Bathroom Remodeling Built Around What Happens Behind the Tile
A bathroom is the one room you deliberately spray water at every day. We rebuild them from the framing out — bonded waterproofing, correct fall to the drain, real ventilation, and licensed plumbing and electrical work.
- Written scope before demolition begins
- Licensed plumbers and electricians on every job
- Shower pans flood-tested before tile is set
- Dated photos of waterproofing before it is covered
Scope
What bathroom remodeling actually involves
Finish-level refresh
Everything you touch changes; nothing behind the wall moves. New vanity, top, toilet, mirror, lighting, hardware, paint and often new floor tile, with the existing shower left in place. The plumbing stays on its current rough-in, so there is no drain work and usually no permit. Fastest option, fewest surprises — but it cannot fix a shower that leaks.
Gut and rebuild in place
Down to the framing and back up on the same footprint. Old pan and tile out, subfloor and framing repaired where needed, new blocking, new valve, a full waterproofing system, a fan ducted outside, tile from floor to ceiling. This is where a tub-to-shower conversion belongs, and where a room that smells damp or stains the ceiling below actually gets fixed.
Layout change or accessible rebuild
Walls, drains and door openings move. Borrowing space from a closet, splitting a shared bathroom, relocating the toilet, cutting and re-pouring slab for a recessed curbless pan, widening the doorway for a wheelchair. It carries permits, inspections, sometimes framing work, and the longest schedule — and it is the only honest route to a genuinely step-free bathroom.
What bathroom remodeling costs in the Houston area
Most national cost pages answering this question are aggregators extrapolating averages across the country. Here is how a contractor actually builds the number for your project.
What moves the price
| Driver | Why it matters | Impact |
|---|---|---|
| Whether the drain moves | Keeping the shower and toilet on their existing drain lines is the single biggest saving available. Moving them means cutting and re-pouring a concrete slab, or working under a pier-and-beam floor, then having the new lines pressure-tested and inspected before anything is covered. | High |
| Shower size and the waterproofing system | A bigger shower is more membrane, more mortar bed, more tile and often a larger valve. A curbless entry costs more again, because the floor has to be recessed into the slab or the whole bathroom floor built up to meet it, plus a linear drain. | High |
| What demolition uncovers | Failed caulk lines and slow supply leaks rot framing and subfloor out of sight for years. Nobody can price that from a walkthrough, so it belongs in the contract as a written allowance settled with photos and a signed change order — not as a number invented up front. | Variable |
| Tile format, pattern and cutting | Labour drives this, not the price per square foot. Mosaics, herringbone, stacked patterns, mitred external corners, niches and benches all multiply cuts and setting time. Large-format tile is quick on a flat wall and slow on a wall or slab that is out of plane. | Variable |
| Glass enclosure type | A framed sliding door is a catalogue item fitted in an hour. Frameless heavy glass is templated only after tiling, made to your exact opening, and priced by area, hardware finish and any notch or angle. It also adds one to three weeks of waiting to the schedule. | Medium |
| Valve and fixture specification | Trim has to be chosen before rough-in, because the valve body buried in the wall must match it. Thermostatic and multi-outlet valves, body sprays and rain heads need more supply capacity and sometimes a larger water heater, which quietly doubles a plumbing package. | Medium |
| Ventilation and electrical upgrades | A correctly sized fan with a duct run to the outside, GFCI protection, a dedicated circuit, in-floor heat or a heated mirror all mean new cable back to the panel. If the panel has no spare capacity, that becomes its own line item rather than a small extra. | Medium |
| Accessibility features | Solid blocking in open walls costs very little and lets grab bars go anywhere later. A curbless floor, linear drain, wider door opening, built-in bench and anti-scald valve are real money now, but each is far cheaper than retrofitting it into a finished bathroom. | Variable |
Ask any contractor for a written scope separating allowances from fixed pricing. An allowance is a placeholder for a selection you have not made yet — a bid built mostly from allowances is not really a fixed price.
