New Construction Plumbing
Building a new home or commercial space? We provide complete plumbing installation from the ground up with expert planning.
Free estimates on most services · We answer 24/7
New construction plumbing in Austin — from the slab up
New-build plumbing is three jobs in sequence: the underground rough-in before the slab is poured, the top-out once the frame is up, and the trim-out after the finishes are in — each with its own inspection. JB Plumbing plans and installs complete plumbing systems for new homes, additions and light-commercial spaces across Austin and Travis County, working from your plans and to the local code.
The three phases
Underground. Drain, waste and vent lines and the water service set in the ground before the slab, pressure- and water-tested for the inspector. Getting slopes, cleanouts and stub-up locations exactly right here saves everything downstream. Top-out. Supply lines, vents through the roof, tub and shower valves, washer boxes and gas piping installed in the framed walls, tested and inspected before drywall. Trim-out. Fixtures, water heater, disposal and appliance connections installed and tested once the finishes are in, then the final inspection.
Built for Central Texas
Slab-on-grade foundations on expansive clay are the regional norm, and the plumbing has to be planned for it — sleeved penetrations, correct bedding, PEX or properly protected copper, and cleanouts where a future plumber can reach them. Water heaters go where the pan can drain. We build the system we’d want to service later.
Working with builders and owners
We work from your plans, flag conflicts before they’re poured in concrete, coordinate inspections with the schedule, and keep you informed at each phase. For owner-builders, we’ll walk you through what each inspection needs and when.
Talk to us early
Send the plans or call (512) 663-3049. Estimates are free on most services and the price is upfront.
What’s included
Underground, top-out & trim
All three phases, each tested and inspected in sequence.
Plan review
Conflicts flagged before anything is poured in concrete.
Homes, additions & light commercial
Residential builds, ADUs and additions, small commercial spaces.
Built to be serviced
Cleanouts, shutoffs and pans where a future plumber can reach them.
Burst pipe? Water everywhere?
Shut off the water if you can, then call us — we answer 24/7 and most calls are returned within the hour.
Real person, day or night.
What happens when you call
Step 1: Tell us what’s going on
Call or send the request form. Say what you’re seeing, whether the water is off, and where you are — we answer 24 hours a day.
Step 2: We get a plumber to you
Emergencies come first; for everything else we agree a time that suits you. Most calls are returned within the hour.
Step 3: You get a straight answer
We diagnose before we recommend, explain the options in plain English, and price the work upfront. Estimates are free on most services.
New Construction Plumbing questions, answered
What are the phases of new-construction plumbing?▼
Underground rough-in before the slab, top-out in the framed walls, and trim-out after finishes — each inspected before the next stage of construction proceeds.
Do you work with general contractors and builders?▼
Yes — we work from your plans, coordinate inspections with your schedule, and flag conflicts early.
Do you plumb additions and ADUs?▼
Yes. Additions and accessory dwelling units follow the same phased process, tied into the existing system where the code and the layout allow.
Can you help an owner-builder?▼
Yes. We’ll explain what each inspection requires and when, so the plumbing never holds up the build.