This is the question nobody asks, and it decides whether everything else was worth doing.
You can build the best walk-in shower in Durham Region. Solid blocking, thermostatic valve, bench, handheld on a rail, floor she cannot slip on. And if the doorway is 24 inches wide and she is using a walker, she still cannot get to it on her own.
The number is 32 inches of clear width
Clear width is the actual opening with the door standing open, measured from the face of the door to the opposite stop. It is not the size of the door slab and it is not the rough opening in the framing.
A standard walker is roughly 24 to 27 inches wide at the handgrips. Thirty-two inches of clear width lets someone walk it through straight, without turning, without scraping knuckles on the frame. A wheelchair needs the same 32 inches minimum, and more if the approach is at an angle rather than straight on.
How to measure it in thirty seconds
Open the door fully. Put a tape measure across the opening at about waist height, from the door face on one side to the stop on the other. That number is what matters. If it reads under 30 inches, raise it with whoever is quoting the work, because it changes the job.
What the common door sizes actually give you
| Door slab | Clear width, roughly | What gets through |
|---|---|---|
| 24 in | 22 in | One person, nothing else |
| 28 in | 26 in | Tight for a walker, turned sideways |
| 30 in | 28 in | A walker, awkwardly |
| 32 in | 30 in | A walker, comfortably |
| 34 in | 32 in | A walker or a wheelchair |
Older homes across Oshawa, Whitby and Bowmanville are full of 24 and 28 inch bathroom doors. It was normal when the houses were built and nobody was thinking about a walker forty years later.
What it takes to widen one
Widening a door is a framing change. The existing king and jack studs come out, a new header goes in, and the opening is reframed to the new width. Then drywall, trim, paint, and a new door and hardware.
Whether it is straightforward or expensive depends on one thing: what is in the wall. If the wall is non-structural and carries no plumbing or electrical, it is a day of work. If it is load bearing, or the light switch and the bathroom circuit run through it, or a vent stack sits in the bay you need, it becomes a different job with an engineer and a permit.
It is priced separately from every package
Door widening is not included in the published prices for any of the four options, because the cost swings so widely depending on what is behind the drywall. Anyone who quotes you a bathroom conversion without looking at the door is quoting something they have not measured.
When you do not need to widen it
Three situations where the answer is honestly no.
She walks unaided. If she is steady and the problem is the tub wall rather than mobility, a 28 inch door is not stopping her. Spend the money on the shower.
The door swings into the bathroom and the room is tight. Sometimes rehanging it to swing outward, or replacing it with a pocket or barn door, recovers enough usable floor space that the width matters less. It is cheaper than reframing.
She uses a cane. A cane needs no more width than a person does.
The order to think about it in
If a walker or wheelchair is part of daily life now, the door comes first. There is no point building a curbless shower behind a door she cannot get through, and we would rather tell you that before you have chosen tile.
If mobility is fine today but declining, widen the door while the walls are open anyway. The framing is exposed, the drywall is coming off regardless, and doing it later means opening a finished wall twice.
Not sure what her door measures?
The free bathroom check asks about the door along with five other things that decide what is possible. Two minutes, and it tells you honestly if the answer is complicated.