What is different about this work in Houston
Humid air, and where the duct actually ends
Gulf Coast air rarely gives a bathroom the chance to dry out on its own. A fan is only as good as its duct: crushed flexible pipe, a long sagging run, or a duct that simply stops in the attic instead of reaching a roof or wall cap sends warm wet air into the roof structure, where it condenses and drips back through the ceiling. Size the fan to the room, duct it to daylight, insulate it, and control it with humidity sensing rather than the light switch.
Clay soils, moving slabs and cracked grout
Much of this region sits on expansive Beaumont and Lissie clays that swell in wet months and shrink in drought. That movement is why doors stick, why a bathroom floor can read out of level, and why grout cracks in a long straight line across a room. The answers are structural rather than cosmetic: an uncoupling membrane under floor tile, movement joints at the perimeter, and flexible sealant instead of grout in every internal corner where two planes meet.
Permit authority follows the address
The Houston metro has no conventional zoning, so what governs your bathroom depends on the exact address rather than the mailing city. Some homes fall under a municipal permit office, some are unincorporated and inspected by the county, and some sit under a township. Deed restrictions and an HOA architectural committee reviewing under Texas Property Code Chapter 209 can apply on top of that. Moving a drain or adding a circuit usually needs a permit; a like-for-like fixture swap often does not.
The 50% substantial-improvement rule
If the home is in a mapped floodplain, improvement costing 50% or more of the structure’s pre-improvement market value pushes the entire structure into floodplain compliance, which can mean elevation. One bathroom rarely reaches that threshold alone, but the figure is based on the structure’s value rather than the land’s, and offices may count work done over a period together. Your local floodplain administrator is the only source of a binding determination. Ask before signing, not after demolition.
Our process
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1. Call and photo review
A short call plus photos of the room, the vanity plumbing and the ceiling tells us most of what matters: whether the house is on slab or pier and beam, where the existing drain sits, whether the fan vents outside, and how old the shower assembly probably is. We arrive to measure already knowing the likely constraints.
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2. Measured survey and written scope
We measure the room, check the electrical panel for spare capacity, look at the valve type and the vent path, and put the job in writing: what comes out, what goes back, what stays untouched, and a stated allowance for concealed repair we cannot price until the wall is open.
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3. Selections locked before demolition
Tile, valve trim, vanity, toilet, fan and lighting are chosen and ordered before anything is torn out. The valve body buried in the wall has to match the trim you picked, and tile thickness sets finished floor heights. Long-lead items go on order first so they are not the thing holding up the schedule.
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4. Permits, protection, demolition and rough-in
The licensed plumber and electrician pull the permits their own work requires. We protect the route from the front door, contain dust, strip back to framing, add blocking for grab bars and a wall-hung vanity, set the tub or pan, and pressure-test the new lines ahead of inspection.
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5. Waterproofing, flood test, then tile
The membrane goes on with banded seams and preformed corners, the drain is sealed to it, and the pan is plugged and flood-tested overnight before a single tile is set — the water level should not drop. You receive dated photographs of the finished waterproofing. Only then do floor, walls, niche and bench get tiled.
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6. Trim-out, glass and punch list
Fixtures, vanity, mirror, lighting and hardware go in, then the glass company templates the finished opening. Glass always follows tile, which is why it lands last. Final inspection, silicone at every change of plane, a walkthrough where you write the list, and care notes on what to reseal and when.
Options and decisions
Keep a tub, or lose it
A tub bathes small children and matters to a slice of buyers, so most houses want at least one somewhere. In a primary bathroom nobody actually bathes in, the tub is dead floor area — converting it buys a much larger shower without moving a single wall. Decide this before anything else, because the whole layout follows from it.
