Blog · November 2, 2026 · Bathroom remodeling

Bathroom remodel planning guide: decisions before tear-out

A bathroom is a small room with a lot packed into it: water in and out, power near water, steam that has to leave, and tile that is costly to redo. Once the tile is up, most of what you decided is sealed behind it. So the useful planning happens early, and it starts with how the room gets used, not with what it will look like.

What should you decide first in a bathroom remodel?

Decide who uses this room and what it fails at today. A hall bath that children share has a different job from a primary bath used by two adults getting ready at the same hour, and from a powder room nobody showers in. Write down the daily annoyances: one sink for two people, no place to set anything down, a mirror that fogs, a shower that stays damp all day, a door that hits the vanity. That list is your brief.

Then look ahead. If someone in the house may find a tub wall hard to step over in a few years, plan for it now, while the room is open. Tile and floors are the parts you only want to pay for once.

Should you keep the tub or switch to a shower?

This is the decision most other bathroom choices hang on, so make it before the tile samples come out. If nobody has taken a bath in months and the tub is mostly a tall step into the shower, a shower usually serves you better. If small children bathe there, or it is the only tub in the house, keeping one may suit you better. It is your call, and it is worth talking through with everyone who lives there.

A swap is more than removing a tub. The drain may need to move, the floor of the shower needs its own slope and waterproofing, and the walls around it need waterproofing to a greater height than a tub surround usually had. If you go that way, our walk-in shower page covers curbs, glass and what keeps the water in, and our steam shower page covers what a sealed enclosure adds.

What does moving the toilet or sink involve?

Layout is where budgets split. Fixtures that stay where they are use the drains, vents and supply lines already there. A toilet that moves needs a new path for a large drain, and that path has to keep its slope through whatever framing is under the floor. On a slab, common in Dallas–Fort Worth, moving a drain usually means cutting the concrete. Over a crawl space, it may be a simpler run. A second sink needs its own supply lines and a drain connection, though it is often a smaller change than moving the toilet.

Before you commit to a new layout, check three ordinary things on paper: whether the door can swing without hitting anyone or anything, whether you can stand comfortably at the sink with the door open, and whether the toilet has elbow room. Tape the new outline on the floor and walk through it during your morning routine. You will learn more from that than from a drawing, and the change costs nothing at this stage.

What gets planned behind the tile?

Think about everything that will be hard to reach later, and decide it while the walls are open:

• The shower valve. Where it sits decides whether you can turn the water on without standing under it. Ask for a valve that holds the water temperature steady when someone flushes or runs a tap elsewhere in the house.
• Solid backing for grab bars. Even if you want no bars today, wood blocking in the right places lets you add them later without opening the tile. It costs little now and a lot later.
• Niches and benches. A niche has to land between studs and away from the valve and any wet pipes, so it gets placed before the wall is closed.
• Outlets and switches. Think about where a hair dryer, a toothbrush charger or a heated towel bar goes. Bathroom outlets need ground-fault protection under the electrical code, so count them in the plan rather than adding them later.
• Light at the mirror. A single fixture overhead casts shadows on your face. Light beside or above the mirror, on its own switch, avoids that, and it needs its wiring before the wall closes.

Plan the fan as part of the shower

A shower puts a lot of moisture into a small room, and that moisture has to go somewhere. The EPA's guide to mold and moisture is plain about it: run the bathroom fan or open the window when showering, and fix plumbing leaks as soon as possible. The same guide says wet materials should be dried within 24 to 48 hours after a leak. A new room with the same old fan, or with a fan that only moves air into the attic, sets up the same problem behind fresher tile.

So treat the fan as part of the shower design. Ask where its duct goes, and make sure the answer is outdoors. Decide how it switches: a fan people forget to run does nothing, so a timer or a humidity control can be worth it.

Which fixtures use less water?

