Why is the diagnostic its own line?
Finding the problem and fixing it are different work. A separate diagnostic line gets paid even when the customer declines the repair, and makes the repair price easier to compare.
Plumbing · Free estimate sample
This is the general shape of a plumbing estimate — the five categories most plumbing jobs break into, written so a customer can see where the number comes from. The figures are placeholders. Open the template in Stubsmith and replace them with your own scope and pricing.
Common practice
Each category separates a decision that can change scope, price, or what the customer expects.
Finding the problem and fixing it are different work. A separate diagnostic line gets paid even when the customer declines the repair, and makes the repair price easier to compare.
Customers accept labor rates more easily when materials aren't hidden inside them. It also protects you when the owner wants to supply their own fixture — the labor line stays the same.
Both are costs customers forget to expect. Showing them explains part of the gap between a licensed bid and a cash job, and defines what a change order looks like before the work starts.
Before you send it
Plumbing is one of the most tightly licensed trades. The document looks the same everywhere; what sits behind it doesn't.
General information, not legal, tax, or licensing advice. Requirements differ by state, county, and city and change over time. Confirm with your state licensing board and the local authority having jurisdiction before relying on any of this.
Estimator notes
For small service work, a combined installed price per line is common and protects your margin. Separate them when the owner supplies fixtures, on time-and-material work, or when a GC or property manager requires the breakdown.
30 days is standard. Fixture and water-heater pricing moves enough that an open-ended estimate can lock you into last quarter's cost.
If the job needs one, yes — as its own line or clearly folded into the install price. Adding it later is one of the fastest ways to lose trust.
Anything you can't see or price until the job is open: pipe condition inside walls, code upgrades an inspector may require, and finish repair. If it can surprise you, exclude it in writing.