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Ada Bathroom Remodel in the Houston Metro

Two houses can need the same accessible bathroom and still be two completely different jobs. A 1968 ranch off Chimney Rock sits on a conventionally reinforced slab with cast iron waste lines buried in it and a 30-inch bathroom…

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In short

Work starts with measurement, not demolition. We map clear floor space, the door swing, the approach to the toilet, and where a wheelchair or a walker actually has to turn. Then we find out what the floor is: original plans if the owner has them, a scan of the slab on anything built after the…

What the work involves

Work starts with measurement, not demolition. We map clear floor space, the door swing, the approach to the toilet, and where a wheelchair or a walker actually has to turn. Then we find out what the floor is: original plans if the owner has them, a scan of the slab on anything built after the mid-1980s, and a camera down the drain line on older stock.

Demolition takes the room to studs and bare slab. In an older house that usually exposes a cast iron closet bend and galvanised supply, both of which get replaced rather than reused. Moving a shower drain or a closet flange means saw-cutting and trenching the slab, setting new PVC, pressure-testing, then repouring and re-tying to the surrounding concrete.

Framing follows. That is widening the rough opening or hanging the existing door on swing-clear hinges, furring a wall where a wall-hung carrier goes, and installing solid blocking behind every location a grab bar could ever be needed. Electrical comes next: GFCI protection, an exhaust fan ducted to outside air, rocker switches at reachable height. Then waterproofing, drain and sloped bed, tile, valve trim, fixtures, bars anchored into that blocking, and a low beveled threshold.

What gets specified, and why

Waterproofing is the decision that matters most. On a curbless layout the wet zone is effectively the whole room, so a bonded sheet membrane or a roller-applied liquid membrane runs past the shower footprint, up the walls, and out under the door line, tied to a bonding-flange drain rather than an old clamping ring. Cement backer board or foam board goes under it. Paper-faced drywall does not belong anywhere in that zone.

Floor tile gets chosen for wet traction, not for looks. Porcelain with a published wet slip rating suited to barefoot use, in a smaller format so there are more grout joints breaking surface tension, outperforms a large polished panel every time. Polished marble in a roll-in shower is a fall waiting to happen, and Houston’s hard water leaves scale that etches stone the moment someone reaches for an acidic cleaner.

Grab bars should be stainless with a peened or textured grip, through-anchored into solid wood blocking. Valves are pressure-balancing or thermostatic, with a handheld on a slide bar and a long hose so the water can be started from outside the spray. Wall-hung and console lavatories need the trap and supplies insulated so knees never touch hot metal.

Why the Gulf Coast changes this job

The dividing line runs roughly along the age of the slab. Houses built before the mid-1980s inside the Loop and through Spring Branch, Meyerland and Sharpstown generally have conventionally reinforced slabs with cast iron waste cast into them. Those can be scanned, cut, trenched and repoured to move a drain into a compliant clear space. Cast iron that has spent fifty years in Gulf Coast soil is often shelled thin along the invert, so once it is open it gets replaced rather than patched.

West of Highway 6 in Katy, Cypress, Fulshear and parts of Sugar Land, post-tension slabs are the norm. Those slabs carry tensioned steel tendons, and cutting one without locating the tendons first can sever a cable under load. That changes the approach entirely: we scan, and where a drain has to move through a tendon zone we build the floor up and ramp the doorway instead of cutting. Either way the clay underneath swells and shrinks with the seasons, which is why the tile assembly gets an uncoupling or crack-isolation layer and soft joints at every perimeter and restraint.

Where these jobs go wrong

Blocking installed only where the bars were drawn. Needs change. Blocking is cheap while the walls are open and impossible afterwards, so we sheet whole wall sections with plywood backing rather than chasing two studs at one height.

Doors that swing into the clear floor space. In a small room the door should swing out, or become a pocket or barn door, and the pocket wall then cannot carry a grab bar without a separate framed and blocked section.

Thresholds built up over time. A membrane, a mortar bed and a tile all stack, and a doorway that measured flush on the drawing ends up with a lip. That gets designed in at the framing stage, not discovered at tile.

Skipping the slab scan on a post-tension house. There is no way to correct a cut tendon after the fact.

Exhaust ducted into the attic instead of through the roof or wall. In this climate that condenses on sheathing and grows what it grows.

Reusing a cast iron closet bend because it looks intact. Once it is exposed, look at the bottom of the pipe, not the top.

What moves the price

Slab work dominates. Scanning, saw-cutting, trenching, plumbing and repouring is a different order of work from setting a fixture, and how far a drain has to travel matters more than whether it moves at all. Replacing failed cast iron or galvanised once it is exposed adds to it.

Widening a door opening is straightforward in a partition and a much larger item in a bearing wall that needs a header. Taking floor area from a closet or hall to make a turning circle brings in framing, flooring and sometimes ductwork.

Curbless costs more than a low threshold, and a linear drain more than a centre drain. Wall-hung fixtures need a carrier and a furred wall. Tile format, layout and waterproofing class all move the number. So does whether the house is occupied while the work runs.

How a project runs

We walk the room with the person who will use it, not just the person paying for it, and measure the real approach: door, transfer, turn, reach. Slab type gets confirmed and scanned before anything is designed around a drain move. You get a written scope naming the membrane, the drain, the valve and the bar locations. Permits are pulled where the jurisdiction requires them, and we work to whatever inspections apply. Then demo, rough-in, inspection, waterproofing with a flood test before tile, tile, trim out, and a punch walk with the bars loaded and the door tried from a seated position. Call (281) 235-6971 to walk the space.

Common questions

Can I have a curbless shower on a post-tension slab?

Often yes, but not by cutting first and asking later. The slab gets scanned to locate tendons. If the drain can move within a clear zone, the slab can be cut and repoured. If it cannot, the alternative is building the bathroom floor up and ramping the transition at the door so the shower still reads flush. Both are real solutions.

My house is from the early 1970s. Do the drains have to be replaced?

Not automatically. We scope the line before design. Cast iron corrodes from the inside along the bottom of the pipe, so a section can look perfect from above and be paper-thin at the invert. If we open the slab and find that, replacing it while the trench is open costs far less than returning to it later.

Does a private home have to meet ADA?

ADA is written for public accommodations, not for someone’s house. What we build is an accessible bathroom using those published dimensions and the residential accessibility standards as the design target, because they reflect what actually works for a wheelchair, a walker or a caregiver. The goal is a room that functions, not a certificate.

Will the older house cost more than the newer one?

Usually, and the reason is under the floor and inside the walls rather than in the finishes. Older stock brings cast iron, galvanised supply, narrow openings and sometimes aluminium branch wiring that needs proper terminations. Newer houses bring the post-tension constraint instead, which limits options more than it inflates labour.

Ada Bathroom Remodel by location

We cover 102 ZIP codes across the Houston metro. Pick the area closest to you:

Planning ada bathroom remodel?

We measure, look at the slab and the existing rough-in, and give you a scope you can actually compare against another bid.

Call (281) 235-6971

MS Home Remodeling · 1530 W Sam Houston Pkwy N, Houston, TX 77043 · (281) 235-6971

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