Curb or curbless entry
A curb is cheap, contains water easily and becomes a trip hazard as you age. A curbless entry looks cleaner, lets a wheelchair or shower chair roll straight in, and requires the slab recessed or the floor built up, a linear drain, and waterproofing extended well beyond the shower footprint.
Tile size against grout lines
Large-format tile means fewer joints to scrub, but it needs a flat substrate and telegraphs any dip in the wall. Small mosaic follows the slope of a shower floor and gives wet feet grip. Epoxy grout resists staining but is unforgiving to install and to repair; good cement grout is the usual middle ground.
Vanity height, storage and mounting
Drawers hold far more usable storage than doors and cost more. A wall-hung vanity makes a small room feel larger and leaves the floor easy to clean, but the wall needs blocking and the drain has to be raised. Around 32 inches is standard height; 36 suits tall adults and suits children poorly.
What holds up on the Gulf Coast
| Element | What we recommend | Why |
|---|---|---|
| Shower waterproofing | One manufacturer’s bonded system throughout — sheet or liquid membrane over a sloped bed, or a matched foam pan — with its own banding at every corner, seam and pipe penetration. | Cement board is not waterproof; it is only a stable surface for tile. Mixing brands voids the system warranty, and in this climate a wall cavity that gets wet does not dry back out on its own. |
| Wet-area backer board | Cement board or foam-core board behind all tile in the shower and tub surround. No paper-faced drywall inside the wet zone, including the green-tinted kind. | Paper facing feeds mould the moment humidity and a small leak meet. Foam board doubles as part of the waterproofing layer when it is part of a matched system. |
| Grout and sealant | High-performance cement grout or epoxy on shower walls and floor, with 100% silicone — never grout — at every internal corner and where tile meets tub, pan or floor. | Those corners are movement joints. As the slab and framing move with the seasons, grouted corners crack first, and that hairline crack is the usual entry point for water getting behind tile. |
| Floor tile and underlayment | Through-body porcelain over an uncoupling membrane, movement joints at the perimeter, and small-format mosaic on the shower floor itself. | Porcelain absorbs almost no water. The uncoupling membrane lets a moving slab move without telegraphing the crack into your tile, and small tiles follow the slope to the drain and give wet feet grip. |
| Exhaust ventilation | A fan sized to the room volume, on insulated rigid or smooth duct, terminated at a roof or wall cap outside, run by a humidity sensor or timer rather than the light switch. | Wet air stalling in a sagging or uninsulated duct condenses and runs back into the housing. A duct that stops short in the attic instead of reaching a cap quietly wets the roof deck and grows mould above the ceiling. |
| Vanity cabinetry | Plywood-box construction or a wall-hung unit, moisture-tolerant finish, and a sealed or raised toe kick. | Raw particleboard and unsealed MDF swell from splashes and from months of humid air. The toe kick fails first because it sits in every mop, every drip and every overflow. |
| Glass, hinges and hardware | Tempered glass with a factory protective coating, hung on quality stainless or PVD-coated hardware rather than plated budget fittings. | Mineral film from hard water etches untreated glass over time, and plated hinges and hangers spot and pit faster in humid and coastal air. Coated glass wipes clean instead of needing acid cleaners. |
Recent bathroom remodeling projects
Bathroom Remodeling questions
How long does a bathroom remodel take?
It depends how far it goes. A refresh that leaves the plumbing where it is can run a few days. A full gut and rebuild is usually several weeks of working days, and the calendar is driven less by labour than by fixed waits: inspections have to be scheduled, the pan is flood-tested, thin-set and grout need cure time, and frameless glass is templated only after tiling is complete, then made to order. Tell us early if it is the only bathroom in the house. We can sequence a working toilet and sink back in sooner, but there will still be days when the room simply cannot be used.
Do I need a permit, and does my HOA get a say?
