What does the plumber actually do in a kitchen or bath remodel?
Two visits, sometimes months apart. Rough-in happens with the walls open: supply and drain lines run or relocated, the shower valve set to the finished wall thickness, the closet flange set to the new floor height, everything capped and tested before an inspection if one is required. Trim-out comes at the end, after tile and cabinets: faucets, the toilet, shower trim, the disposal, the dishwasher connection.
Getting the rough-in wrong doesn’t show until the tile is on, which is why we set valves against backer board plus thinset plus tile, not against the studs.
Does moving a fixture change the cost?
On a slab house, moving a drain is the single biggest line item in a bathroom remodel. The drain and its trap sit in the concrete. Relocating them means cutting the slab, digging, re-plumbing the trap arm at slope, and patching before anything gets built on top. Moving a supply line is a much smaller job, because supply can route overhead.
Keeping the toilet or shower drain where it is, even a foot off the ideal spot, can be the difference between a straightforward remodel and one with a jackhammer in it. We’ll tell you which category a drawing falls into before you commit to it.
| Change on the drawing |
What it involves |
Permit in Red Oak? |
| Same fixtures, same places |
Rough-in check, new trim |
No |
| New faucet, sink or toilet, same spot |
Swap on existing connections |
No |
| Move a sink or vanity along the same wall |
Reroute supply, extend drain in the wall |
Yes, once lines relocate |
| Move a toilet or shower drain on a slab |
Cut concrete, re-plumb the trap, patch |
Yes, permitted and inspected |
| Add an outdoor kitchen |
New supply, drain and often a gas stub |
Yes; gas is always permitted |
Do I need a permit for remodel plumbing in Red Oak?
Not for a like-for-like fixture swap on existing connections. Yes, the moment supply or drain lines relocate, a repipe is involved, or gas is run to an outdoor kitchen. The Texas State Board of Plumbing Examiners issues the permit against a Responsible Master Plumber license, and the city inspects the rough-in before walls close. We pull it in our own name and meet the inspector; you shouldn’t have to learn that process to get a bathroom done.
How do you work with my contractor?
Inside their schedule. Demo, our rough-in, inspection, waterproofing and pan test on a shower, tile, cabinets, then our trim-out. The pan water test is the checkpoint worth insisting on: plugged, filled, left to sit, tiled only if it holds. A GC who’s worked with us knows we’ll flag a layout problem at rough-in rather than at trim. A building going up from a graded pad is new construction, sequenced differently again.
And the limit, said plainly: we don’t do tile, cabinets or electrical. A shower pan rebuild is a tile job with plumbing inside it, and a dual-fuel range needs an electrician for the 240-volt side. A shower that only needs its valve replaced isn’t a remodel at all; that’s shower repair. We’ll tell you which you have while the plan is still a sketch, not on install day.