Plumbing rough-in cost calculator

Plumbing rough-in — fixture count is the right unit

Plumbing pros price rough-in by fixture unit, not by linear foot of pipe. A "fixture" is each connection point: toilet, sink, shower, tub, washer hookup, dishwasher, hose bib, fridge ice line. The rate per fixture covers supply, drain, vent, and shut-off — all the way to where the finish plumber takes over.

Industry rate ranges (2025)

• New construction: $700-1,200 per fixture. Open framing, predictable runs.
• Remodel (open walls): $900-1,400 per fixture. Existing framing dictates routing.
• Remodel (closed walls / partial demo): $1,200-1,800 per fixture. Wall opening + patch eats time.

Multipliers: PEX is cheaper than copper (~30%). Manifold home runs are cleaner but need extra material. Old galvanized replacement adds ~50% because every line gets touched.

What's NOT in this number

• The water heater itself (separate line — tank vs tankless is a 2-3× spread)
• Sewer line replacement (different trade often, $50-150/linear foot)
• Septic system anything
• Backflow prevention if required by jurisdiction
• Finish plumbing (toilets, faucets, tub/shower trim) — typically $200-400 per fixture in additional labor on top of fixture cost

Permit reality

A plumbing permit is required for any new fixture, any re-route, any water heater swap (in most jurisdictions). $200-500 typical. Failed inspections cost a re-trip ($150-300) and time. Don't skip — it's the cheapest insurance in construction.