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We handle kitchen plumbing rough in across 77093 in Houston, roughly 20 miles from our Energy Corridor base.

Two kitchen remodels can carry the same drawing and the same cabinet order and still share nothing below the finish. A 1968 ranch inside the Loop hides cast iron under the slab and galvanised branches in the wall. A 2004 house in Cypress has PVC drain, PEX supply, and a post-tension slab that changes what can be cut. Rough-in is where that difference gets paid for, and it is settled before a cabinet lands. The questions that matter – can the sink move, does the drain need replacing, is the vent usable – have different answers depending on when the house went up.

Why this is different on the Gulf Coast

The dividing line here is roughly the mid-1980s. Post-tension slabs are common in Katy, Cypress and Fulshear stock from that point, and a post-tension slab cannot be saw-cut on a hunch. Tendons are scanned and marked first, because cutting one is a structural event, not a plumbing repair.

On older poured slabs inside Beltway 8 the tendons are not the issue – the cast iron is. Decades in Gulf Coast soil leave scale, channelling and low spots, and tying bright new PVC into a bellied cast iron run only moves the clog downstream. Expansive clay does the rest: slabs move seasonally with the wet-dry cycle, which is why a trench patch is properly backfilled and compacted rather than topped off. Attic-run supply sees real heat most of the year and the occasional hard freeze, so it gets insulated and kept out of exterior wall cavities where the plan allows.

What we actually do

Work starts after demolition, with the cabinet shop drawings on site and the layout chalked on the slab. The sink base centreline gets marked first, because every stub-out is dimensioned off it. In an older house the existing drain is camera-run before anything is cut, so a bellied or channelled cast iron line is found now rather than after the tile is down.

If the sink stays put, the trap arm is cut back to sound pipe, a new 2 in PVC arm set with fall toward the stack, and the vent connection verified. If the sink moves – island, window wall, shifted run – the slab is scanned, saw-cut, trenched, and the drain re-run in PVC before backfill and patch.

Supply follows: half-inch PEX-A or type L copper to the sink base, with stub-outs for hot, cold, an ice-maker box, a filtered tap, and a pot filler where specified. Dishwasher and disposal branches are set. Nail plates go on every stud the pipe crosses. The drain is then filled and held, supply pressure-tested, and rough inspection called before anything is covered.

Choosing materials

Drainage is PVC in nearly every new run, joined to existing cast iron with shielded no-hub couplings rather than a plain rubber sleeve. Where cast iron is failing, replacing the reachable length beats patching a short section of a line that is thin everywhere else.

Supply is usually half-inch PEX-A with expansion fittings, or type L copper. PEX tolerates slab movement and freeze better and needs fewer joints; copper is rigid, easy to support and easy to inspect in an open wall. CPVC from the 1990s gets brittle with age, so transitions are made at accessible points, never buried.

Stops should be quarter-turn brass, not multi-turn chrome that seizes, with braided stainless connectors. Houston water is hard, which is the real argument for stubbing a softener loop during rough-in if you may want one, and for fittings that come apart for descaling. Under a sink in this humidity, plywood cabinet boxes and a pan under the disposal outlast particleboard by a wide margin.

What moves the price

The biggest lever is whether the sink stays put. Re-piping from an existing stub in an open wall is ordinary work. Moving a sink to an island on a slab means scanning, saw-cutting, trenching, re-running drain, backfilling and patching – a different job, and on a post-tension slab it may involve an engineer.

Next, the condition of what is there. A camera run finding sound PVC is good news; cast iron with a belly turns rough-in into partial drain replacement. Fixture count moves it too – ice-maker box, filtered tap, pot filler and prep sink each add a run and a connection.

Then access, wall repair, pipe material, and permit and inspection requirements, which differ between the City of Houston and unincorporated Harris or Fort Bend County. Anyone quoting a firm number before the drain has been looked at is guessing.

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.

Where these jobs fail

The trap arm is where most of it goes wrong. Too much fall siphons the trap and the kitchen smells like the sewer on a still day. Too little and it holds water and grease. Run the arm past what the vent can serve and the seal fails no matter how neat the pipe looks.

Second is moving the sink without solving the vent. Island sinks need a proper loop vent or an air admittance valve the inspector will accept, and that is decided before the slab is cut.

Third is the stub-out that lands behind a cabinet stretcher, in a rollout drawer path, or at a height that leaves no room for a disposal and a filter canister. Dimension stub-outs off the actual cabinet drawings, not the old wall.

Fourth is a dishwasher drain with no high loop or air gap, which lets sink water track back into the machine. Fifth is cutting a post-tension slab without scanning. Sixth is skipping the hold test – a joint that weeps behind finished drywall costs far more than the hour saved.

What to expect

It starts with a walk-through: layout, cabinet drawings, and a look at the existing drain and supply. Permits are pulled where the scope requires them, and requirements are not identical across the City of Houston and the unincorporated county. Demolition opens the walls and sink base. The plumber roughs drain, vent and supply, sets stub-outs to the cabinet dimensions, and tests. Rough inspection passes before insulation and drywall close the wall. Cabinets go in, countertops are templated and set, and the plumber returns for trim-out – faucet, disposal, dishwasher, stops and supplies – with a leak check under load. To have the existing rough-in scoped before demolition, call (281) 235-6971.

Common questions

Can we move the kitchen sink to the island?

Usually yes, but it is a slab job as much as a plumbing job. The drain has to run below the slab to the existing line, which means locating post-tension tendons, saw-cutting, trenching and patching. Island venting has to be solved as well, with a loop vent or an accepted air admittance valve. Both get decided before demolition, not during.

Do we have to replace the cast iron drain?

Not automatically. A camera run tells you. Sound pipe with even fall can stay and be tied into with a shielded coupling. Scale, channelling along the bottom of the pipe, or a belly holding water means new PVC for the reachable length, because a new kitchen tied to a failing line will clog again on schedule.

PEX or copper for the supply?

Both work here. PEX-A handles slab movement and a rare freeze better, costs less to run and needs fewer joints. Copper is rigid, easy to support and stands up to heat. What matters more is fittings and stops – quarter-turn brass and braided stainless connectors – and that nothing is buried where it cannot be reached later.

Does the rough-in need an inspection?

Work at this scope is generally permitted and inspected, and the wall stays open until it passes. Requirements differ between the City of Houston and unincorporated Harris and Fort Bend County. Confirm what applies to your address before the drywall is ordered, because closing a wall early only means opening it again.

Do you cover Houston 77093?

Yes. Houston 77093 is about 20 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 — kitchen plumbing rough in in Houston, TX 77093. Call (281) 235-6971 for a site visit.

MS Home Remodeling · 1530 W Sam Houston Pkwy N, Houston, TX 77043 · (281) 235-6971 · All kitchen plumbing rough in locations