, and a toilet projecting 28 inches, both on the left long wall. The door is a 28-inch slab on the right long wall, swinging in. Measured clear opening: 26 inches. Her chair is 25 inches wide, so she gets through with her knuckles scraping both jambs, and once inside the open door blocks the floor in front of the toilet.

Floor beyond the tub: 96 minus 30 is 66 inches long. Clear width between the toilet front and the right wall: 60 minus 28 is 32 inches, and between the vanity front and the right wall, 60 minus 21 is 39 inches. She cannot turn; she backs out.

Reworked, in the order above.

1. Door: the opening is widened to take a 36-inch door with about 34 inches clear, swinging out into the hall, after checking whether the wall is bearing. See related: How to Widen a Doorway in a Bearing Wall Safely.
2. Tub out; curbless roll-in shower in the same 60 by 30 inch strip. Vanity base out.
3. Toilet moved to the near end of the left wall, against the near short wall, centerline 18 inches from the left wall. She approaches from the open right side and transfers from her right, with the left wall carrying the side grab bar. Beside the bowl, about 34 inches of floor remains on the right, enough for her 25-inch chair alongside.
4. Wall-hung lavatory on the left wall next to the shower, rim at 33 inches after she tried a temporary board at 32, 33 and 34 and chose 33, knee clearance under it.

The plan, not to scale:

  LEFT WALL                    RIGHT WALL
  +-----------------------------+   0 in
  |  ROLL-IN SHOWER  60 x 30    |
  |  curbless, floor slopes in  |
  + - - - - - - - - - - - - - - +  30 in
  |LAV    circle top is 8 in    |
  |knee   from the shower wall  |
  |space                        ] DOOR 34 in
  |       60 in circle          ] clear,
  |                             ] swings OUT
  |       circle bottom at the  |
  |       toilet front, 68 in   |
  | +--+                        |
  | |WC| CL 18 in from left     |
  +-+--+------------------------+  96 in

Does the circle fit? The room is 60 inches wide, so a 60-inch circle needs the full width, which it gets only because the lavatory knee space is open floor at foot level. Lengthwise, the toilet front sits at 96 minus 28, or 68 inches from the shower end. A circle running from 8 to 68 inches fits, using 22 inches of the curbless shower floor (30 minus 8). With a curb at the shower edge, the available length would be 68 minus 30, or 38 inches, and she would be back to backing out. That is the reason the curbless shower and the open lavatory are not upgrades in this room: they are what makes the turn possible.

Where it overlaps. The toilet clearance runs 56 inches from the near wall, from 40 to 96 inches, and the lavatory sits partly inside it. In a public building that would not pass. Here she uses the lavatory and the toilet at different times, and she proved the transfer with the lavatory in place before tile went on. That trial, not the drawing, is what made the overlap acceptable.

What she did in the room before the walls closed. Rolled in, turned a full circle without a three-point turn, pulled alongside the toilet from the right, and reached the lavatory faucet seated. Each was done with the framing open and blocking marked, because a fixture that has to move after tile costs a day.

What would change the layout

A power chair. Power chairs are often longer and some do not turn in 60 inches at all. Measure the person's own chair turning, on a taped floor, before drawing anything; the T-shaped turn (304.3.2) sometimes works where the circle does not.

A caregiver-assisted transfer. Two people need floor on both sides of the toilet, and the 34 inches beside the bowl in this example would be too little for a helper and a chair. The layout is then designed around the helper's position, ideally with the occupational therapist. See related: Working With the Occupational Therapist.

A left-side transfer. The whole plan mirrors: the toilet goes to the right wall, and the door may need to move to keep the approach clear.

References

• 2010 ADA Standards for Accessible Design, sections 304, 305, 404, 603, 604, 606 and 608, used here as a dimensional reference; they bind places of public accommodation and commercial facilities, not a private home.
• See related: The Accessibility Walkthrough With the Person Who Lives There; Bathroom Remodel Reference.
• See related: How to Convert a Tub to a Low-Threshold Shower; Curbless Showers and Where the Water Goes.