TL;DR: New construction plumbing in Utah County runs $12,000–$25,000+ for a custom home based on industry estimates, plan review, groundwork, rough-in, top-out, and trim, inspected at every stage. Builders get a sub who hits schedule; owner-builders get sequencing guidance. Call 801-874-8479.
What are the five phases of new-construction plumbing?
Plan review (fixture counts, line sizing, water-heater and treatment decisions while they are cheap), groundwork (under-slab drains before concrete), rough-in (supply, drains, vents in open framing, first inspection), top-out (stacks and tests), and trim (fixtures set after finishes, final inspection). Santaquin, Salem, and Mapleton’s active subdivisions keep this phase list on repeat for our crews.
What should you decide at the plans stage?
The cheap-now items: a softener loop (near-zero cost in framing, hundreds later), tankless vs tank and where it lives, radiant floor zones, hose bib count, and future basement-bath stub-outs. Utah County’s hard water makes the treatment stub the single best dollar in the plan.
Why do builders keep a standing plumbing sub?
Schedule. A missed rough-in inspection stalls framing, insulation, and drywall behind it. Utah Service Pros (DOPL #14060509-5501) prices from plans, shows up on the framing schedule, and passes inspections the first time. Part of remodel & new-construction plumbing: 801-874-8479.
Expert-reviewed by Utah Service Pros. Last updated June 2026.