Planning guide

Plan a bathroom that is easier to use over time

Look beyond the shower curb. Entry, maneuvering, transfers, controls, support and assistance all shape whether a bathroom works for its intended users.

The KC Bathroom Additions Team · Updated September 18, 2026

Where should an easier-use bathroom plan begin?

Begin with the actual user and route into the room. Identify how they enter, approach fixtures, bathe, reach controls and leave, including any mobility device or assistance. Then coordinate those needs with structure, drainage and waterproofing. A single feature such as a curbless shower cannot answer all of those questions.

Describe the goals in ordinary language: avoiding a step, room for a walker, seated bathing, help from another person, or making future changes easier. A qualified designer and, where useful, an occupational therapist can help translate those needs into a practical layout. Do not assume a catalog’s accessibility label guarantees suitability for a particular person.

Does every home bathroom need to meet ADA dimensions?

Legal accessibility scope depends on the property and use. The US Department of Justice’s Title III regulation, section 36.207, distinguishes portions of a private residence used exclusively as a residence from areas serving a public accommodation. Other applicable rules or uses may matter. Avoid casually describing an ordinary private bathroom addition as “ADA-certified.”

The Access Board’s toilet-room guide is useful for understanding approach, doors and fixture clearances within its scope. It is not a substitute for identifying the legal requirements and personal needs of your project.

What should be checked before choosing fixtures?

Planning area Useful question
Route into the bathroom Are hallway turns, thresholds and the door manageable?
Door operation Can the user open, close and pass through it from the intended position?
Toilet approach Is there space for the actual transfer or assistance method?
Basin and controls Can the user approach, reach and operate them comfortably?
Bathing Where does the user enter, sit, stand and reach the water controls?
Support Where will appropriate backing and support features be needed?
Assistance Does the plan account for another person when necessary?
Future changes Which support provisions can be included before walls close?
Maintenance Can drains, valves and any pump still be serviced?

Use an actual device and the intended routines during design review. These questions are more useful than a universal square-foot target. The layout guide helps place fixtures, people and access on one drawing.

How does a curbless shower affect the floor?

The shower surface needs a coordinated drainage and waterproofing arrangement while meeting the adjoining floor. Options can include recessing an area where the structure permits it, raising surrounding floor levels or using a transition system. Schluter’s curbless guidance describes those approaches; each must be evaluated in the actual assembly.

Recessing the shower can help align floor levels but raises structural and framing questions. It is not authorization to notch or cut joists to match a tray.

Raising the surrounding floor can avoid one recess while creating a transition at the room entrance. Evaluate that transition as part of the accessible route, not just the shower detail.

For a pumped basement arrangement, the shower trap and inlet height may create another constraint. Discuss the drainage options before promising a flush entry. The plumbing and use-space plans must agree.

What should the construction brief say?

Describe the intended users’ functional needs without including unnecessary medical information. List desired support, seating, controls, lighting and storage, then ask the designer to show where each fits. If future support bars are anticipated, identify backing and documentation before walls are closed. Product selection and attachment still need appropriate design and installation.

State which elements are essential and which can be optional. That helps a contractor price alternatives without removing the feature that motivated the project. Coordinate with the full-bath addition or primary-suite bathroom scope and the complete planning guide.

Frequently asked questions

Is a curbless shower automatically wheelchair accessible?

No. The route, space, transfers, controls and assistance requirements still need to work. The water-control design also remains necessary.

Can we make provisions now and add support features later?

Discuss backing, locations and future product requirements before framing and finishes are complete. Keep documentation so later installers know what was provided; do not assume every wall can support every attachment.

Should I choose products before the layout review?

Gather options and specifications, but resolve the intended use and layout before committing to products that may not work together.

Prepare your bathroom addition brief.

Take a measured sketch, note the unknowns, and put the same scope in front of every contractor.

Create your project brief ↗