How to write a change order that does not start a fight

September 3, 2026 · Joshua Hill

A change order needs five things on one page: what changed, why it changed, the price, the effect on the schedule, and a signature from the customer before the extra work starts. Fights almost never come from the price itself. They come from a customer finding out about the price after the work is already done.

Why change orders turn into arguments

Your customer agreed to a number and planned their money around it. When a second number shows up, most customers are not really asking whether the work was necessary. They are asking whether they were given a choice about it. Every bad change order conversation lives in the gap between the moment you knew and the moment they knew.

The other cause is vague wording. A line that reads "additional prep as needed" is not a scope, it is an invoice waiting to be disputed. If the customer cannot read the line and picture the actual work, they will imagine the smallest possible version of it and feel taken when the bill reflects the real one.

The five things every change order needs

Keep it to one page in the same format every time, so the customer learns to read it quickly instead of bracing for it.

• What changed, in plain words, tied to the original estimate line it modifies
• Why it changed: a hidden condition you found, a customer request, an inspector or code requirement, or a material substitution
• The price, split into labor and materials the same way your original estimate was split
• The schedule effect in days, including zero when there is none
• Signature and date lines for both sides, plus the original contract or job number

Add a photo whenever there is something to show. A picture of the rot behind the siding does most of the arguing for you, and it settles the question of whether the work was really needed before that question gets asked out loud.

Get the signature before the work happens

This is the rule that decides whether you collect. The moment your crew finds the problem, they stop, photograph it, and tell you. You send the change order that day and wait for a yes in writing. A text reply that says "approved" is worth far more than a verbal go ahead in a driveway, and in many states a change order that was never put in writing is difficult to enforce if the customer decides to contest it.

Waiting costs you in a quieter way too. Work performed before approval hands the customer a reason to negotiate after the fact, because the leverage flips the second the work is finished. Nobody haggles over a repair that has not happened yet.

Write it so it does not read like a penalty

Lead with what you found and what happens if it is left alone, then give the number. A customer who understands the consequence reads the price as a decision they get to make. A customer who only sees a price reads it as your mistake landing on their bill.

Then give them the option to decline in writing. Say plainly what you will do if they pass, including any part of your warranty that will not cover the affected area. That one sentence turns an argument into a choice, and it protects you later. The same restraint that keeps you from blurting a number on the phone applies here, and we covered that in how to answer the price question.

What we do in our own companies

We run painting and flooring companies in Bellingham along with the licensed Washington general contractor they operate under, and the rule on our jobs is that nothing extra gets done until the customer has approved it in writing. The crew photographs the condition, the change order goes out the same day from the field, and the approval lands in the job file next to the original estimate, so the final invoice never contains a line the customer has not already seen.

Speed is what makes that workable. If a change order takes two days to write, the crew stands around or quietly does the work anyway, which is how the habit breaks. Ours goes out from a phone in a few minutes because the format never changes and the pricing comes from the same numbers that built the estimate, which is the point of running quoting and follow up on one system. What we cannot tell you is what your state requires, since change order and warranty rules vary by state and by contract. Have your own contract reviewed once by an attorney who works with contractors, then use the format above inside whatever that review tells you.

Change orders priced from the same rate table as the original bid are part of the estimating and proposals build.