Change order vs contract amendment: the difference
Updated November 10, 2026
This is general information, not legal advice. Your contract and your state’s laws decide what applies to you. Talk to a lawyer about your specific contract.
Both a change order and a contract amendment change an agreement that is already signed. The difference is mostly about what they change and the process they follow.
Change order
A change order changes the work: the scope, the price for that scope, or the schedule. Most construction contracts expect them and include a clause that says how they happen, usually “in writing, signed by both parties, before the work is performed.” Because the contract already set up the process, a change order is a routine document.
Typical change orders: added work, removed work with a credit, substituted materials, hidden conditions, schedule extensions tied to the change.
Contract amendment
An amendment changes the terms of the agreement itself: payment schedule, warranty terms, who is responsible for permits, dispute resolution, the parties to the contract. It is a change to the rules, not to the work.
A quick way to tell
| Situation | Usually |
|---|---|
| Client wants a different vanity | Change order |
| Rot found behind the drywall | Change order |
| Moving from 3 progress payments to 5 | Amendment |
| Extending the warranty period | Amendment |
| Adding a second homeowner to the contract | Amendment |
Why it matters
If your contract has a change order clause, following it exactly is what makes your extra charges collectible. Many disputes over remodeling invoices come down to whether the change was approved the way the contract required. Read your change order clause and make your process match it: written, signed, before the work.
Electronic signatures
In the US, the federal ESIGN Act and the state laws based on the Uniform Electronic Transactions Act generally give electronic signatures the same effect as ink ones, with some exceptions. Whether a typed-name approval satisfies your particular contract is a question for your contract and your lawyer. What you can control is the record: what the client saw, who answered, and when.
Want the client’s yes on record without printing anything? SignedChangeOrders is free for 3 change orders a month, or grab the free printable change order template.