Fixture counts, linear footage, and service-call pricing. Choose a project type below for a complete step-by-step guide with formulas, waste factors, productivity benchmarks, and pro tips.
Plumbing pricing is fixture-based for most residential work and linear-foot-based for new runs of supply and DWV. A bathroom remodel quote is built fixture by fixture: water closet, lavatory, tub or shower valve, drain, vent — each with a flat install rate that includes hookup time but excludes wall opening or rough-in beyond standard. New construction rough-ins are typically bid per fixture unit (DFU) or by fixture count once the layout is known. Service calls follow a different model entirely: a flat trip charge that covers diagnosis and the first 15–30 minutes, then time-and-materials beyond that. Flat-rate books are common in service plumbing and let techs quote the customer at the truck without a calculator. The biggest margin leak is non-billable time: pulling permits, waiting for inspection, driving to the supply house mid-job. A typical residential job loses 1–3 hours of non-billable overhead that has to be priced into the fixture rate or it's gone. The trade differs from gas fitters (separate license in most jurisdictions), drain cleaners (no pipe modification), and HVAC techs (refrigerant work, not water). Fixture protection — drop cloths, shut-off testing, isolating zones — is part of every job and is routinely undercharged. Material spec matters too: PEX runs 30–40% faster to install than copper but costs less, so the labor savings often go to the customer instead of the plumber.
Every fixture has a flat install rate. Two-handle valves are faster than thermostatic; pressure-balance is faster than thermostatic with diverter. Get specific in the takeoff.
Slab plumbing means jackhammer time and concrete patching. Crawlspace is uncomfortable but accessible. Second-floor work above finished ceilings often means ceiling repair on the next trade.
Permit pull and inspection wait can run 1–3 hours of non-billable time. Some jurisdictions require multiple inspections (rough, top-out, final). Always price these in.
PEX vs. copper changes labor by 30–40%. CPVC is faster than copper but slower than PEX. Material choice often comes from the spec sheet, not your preference — confirm before quoting.
Pulling, waiting, and meeting inspectors is real labor. Build it into the fixture rate or add it as a job-level line.
Trip fees should cover diagnosis, drive time, and first-half-hour labor. A flat $89 trip on a 45-minute drive is a loss.
Drop cloths, drain plugs, shut-off testing, and isolating zones are real time. Build it into setup or charge for it explicitly.
Bathroom plumbing estimates cover rough-in, fixture installation, and finish connections. Existing rough-in location is the primary variable — moving drain or supply locations multiplies labor significantly.
Water heater replacement is one of the most standardized plumbing jobs — but expansion tanks, permit requirements, and venting changes can significantly affect the final price.