A change order is a written amendment to a construction contract. It documents work that was added, removed, or changed after the original agreement was signed — along with the new price and, when relevant, the new schedule. Once both the contractor and the customer sign it, the change legally becomes part of the contract.
Why change orders exist
No estimate survives contact with a real job. You open a wall and find rotten framing. The customer decides mid-project they want the upgraded fixtures. The inspector requires something the plans didn’t show. Each of those changes costs money, and the change order is how that cost gets agreed on before it becomes an argument.
What a change order includes
- Who and where: customer name and the job / site address
- What changed: a clear description of the added or removed work
- Line items: materials, labor, and credits with quantities and prices
- The new total: how the contract price changes
- Why: the reason for the change (hidden damage, customer request, code requirement)
- Signatures and date: both parties, before the extra work starts
What happens if you skip it
Verbal approvals feel fine in the moment — the customer is standing right there nodding. Months later, at final invoice, memory gets selective: “I never agreed to that.” Without a signed record, you’re negotiating from weakness: eat the cost, discount it, or fight about it. Many contracts even state that extra work isn’t billable without a written, signed change order — meaning a verbal OK may be worth exactly nothing.
Change order vs. estimate vs. invoice
An estimate proposes the original scope before the contract. A change order amends the scope mid-project. An invoice bills for what was done. The change order is the one contractors skip most — and the one that decides whether the extra work on the invoice actually gets paid.
The practical problem: paperwork on a job site
The classic failure isn’t that contractors don’t know this — it’s that writing a document, printing it, and collecting a signature is a hassle when you’re standing in a crawl space. That’s the gap a phone-based tool closes: describe the work, price it, and capture the signature on the spot, while everyone still agrees.
Create your next change order in under a minute
ScopeProof turns this whole document into a few taps: line items auto-total, the customer signs on your phone, and a PDF lands in their inbox before you leave. Free for up to 3 active change orders.