Fixtures are being replaced anyway, so a remodel is the easy moment to choose efficient ones. The EPA's WaterSense label sets these limits:

• Showerheads: no more than 2.0 gallons per minute, against a standard 2.5.
• Bathroom sink faucets: no more than 1.5 gallons per minute, against a standard 2.2.
• Toilets: 1.28 gallons per flush or less, against the federal standard of 1.6.

Order the fixtures before the rough plumbing where you can, and keep each installation sheet. The valve, the drain position and the toilet's distance from the wall are all set from those sheets, and a vanity top is cut to the actual sink. A California home may also have its own rules on replacing older fixtures during a permitted remodel, so ask the building department about yours.

Does a bathroom remodel need a permit?

It depends on your city and what changes. Moving a drain, adding a circuit or opening up a wall usually raises the question. New paint and a same-size mirror usually don't. Rather than guess, describe your exact plan to the building department before work starts.

Dallas is a useful example of how this looks. The city describes a residential permit as official approval to start construction, renovation or major repairs on your home, publishes a remodel checklist, and keeps separate sections for plumbing and electrical work, each under the codes it has adopted with its own amendments. Other cities in Dallas–Fort Worth and the Bay Area run their own departments, so what applies next door may differ.

On our remodels we handle the permits and plans, and design is included: the layout and the finishes. Allow for inspections in your schedule, because some work has to stay visible until it has been inspected.

What moves the price of a bathroom remodel?

We don't publish prices, because two bathrooms of the same size can land far apart. These are what make the difference:

• What moves. A toilet or shower drain that changes place costs far more than one that stays.
• Tub to shower or shower to tub. The waterproofing, the drain and the glass all follow that choice.
• Tile. The material, its size and pattern, and how far up the wall it runs.
• Fixtures and vanity. Stock or built to measure, one sink or two.
• What the tear-out finds. Rot, a slow leak or wet subfloor only shows once the old room comes out.

The first consultation and quote with us are free, financing is available through our lending partner, and our work carries a written warranty with its terms in each contract.

What if the tear-out finds a leak or mold?

Bathrooms hide water well. A worn shower pan, a toilet seal or a tub drain can leak into the subfloor for a long time with nothing showing on the surface. Keep part of your budget aside for this, and agree before work starts on how a discovery gets handled and priced.

If water or mold does turn up, the order changes: we take moisture readings, the wet material comes out, the structure gets dried, and the rebuild starts when the readings say dry. Everything the mold touched is replaced with new material, never cleaned and reused. That is what happened on our Fremont job, where mold was found under a floor and came out with the wet wood during the tear-out. It was not a bathroom, but the sequence is the same. What we do first is on our water damage mitigation and mold remediation pages. When insurance is involved, we document the loss for the claim; coverage stays between you and your policy.

What should be in writing before work starts?

Put the choices themselves in the contract, not only the price: which tile, how high it runs, which valve and fixtures, and who supplies each one. Bathrooms produce a lot of small decisions, and that is where memories differ later. California's Contractors State License Board says a home improvement job over five hundred dollars needs a written contract, sets a usual limit on the down payment, and says any change should be noted in writing on a change order, which becomes part of the contract once signed. Our kitchen planning guide goes through the contract items in more detail, and they apply here too.

A bathroom planning checklist

1. Write down who uses the room and what it fails at today.
2. Decide on tub, shower, or both.
3. Tape out any new layout on the floor and walk through it.
4. Choose the fixtures and keep their installation sheets.
5. Place the valve, blocking for grab bars, niches, outlets and mirror lights.
6. Settle where the fan's duct goes and how the fan switches on.
7. Ask the building department about permits for your scope.
8. Keep part of the budget aside for what the tear-out finds.
9. Put the materials, the price, the payments and how changes are handled in the contract.
10. If it is your only bathroom, work out where everyone will wash during the job.

What a bathroom remodel with us covers, by choice or after a leak, is on our bathroom remodeling page.