A plumbing estimate, line by line

Three calls, three different documents. A water heater swap is a known task with a known part. A bath remodel is two visits, an inspection, and fixtures somebody else is buying. A sewer repair starts as a camera inspection and only becomes an estimate once you have seen the break.

Here they are, written the way a homeowner would receive them. Every dollar figure is invented to keep the arithmetic readable. Your prices come from your own price book and supply house; permit fees come from whoever issues them. For hourly and flat-rate plumbing pricing, see plumber hourly rates and DoneQuote for plumbers.

A failed 50-gallon gas water heater in the garage

Fairview Plumbing & Drain LLC · 2140 Coleman Ave, Raleigh, NC · (919) 555-0148 · Plumbing license #[your number], licensed and insured Estimate #2026-318 · Issued August 23, 2026 · Valid through September 22, 2026

For: M. Alvarez, 812 Ridge Crest Dr

(Most states issue plumbing licenses statewide. A few — New York, Pennsylvania, Missouri and Kansas among them — leave it to cities and counties. Put whatever number your jurisdiction gave you on the letterhead.)

Scope: Same-day replacement, tank to tank, existing vent and gas location.

Subtotal: $2,095, plus sales tax where your state charges it — see the note below.

Included: everything in the table, plus inspection attendance and a one-year warranty on our labor.

Not included: gas line repairs upstream of the shutoff, electrical work, drywall or paint at the vent penetration, water treatment or a recirculation pump.

Payment: due on completion. No deposit on same-day replacements.

A hall bath remodel, rough-in through trim-out

Your scope is a fraction of this remodel, and the customer is holding estimates from a tile setter and an electrician too. Say where your work stops.

Subtotal: $3,511 plus applicable tax

Included: two trips (rough-in and trim-out), all pipe, fittings, valves and hangers, inspection attendance.

Not included: fixtures and finish trim, which the owner is supplying; shower pan and tile; framing changes needed to reroute the drain; drywall patching; the exhaust fan and any electrical.

Owner-furnished fixtures: the trim line reads "install only, owner-furnished", not "supply and install". We warrant our installation. A defective faucet goes back to the manufacturer, and the second trip to swap it is billed at our service rate.

A sewer lateral repair, priced after the camera

The inspection is its own line, credited against the repair if the customer goes ahead.

Subtotal: $3,054, less the $325 inspection already paid

Not included: sod, landscaping and irrigation repair; sawcut or replacement of driveway and sidewalk; root removal outside the dig area; any defect found beyond this 8 ft section.

Assumptions: we call 811 for a locate before we dig, and this price holds if the marks come back clear of the trench. Gas or fiber crossing the dig changes the method and the price.

What a plumbing line item has to say

Name the part. "Water heater" invites a lowball comparison. Gallon capacity, fuel, vent type and warranty term let a customer see that the shop quoting $400 less is quoting a different heater.

Keep permits at cost on their own line. Customers rarely argue with a fee you are passing through, and burying it in a labor number makes the labor number look wrong.

Handle tax the way your state says to. Whether plumbing labor is taxable, whether repair and new construction are treated differently, and whether you buy materials tax-free for resale or pay tax at the counter all vary by state — and sometimes by whether your contract is lump-sum or separated. Ask your state revenue department and a CPA who works with contractors, then build it into your template once.

When the wall comes open and the scope changes

Old pipe hides things. Say on the estimate what happens when it does — that conversation is harder standing in a wet crawlspace. Three ways to write it, and they do different jobs:

• Exclusion. "Repairs to piping outside the areas listed above are not included." Clean, but you still have to stop and price the work.
• Allowance. A dollar amount carried in the total for a risk you can name, settled up or down at the end. Good when you know galvanized is behind the wall but not how much of it.
• Unit price. A per-foot or per-fitting rate agreed in advance, applied to whatever you find. Best when you know the work but not the quantity.

Whichever you use, no extra work starts without an approved change order — a photo, a scope line, a price and a signature. Some states require change orders on residential contracts to be in writing to be enforceable, and several require specific notices or cancellation language on home improvement contracts above a dollar threshold. Your state licensing board or a local construction attorney can tell you which apply.

Warranty language that survives a callback

Split it in two. Your labor warranty is mostly yours to set — one or two years is common — and it belongs on the estimate, not just in your head. Mostly, not entirely: many states read an implied warranty of workmanlike quality into residential work, and they differ on whether a contract can disclaim it, limit it, or replace it with an express warranty. Ask a local construction attorney what yours can and cannot do.

The part carries the manufacturer's warranty, which you pass through — and register, if that manufacturer makes registration a condition of the full term. Then name what falls outside both: water quality, freeze, tree roots, sewer misuse, or a fixture the customer bought. A callback you excluded in writing is a service call. One you did not is free work.

Keeping the estimate and the price book in sync

You have written most of these lines before — the same heater task, the same rough-in scope, the same exclusions. Load them into DoneQuote once, or upload the price list you already keep and let it read them in. Each task then carries its wording, its price and its exclusions every time you pull it. When your supply house moves the price of a heater, you change it in one place, and the number you meant to charge is the one that reaches the customer — on an estimate, a work order or an invoice.