Plumbing paperwork, done properly

Plumbing estimates get disputed over two things: what the fixture actually is, and what happened when you opened the wall. Write the fixture make and model so nobody assumes the builder-grade version, and name the code upgrades a modern install triggers — expansion tank, pan and drain, seismic strapping — before the inspector does. A homeowner who reads those on your estimate understands why the cheap bid is cheap.

Pick your document

  • Plumbing estimate

    An estimate is your best professional judgment of what a job will cost, given before the work starts.

  • Plumbing quote

    A quote is a fixed price for a defined scope of work — the number does not move unless the scope does.

  • Plumbing invoice

    An invoice is the request for payment once the work is done — the document that actually gets you paid.

What belongs on plumber paperwork

  • Fixture make, model and finish — "toilet" and "comfort-height elongated, brushed nickel trim" are different bids
  • Code upgrades the install may trigger: expansion tank, pressure-reducing valve, pan and drain line
  • The exact fixture by model and finish, since a fixed price is fixed against a named product
  • Confirmed access — you have seen the shutoff, the clearance and the connection type
  • Model and serial of what went in, with the commissioning date beside it
  • The installation date itself, which is what a manufacturer asks for on a warranty claim

How plumbers price work

Residential plumbing splits between flat-rate task pricing and hourly service work. Flat-rate is the norm for known jobs — a water heater swap, a toilet install — because the customer wants a number before you start. Hourly with a service-call minimum fits diagnostics and anything behind a wall. The honest middle ground is a flat price with a stated allowance for what you cannot see.

The builder ships with 12 plumbing line items to start from, grouped into 3 sections. Edit the rates once and they save to your own price book.

Open the Plumbing builder

Questions

Should a plumbing estimate include drywall repair?
Only if you are actually doing it — and say so either way. "Access holes cut as required; drywall repair and paint by others" on the estimate prevents the most common plumbing dispute there is, which is a customer expecting to get their wall back finished.
When can I quote plumbing work at a fixed price?
When access is confirmed and the product is chosen: a fixture swap or a water heater replacement where you have seen the shutoff, the clearance and the connection. Fix the price on the fixture and the labor, then carry a separate stated allowance for code upgrades so the headline number holds and inspector-driven additions are priced honestly rather than absorbed.
What should a plumbing invoice record about the fixture installed?
The model and the date, because fixture and heater warranties run from installation and the homeowner will not have kept the box. If you replaced a water heater, the invoice is also the document a home inspector will ask for at resale, so it is worth more than the payment it collects.