What actually goes on a plumbing estimate

An estimate does two jobs. It wins the work, and it settles the argument you haven't had yet. Most estimates do the first one and skip the second.

Here is what belongs on the page.

1. Who you are, in a way that can be checked

Business name, physical address, phone, and your license number where your state requires it to appear. A customer comparing three estimates uses this to tell the real contractor from the guy with a magnet on his truck.

2. Who the customer is, and where the work is

The billing name and the job address are often not the same — rentals, property managers, a daughter paying for her father's house. Get both. Every argument about who owes the money starts here.

3. A date, and an expiry

Copper moves. A fixture you quoted in March may cost noticeably more by July. An estimate with no expiry is an open offer, and some customers will hold you to one from eight months ago. Thirty days is common and defensible.

4. The scope, written as what you will do

Not "bathroom remodel". Something a stranger could read and know whether a given task is included:

Remove existing tub and surround. Install owner-supplied 60" alcove tub, new valve and trim, new drain assembly. Tile and finish work by others.

The phrase "by others" is doing more work in that paragraph than anything else on the page.

5. Line items, separated

Parts and labor, broken out enough that each line can be questioned on its own. This matters for the customer, who wants to understand, and it matters for you when they ask to cut the price — you can take a line out instead of discounting the whole job.

6. What you are assuming

Every estimate rests on things you believe but haven't verified. Write them down:

• that the shut-off works
• that there is access to the crawlspace
• that the existing drain line is the size it appears to be
• that the walls open up without asbestos or knob-and-tube behind them

This is the single highest-value paragraph in the document. It converts a future fight into a line the customer already read and accepted.

7. What is explicitly excluded

Permits, if you are not pulling them. Drywall repair. Painting. Restoring landscaping after a line is dug. Disposal of anything the customer wants to keep. Write the exclusions even when they seem obvious — especially when they seem obvious, because "obvious" is exactly what people disagree about.

8. Payment terms

When money is due, how much up front if any, and what happens when it is late. "Net 15" means nothing to a homeowner; "payment due on completion" is clearer. If you are taking a deposit, say what it covers — material ordering is the usual honest answer.

9. The warranty, with a boundary

What you warrant, for how long, and what voids it. A manufacturer's warranty on a part is not your warranty on the labor, and customers conflate the two constantly unless the page separates them.

The three that end up in court

Looking at what actually goes wrong on residential plumbing work, three of the above do the heavy lifting:

The assumptions. Almost every change-order dispute is an assumption that was true in your head and nowhere else.

The exclusions. The customer thought the wall would be put back. You never said you would. Both of you are being honest and you still have a problem.

The expiry. Material pricing moved, the customer calls in the autumn with your spring number, and now you are either eating the difference or starting the relationship with a fight.

None of the three cost anything to include. All three take effort to type on a phone, standing in a stranger's hallway, which is why they get skipped.

Say it once, out loud

The reason most estimates are three lines is not ignorance. It is the keyboard.

Pro Speak Artisan is built around that: you describe the job in plain speech, and a model tuned for your trade turns it into the structured lines, pulling prices from your own catalog. The assumptions and exclusions you dictate stay on the document. The customer gets a signed approval link, accepts from their phone, and the invoice is issued from the estimate they agreed to — same lines, same totals.

A nine-element estimate is not more honest than a three-line one. It is just harder to argue with, which amounts to the same thing six months later.