Planning a Bathroom You Can Still Use in Twenty Years
The decisions that make a bathroom usable at eighty cost almost nothing at fifty — if they happen while the walls are open. Here's what to plan for, what the published standards actually say, and what to skip.
Most people do not remodel a bathroom for accessibility. They remodel it because the tile is dated. But the two overlap almost completely, and the difference between a bathroom that works at eighty and one that does not is a handful of decisions that cost very little — if they are made while the walls are open.
Retrofitting the same things later means opening the walls again. That is the entire argument of this page.
The four that matter most
1. A low or absent threshold
Stepping over the side of a tub is the single hardest thing most bathrooms ask of you. A curbless entry asks nothing; a low-threshold entry asks very little. For comparison, the ADA Standards cap the threshold in a roll-in shower at ½ inch — a useful target even in a house where nothing compels it.
Curbless is the better outcome and the harder build — it requires the floor to slope correctly toward the drain and the waterproofing to be right, which on an older foothill home can mean working with a subfloor that was never planned for it. California’s plumbing code also treats a room containing a threshold-less shower as a wet location, so the decision reaches past the shower itself. A low-threshold entry is simpler and gets most of the benefit. We will tell you honestly which your floor supports rather than selling the harder one by default.
The difference between the two is covered in detail in curbless vs low-threshold walk-in showers.
2. Blocking behind the tile
This is the cheapest thing on the list and the one most often skipped.
Solid wood blocking installed between the studs, behind the finished wall, wherever a grab bar might one day go: beside the toilet, at the shower entry, along the shower wall. It costs very little at framing stage. It is invisible when finished. And it means a grab bar can be installed later, properly anchored — instead of opening a tiled wall or relying on a fixture screwed into drywall, which is worse than having nothing because it feels secure until it isn’t.
How much load a bar has to take is the part worth knowing: the ADA Standards require grab bars and their mounting to withstand 250 pounds of force applied at any point. Drywall anchors are not in that conversation.
Ask for blocking even if you want no grab bars now. It is the highest-return decision in this entire article and it changes nothing about how the finished room looks.
3. A bench, or space for one
A built-in bench is useful long before it is necessary — for shaving, for washing a child, for sitting down for a moment. Built in during the remodel it reads as design. Added later it reads as equipment. Where a seat is built in, the code follows it: the waterproof lining has to extend at least 3 inches above the seat surfaces, the same as it does above the dam (CPC §408.7).
A fold-down seat is the other option, and a good one in a small alcove — it disappears when nobody needs it, and in an accessible shower stall the plumbing code expressly permits a fold-down seat to protrude into the 30-inch circle the compartment must otherwise contain (§408.6). For height, the ADA figure is 17–19 inches above the finished floor.
This is not theoretical. On one Auburn conversion we removed the tub and built a low-threshold shower across the alcove with acrylic wall panels, a fold-down seat mounted on solid blocking, a grab bar and a corner shelf — the whole list on this page, in one small hall bathroom:
A real Oakwood job in Auburn. The full write-up lives on our parent site: tub-to-shower conversion with acrylic walls and a fold-down seat.
If a permanent bench does not suit the layout, the alternative is simply to plan the shower big enough that a movable seat fits without blocking the entry. That costs nothing but forethought.
4. Light, and enough of it
Bathrooms are usually the worst-lit room in a house, and light is the least discussed accessibility decision available. Layer it — ceiling, vanity, and something low for night — and put the layers on separate controls. One detail to know before your electrician arrives: California’s Energy Code requires at least one luminaire in a bathroom to be on an occupancy or vacancy sensor with automatic-off (2025 Energy Code §150.0(k)2E), which is genuinely useful at 3am — and worth aiming at the light you want to come on by itself.
Also: contrast. A white floor, white walls and a white toilet is a problem for anyone with reduced vision, because nothing has an edge. Tonal contrast between floor and wall does more for usability than most hardware.
What we would not bother with
Being straight about this is more useful than a longer list.
- Walk-in tubs. We do not install them. You sit in the tub while it fills and again while it drains, the door seal is a failure point, and assisting someone is awkward. For most people a curbless shower is the better answer. More on that comparison here.
- Clinical-looking hardware, bought early. Grab bars have improved enormously and many now look like towel bars. But buying any of it before you need it means living with it for a decade. Put in the blocking; buy the bar when it is wanted.
- Widening every doorway pre-emptively. Worth doing if the wall is coming out anyway. Not worth structural work on speculation.
Why this comes up more in some foothill communities
Two of the communities we serve are gated lake communities: Lake Wildwood, laid out by developers in the 1960s, and Lake of the Pines, whose lakefront originals date from the 1970s. Both include a meaningful share of long-term owners and second homes, and in both the original bathrooms are wearing out on a shared schedule rather than one house at a time.
That combination — long-term owners, ageing housing stock, and people who intend to stay — is why accessibility comes up in conversation there more than anywhere else we work. It is also why the planning argument lands: if you are rebuilding a bathroom that still has its original fixtures and you expect to be in the house in fifteen years, the walls are open exactly once.
Both communities are gated, which affects scheduling rather than design — crew access and delivery windows are arranged with the association in advance.
A note on what we do not claim
You will find a lot of accessibility content built on alarming statistics and specialist-sounding credentials. We are not going to do that.
We are a bathroom remodeling company. We are not occupational therapists, we do not hold a specific ageing-in-place certification, and we are not going to quote you a fall statistic we cannot source. The ADA dimensions on this page are a published federal standard for public and commercial buildings — we cite them because they are the clearest numbers available, not because your house is subject to them. If someone in your household has specific mobility needs, an occupational therapist will give you better guidance on requirements than any contractor will — and we are happy to build to their recommendations.
What we can tell you is what is cheap to do now and expensive to do later. The work itself carries our 3-year workmanship warranty.
The short version
- Blocking behind the tile. Always. Even if you want no grab bars.
- Lowest threshold your floor genuinely supports.
- A bench or a fold-down seat, or room for a movable one.
- More light than you think, on layers, and contrast between surfaces.
- Skip walk-in tubs and pre-bought hardware.
None of it makes a bathroom look like a hospital. Done properly, an accessible bathroom just reads as a well-designed one — which is the point.
Planning a remodel in the foothills and thinking about the long term? Tell us about the project, or read more about walk-in and curbless showers.
About this article: Written by Oakwood Remodeling Group Auburn — Oakwood Remodeling Group Inc., California contractor license #1125321, at 11641 Blocker Dr, Auburn, CA 95603. We remodel bathrooms and showers only, across the Placer and Nevada County foothills, and our work carries a 3-year workmanship warranty. Where this article states a code or standard, the source is linked. If you have a question we didn't cover, ask us directly— we're happy to walk through your specific bathroom on the phone.
