Houston 77003 sits about 18 miles from our shop, and shower to tub conversion is work we do there regularly.
The industry spends most of its energy converting tubs into showers, so a shower to tub conversion tends to catch people off guard. It is a real and reasonable request, and it comes from three places: a household with small children who need to bathe them, a homeowner who has ended up with no tub anywhere in the house, or somebody preparing to sell in a neighborhood where buyers expect at least one. It is also a job that is easier to describe than to perform, because a tub has different drain requirements than a shower and Houston houses sit on concrete. This page is about deciding, before you commit.
What the work involves
Start with the count. If the house has more than one full bath and at least one already has a tub, converting a shower back is usually about that specific room’s use rather than the house’s resale profile. If it is the only bathroom, or the only full bath, the calculation changes considerably.
Then the space. A standard alcove tub needs a defined length between finished walls. Many showers, particularly those built into a former tub alcove, still have that dimension and can accept a tub with modest framing work. Neo-angle and corner showers usually do not, and converting one of those means rebuilding the walls entirely.
Then the drain. This is the technical crux. A shower drain sits at the centre of the pan; a tub drain sits at one end, in the wall line, with an overflow and a trap in a specific position. On a slab-on-grade house, moving it means cutting concrete.
Then the plumbing above the floor: a tub filler and a shower head served by one valve, at heights suited to a tub rather than a standing shower, which means the valve moves down and the head can stay.
Then surround. Tile to the ceiling, a tiled surround to a defined height, or a solid-surface or acrylic surround. Each has different waterproofing and different maintenance.
And finally the decision most people forget: what happens to the glass, and whether you want a shower curtain, a fixed panel, or nothing at all.
Materials and specification
Tub material is the first fork. Enamelled steel is light and cheap, transmits noise, and chips if something heavy lands in it. Cast iron is quiet, holds heat and sits dead still, but it is heavy enough to matter on a second floor and hard to walk through a narrow 1960s hallway. Acrylic with a fibreglass backing is warm underfoot and forgiving to carry, but it only behaves if it is fully bedded; unsupported, it flexes at the drain.
Valves matter more than trim. A tub-and-shower valve has to be a pressure-balancing or thermostatic type, and in Houston’s hard water a ceramic-disc cartridge from a line whose parts stay available is worth more than a finish. Substrate is cement board or a bonded foam board, never paper-faced gypsum in the wet zone, with a liquid or sheet membrane on the face. Cementitious grout with a polymer works; the joint where tile meets tub gets silicone, because that joint moves.
Building for Gulf Coast conditions
The Gulf Coast fact that matters most for this job is under your feet. Houston houses are almost universally slab-on-grade, and moving a shower drain to a tub drain position means saw-cutting and breaking concrete, digging to the existing line, re-plumbing with correct fall, and patching.
On a post-tension slab — common in Katy, Cypress, Fulshear, and much of the newer suburban stock — the area must be scanned before any cutting. Post-tension tendons carry significant force, and cutting one is a serious repair. Scanning is a small cost against that risk and is not optional.
In older inner-Houston houses the drain you find may be cast iron, joined with lead and oakum. That changes the transition detail and it is also the moment to judge whether the rest of that line is worth replacing while it is exposed.
Above the floor, humidity and hard water shape the finish choices. A tub surround in this climate needs the same real waterproofing a shower does, and Houston’s hard water leaves scale on a tub filler and on glass, which is why brushed and living finishes are often easier to live with here than polished chrome.
Houston housing stock
Houston is not one housing stock, so it is not one kind of remodel. In the Heights and Woodland Heights you are often working on 1910s–1930s wood-frame homes on pier-and-beam, where leveling, sill and joist repair, and original wiring long past its service life come before anything cosmetic — and where a home in a designated historic district brings design review with it. Montrose, Oak Forest and Garden Oaks add mid-century layers. Meyerland, Westbury, Braeswood and Sharpstown are largely 1950s–60s slab ranch: cast iron drains near the end of their life, galvanized supply, single-pane windows, popcorn ceilings that should be tested before they are disturbed. Memorial and Alief lean 1970s–80s, which brings aluminum branch wiring and polybutylene supply into the conversation. West of Beltway 8 you are usually in 2000s and 2010s construction, where the job is upgrade rather than repair. Houston has no zoning, but plumbing, electrical and structural work is permitted, and deed restrictions still govern a great deal.
