Plumbing for San Jose bathroom remodels
We handle the plumbing side of a remodel, from moving fixtures to passing rough-in, so your contractor builds on pipe that will last.
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Perfect Tankless Plumbing, San Jose, CA
Bathroom remodel plumbing in San Jose covers relocating drains and supply lines, installing new valves and fixtures, and passing the city's rough-in inspection; it is permitted work, and inspectors verify details like long-sweep drain fittings before walls are closed.
Updated September 2026
Fixtures & Bath
The plumbing decisions that shape a remodel
Moving a toilet a foot or turning a tub into a walk-in shower sounds cosmetic, but it changes drains, vents and supply routing. In a raised-floor house that work happens in the crawl space. In a slab house it means cutting concrete, which changes both the cost and the timeline.
We plan the plumbing with you or your contractor before demolition, so the layout works for the pipes and the inspector, and any old galvanized or cast iron found behind the walls is replaced while it is exposed.
Cost factors
What moves the plumbing cost of a remodel
Plumbing is one line in a remodel budget; the city permit alone is a real figure worth planning for.
- Permit fees (San Jose)$350 to $800 for sewer, repipe or water heater permits. Planning range from proplumbersanjose.com, not our quote.
- Fixtures moved. each relocation adds drain, vent and supply work
- Slab or crawl space. cutting concrete costs more than working from below
- Old pipe found. galvanized or cast iron replaced while walls are open
- Shower conversion. recessed drains and valve relocation
- Fixture choices. thermostatic valves and body sprays need more rough-in
- Inspection corrections. rare when planned, but they take time
Included
What our remodel plumbing covers
- Layout review before demolition
- Plumbing permit with the City of San Jose
- Drain and vent relocation
- Supply lines and shutoffs
- Shower and tub valve rough-in
- Rough-in inspection
- Fixture set and final pressure test
Relocating fixtures
Every fixture that moves needs a drain with the right slope, a vent within the allowed distance, and a supply line. On a crawl space house, relocating a toilet or vanity is usually straightforward from below. On a slab house, the floor is cut and trenched, the new drain set and inspected, and the concrete patched before tile. We tell you early which moves are simple and which are expensive, so the design is made with the real plumbing cost in mind rather than discovered halfway through demolition.
Rough-in and inspection
Rough-in is the plumbing that lives inside the walls and floor: drains, vents, supply lines and valve bodies set at the right heights for the fixtures you have chosen. The City of San Jose inspects it before walls are closed, checking slope, venting, fittings and a pressure or water test. We schedule the inspection, meet the inspector, and correct anything flagged the same day where we can, so the tile setter and the drywall crew are not left waiting on a failed inspection.
Accessible shower conversion
Converting a tub to a curbless or low-curb shower means recessing or sloping the floor to a linear or center drain, relocating the valve to reachable height, and often adding blocking for grab bars. On a slab that recess is cut into the concrete; on a raised floor it is built into the framing. We set the drain and valve to suit the finished floor height and coordinate with the waterproofing so the pan, the membrane and the drain work together as one watertight system.
Local context
Remodeling slab-built Eichlers and older San Jose homes
San Jose has around 500 Eichler homes, most of them in Willow Glen tracts like Fairglen, and all of them are built on slabs with radiant heating pipes cast into the concrete. Moving a bathroom drain in one of those houses means locating the radiant loops before any cutting starts. In older houses elsewhere, cast iron drains are often near their fifty-year limit, and inspectors check that new horizontal drain turns use long-sweep fittings under California Plumbing Code 706.3.
How the job runs
How remodel plumbing runs
- 1
Plan the layout
Confirm what can move and what it costs.
- 2
Pull the permit
Plumbing permit filed with the city.
- 3
Demo and assess
See what pipe is behind the walls.
- 4
Rough in
Drains, vents, supplies and valves set.
- 5
Pass inspection
We meet the inspector before walls close.
- 6
Set fixtures
Toilet, vanity, trim and a final test.
Timing
How long the plumbing part takes
For a remodel that keeps fixtures in place, rough-in is often a day or two, plus inspection scheduling. Moving fixtures on a raised floor adds a day or so.
Slab work takes longer: cutting, trenching, inspecting the new drain and patching the concrete before tile can start. The city's inspection calendar is the part nobody controls, so we book it as early as the work allows.
FAQ
Bathroom Remodel Plumbing questions from San Jose homeowners
Yes, when drains, vents or supply lines are altered. Rough-in is inspected before walls close.
Usually. On a raised floor it's straightforward; on a slab it means cutting and patching concrete.
If galvanized supply or cast iron drains are exposed and aging, replacing them while the walls are open costs far less than later.
Yes. We handle the plumbing scope and coordinate with the general contractor and tile setter.
Yes, including recessed drains and relocated valves for curbless designs.
Same family
Related work in fixtures & bath
Toilet Installation and Repair
Running toilet parts, Wax ring and rocking base.
How we handle toilet installation and repairSump Pump Installation
Crawl space pump, Battery backup.
Crawl space pump and related workShower Repair
Shower valve replacement, Cartridge and diverter.
How we handle shower repairGarbage Disposal Installation
Jammed or humming disposal, New disposal install.
Jammed or humming disposal and related workBathtub Installation and Repair
Tub drain and overflow, Tub to shower conversion.
Bathtub Installation and Repair
One number, any hour
Plan the plumbing before the tile
Call and tell us what you are changing. We will tell you what the pipes need.
