Hall Bathroom Remodel in Ontario
A compact hall bathroom in Ontario, rebuilt from the framing out with a double vanity and a glass-enclosed shower.
Project at a glance
| Location | Ontario, CA |
| Completed | 2026 |
| Project type | Hall bathroom remodel |
| Scope | Demolition, rough plumbing, tile, glass shower enclosure, dark double vanity with quartz top, fixtures, paint |
Rough plumbing
The first photo shows the bathroom opened to the studs with the new supply lines and shower valve in place.
The finish
A dark two-sink vanity with a white quartz counter and undermount sinks, and a tiled shower with a mosaic accent band behind a frameless glass door.
Working inside a five-foot footprint
A hall bathroom is almost always the same shape: a rectangle about five feet wide, with the tub across the end wall and the toilet and vanity down one side. That footprint is not an accident — it is the width a standard bathtub was designed around, and it has been the default in Californian tract housing for seventy years.
It also means the layout decisions are largely made for you. There is one wall with plumbing in it, and moving fixtures off that wall means opening the floor and re-routing drains. Most of the value in a small bathroom remodel comes from working within the existing plumbing wall and spending the budget on surfaces, storage and light instead.
Tub or shower in a hall bathroom
This is the decision homeowners agonise over, and the honest answer depends on the rest of the house rather than the room.
- Keep the tub if it is the only bathtub in the house. Buyers with small children look for one, and a house with no tub anywhere narrows the market when you sell.
- Go to a shower if there is already a tub elsewhere. A walk-in shower makes a small room feel considerably larger, is easier to get into as you age, and gives you the wall area for the tile you actually want.
- Keep a tub-shower combination if you want both and the room is five feet wide, because that is exactly what the footprint is for.
Where the money goes in a small bathroom
Counter-intuitively, a small bathroom is not a cheap bathroom. The fixed costs — demolition, waterproofing, a new valve, an exhaust fan, tiling labour, a new floor — barely change between a hall bath and a primary suite. What changes is the quantity of tile and the price of the vanity.
The practical consequence is that upgrading materials in a small room costs very little in absolute terms. The difference between builder tile and something you actually like might be a few hundred dollars across a room this size. That is the one place where a small bathroom is genuinely an advantage.
The fan is not optional
Every room with a bathtub or shower has to have mechanical exhaust that discharges directly outdoors — not into the attic, not into a soffit. The California Mechanical Code sets the rate at 50 cfm for a fan you switch on and off, or 25 cfm if it runs continuously (CMC §405.3 and §405.3.1).
Ducting a bathroom fan into an attic instead of through the roof or wall is one of the most common defects we find in older houses, and it is exactly how you get mould in the roof structure above a bathroom that looks perfectly clean from inside.
Before, during and after
Related: Bathroom remodeling
What a hall bathroom rebuild involves in Ontario
Ontario runs its own building division, and a hall bathroom taken to the studs is permitted whenever plumbing or circuits move, with inspections at rough-in and at final. The sequence is demolition, rough plumbing and electrical, inspection, waterproofing, tile, then the vanity and fixtures. Converting a tub to a shower in the same footprint is a common variation; our tub-to-shower conversion cost guide covers it. See also the bathroom remodel permit guide, our Ontario page and bathroom remodeling.
Questions about hall bathroom remodels
How long is the bathroom out of use?
A single bathroom remodel is normally a few weeks rather than a few days, and the middle stretch is unavoidable: after demolition there is rough plumbing and electrical, then inspection, then waterproofing, then tile, then grout, and several of those steps have to cure before the next begins. Anyone promising a finished bathroom in a week is skipping a cure time.
Do I need a permit for a bathroom remodel?
If you are changing plumbing, electrical or ventilation — which nearly every real bathroom remodel does — then yes. Replacing a vanity and repainting is different. The moment a wall opens or a fixture moves, it is permitted work, and that brings the inspections that protect you.
Can I move the toilet or the tub?
Yes, but understand what you are buying. Moving a fixture means opening the floor and re-routing drain and vent, which on a slab means cutting concrete. It is a real cost for a layout gain that in a five-foot room is often small. We would rather talk you out of it unless the existing layout genuinely does not work.
What makes a small bathroom feel bigger?
A frameless glass panel instead of a curtain or framed door, tile running to the ceiling, a single floor material carried through without a threshold, a wall-hung or open-leg vanity so you see floor underneath, and proper light at the mirror rather than only overhead. None of those change the dimensions and all of them change how the room reads.
See more of our bathroom remodeling work, or the Ontario service area page for what we do across western San Bernardino County.
Thinking about a similar project?
We remodel bathrooms across Los Angeles, Orange, Ventura, western Riverside and western San Bernardino counties, including Ontario and Rancho Cucamonga. Green Design and Build is a licensed residential general contractor (CSLB #1110975) based in Van Nuys. We reply within one business day.