It depends on your exact address, not your mailing city. Swapping a vanity, toilet or tile like for like is often exempt. Moving a drain, adding or extending circuits, or altering framing normally requires a plumbing or electrical permit and an inspection, pulled by the licensed trade doing that work. Some homes sit inside a municipal permit office, some are unincorporated and inspected by the county, and some fall under a township with its own process. Separately, deed restrictions and an HOA architectural committee can apply under Texas Property Code Chapter 209. That is a private approval with its own review timeline, and it does not replace a permit. We confirm both before demolition is booked.
Can you turn my tub into a walk-in shower?
Almost always. The tub comes out, the drain usually shifts a few feet and is re-piped and inspected, and the alcove is rebuilt with new backer board and a full waterproofing system rather than tiled over. Two choices move the price: curb or curbless entry, and whether the shower stays inside the old tub footprint or borrows space from a closet or the next room. One caution worth hearing first — if this is the last bathtub in the house, some buyers with young children will rule the home out. If there is another tub elsewhere, that concern goes away entirely.
Why does mould keep coming back no matter how much I clean?
Cleaning treats the surface. Regrowth is the room telling you it stays wet. The usual causes, roughly in order: a fan undersized for the room or never run long enough after a shower, a duct that is crushed, sagging or terminating in the attic instead of outside, paper-faced drywall used inside the wet zone where cement or foam board belonged, and a failed corner joint letting water behind the tile. If it returns in the same corner, or on the ceiling directly above the shower, it is a ventilation and waterproofing failure rather than a housekeeping one. Fixing it properly means opening that area, not painting over it.
What happens if you find rot or an old leak behind the wall?
On any bathroom past about twenty years old we expect to find something, because caulk joints and old pan liners fail quietly long before anyone notices a stain. What we will not do is invent a number for it up front. The written scope carries an allowance for concealed repair. If we open the wall and find soft framing, a rusted drain or a wet subfloor, you get photographs, a written price for the repair and a decision to make before work continues. Nothing damaged gets closed up and tiled over. That is why the first figure is honest, and also why an older house can move.
How do I know the shower was actually waterproofed?
Ask three things and you can judge it yourself, whoever does the work. First, which waterproofing system is being used, by name — a sound installation uses one manufacturer’s membrane, banding, corners and drain together, because mixing brands voids the warranty. Second, ask for the pan to be plugged and flood-tested and left standing before any tile goes on; the water level should not drop. Third, ask for dated photographs of the finished membrane, corners and drain seal before tile covers them. We do all three as standard. Anyone can say the word waterproof in a sales meeting; those three pieces of evidence are what separate the claim from the work.
What should I build in now if I want to stay in this house as I age?
The cheapest items are the ones that must happen while the walls are open. Solid blocking behind the tile lets grab bars be mounted anywhere later without hunting for studs, and it adds very little to the job. Beyond that: a curbless or low-threshold entry, a shower wide enough to turn around in, a folding or built-in bench, a hand shower on a slide bar, an anti-scald thermostatic valve, lever handles, a comfort-height toilet, and light aimed into the shower rather than only at the ceiling. Widening the doorway matters more than people expect, since a fitted door eats into the clear width. ADA is a public-building standard; a home should fit the person living in it.
I am in a mapped floodplain. Does that change a bathroom project?
It can, and it is worth settling before you sign anything. Local rules treat improvement costing 50% or more of the structure’s pre-improvement market value as substantial improvement, which forces the entire structure into current floodplain compliance and can include elevation. A single bathroom rarely reaches that threshold on its own, but the value used is the structure’s rather than the land’s, and a permit office may look at work carried out over a period rather than one job in isolation. Only your local floodplain administrator can issue a binding determination for your address, and they will do so on request. If several rooms are planned over a couple of years, ask before the first one starts.
Where we work
We serve the Houston metro from Katy and Cypress east to Kemah and League City,
north to Conroe and The Woodlands, and south through Pearland, Alvin and Texas City.
Talk to someone who has done this before
Tell us about your bathroom remodeling project and we will walk you through scope,
budget and timeline — no obligation, no pressure.