What goes wrong, and how it is avoided
The expensive mistake is spending upward on visible things over an assembly that was not built for it. Large-format tile on a substrate that was fine for small ceramic will telegraph every low spot and crack at the hollow ones. A thermostatic valve fed by a galvanised line that is closing up with corrosion will never deliver its flow. Stone set over a membrane with pinholes at the corners will stain from the back and cannot be cleaned.
At the other end, cutting the wrong corners costs more than it saves: skipping the support bed under an acrylic tub, using paper-faced board in the wet zone, tiling only to shower-head height and leaving untreated gypsum above it in a humid room, or grouting the tub joint instead of sealing it. A lean specification should be lean in materials, not in the parts of the assembly that keep water out of the wall.
What drives the cost
The drain decides the number. If the existing shower drain happens to sit where a tub drain needs to be, or close enough to reach with an acceptable connection, the job stays above the slab and the cost is framing, tub, valve, surround, and finish. If concrete has to come up, add scanning, cutting, excavation, plumbing, patching, and inspection.
Tub choice is the second driver and it is wide open. A standard acrylic alcove tub is one thing; a cast iron alcove tub is heavier and may need floor and access consideration; a freestanding tub with a floor-mounted filler is a different project entirely and needs supply and drain coming up through the slab in a specific spot.
Surround type matters: an acrylic surround is the light option, tile to the ceiling is more.
Then the discoveries — rot at the base of the old shower walls, failed waterproofing behind the tile, or aged supply piping. Conversions typically fall in a wide range depending on the drain answer above all.
How we work
The first visit measures the alcove and locates the existing drain, then establishes whether the slab is post-tension.
From that we can tell you whether you are looking at an above-slab job or a concrete job, which is the fork in the road for both cost and schedule.
Then tub and valve selection, because tub dimensions and valve type drive the rough-in.
Permits where the work requires them — plumbing work is permitted in the City of Houston, and Harris County and the Fort Bend municipalities run their own processes.
Then demo, any slab work and scanning, rough plumbing, inspection, framing and blocking, backer and waterproofing, tub set and levelled, surround, trim, and a punch walk.
To find out which side of that fork your bathroom is on, call (281) 235-6971.
Common questions
Can I put a freestanding tub in where the shower is?
Sometimes, and it is a bigger job than an alcove tub. A freestanding tub needs the drain in a specific spot under the tub body and, with a floor-mounted filler, supply coming up through the slab too. On a post-tension slab that means scanning and careful coring. It also needs floor area around it for cleaning, and enough room that the filler is not in a walkway. Space, then drain, then style.
Is a tub-shower combination or a tub alone better?
For most households a combination, since it keeps the room usable for adults who shower and children who bathe. A tub alone makes sense only where there is another shower nearby and the room is dedicated to soaking. The combination does require the full wall waterproofing a shower needs, since the walls get wet daily. A tub with a low surround and no shower head can be finished more simply.
Do I need a tub in the house to sell it?
It is a market judgment rather than a rule, but many buyers with young children do look for at least one. If your house has multiple full baths and one has a tub, converting a shower is unlikely to be a resale issue. If you are down to no tub in the house at all, some buyers screen you out. That is worth weighing against how much you would actually use it while you live there.
Will you have to cut my slab?
Only if the drain has to move, and that depends on where your shower drain sits relative to where a tub drain needs to be. A shower drain is central; a tub drain sits at one end against the wall. Sometimes the two are close enough to work with, often they are not. We locate the existing drain during the first visit so you know the answer before you are committed to anything.
Do you cover Houston 77003?
Yes. Houston 77003 is about 18 miles from our shop at 1530 W Sam Houston Pkwy N, Houston, TX 77043, inside the area we work in daily. Call (281) 235-6971 to arrange a site visit.
MS Home Remodeling — shower to tub conversion in Houston, TX 77003. Call (281) 235-6971 for a site visit.