5 Mistakes Builders Make with Change Orders (and How to Avoid Them)

Change orders are one of the most consequential pieces of any construction project...and one of the most commonly mishandled. Done well, they protect margins, clarify expectations, and keep projects moving. Done poorly, they cause disputes, delays, and lost revenue.

Most change order problems don't come from a single dramatic failure. They come from small, repeated mistakes that get baked into how a team works.

Below are five of the most common mistakes—and what to do instead.

1. Relying on Verbal Agreements

2. Vague or Incomplete Scope Descriptions

3. Skipping the Internal Review

4. Treating Change Orders as Internal-Only

5. Losing Track of Cumulative Impact

1. Relying on Verbal Agreements

The Mistake

A client mentions they'd like to upgrade a fixture during a walkthrough. The project manager nods, says "no problem, we'll handle it," and the work gets done. Three weeks later, the client questions the line item on the invoice.

This is the single most common change order failure in residential construction, and it's also the most expensive. Without written documentation, the contractor is left trying to prove that work was authorized—usually without much to back him up. Even when the client doesn't dispute the work itself, they often dispute the cost, the timeline impact, or whether they really agreed to all of it.

What To Do Instead 

Treat every change as a documented event, no matter how small or how casual the request. A two-line written confirmation—emailed, signed, or logged in your project management system—is enough to protect both sides. Build a habit on your team: no work proceeds on a change until something is in writing.

The friction of writing it down is far less than the friction of arguing about it later.

2. Vague or Incomplete Scope Descriptions

The Mistake

A change order reads "Upgrade master bath fixtures — $3,200." The client signs it. Three weeks later, they're asking why the upgrade didn't include a new vanity faucet, and the contractor is explaining that "fixtures" meant the showerhead and tub spout only.

Vague scope language is one of the most reliable sources of disputes in construction. When a change order doesn't spell out exactly what's included (and just as importantly, what isn't) there's room for the client and the contractor to walk away with different understandings of the same document.

What To Do Instead

Write change order descriptions with the assumption that someone unfamiliar with the project will have to read them. List specific items, quantities, finishes, brands, and locations. Where useful, explicitly state exclusions ("does not include relocating plumbing rough-ins"). When in doubt, attach a marked-up drawing or a photo to the change order.

A good test: if you handed the change order to a new project manager who'd never been on the job, could they execute it correctly with no additional context? If not, it needs more detail.

3. Skipping the Internal Review

The Mistake

Under pressure, a project manager prices out a change, sends it directly to the client, and gets it approved. A week into execution, accounting flags that the markup was calculated incorrectly, or a sub points out that the change has ripple effects on adjacent trades that weren't accounted for originally.

Now the contractor is in an awkward position: either absorb the cost, or go back to the client with a revised change order and explain why the first one was wrong. Neither option is good. The first hurts margins; the second hurts the client relationship.

What To Do Instead

Build internal review into the change order workflow as a required step, not an optional one. The review doesn't have to be elaborate—on smaller changes, it might just be a project manager double-checking the pricing against a checklist before sending. On larger changes, it might involve different departments (like estimating, accounting, and operations) weighing in.

Either way, the point is that a structured pause happens on every change order, allowing a time for internal alignment before the change order gets in front of the client. That purposeful pause is when problematic errors and costly oversights are caught, while they can still be rectified. 

4. Treating Change Orders as Internal-Only

The Mistake

A change order is logged in the project management system, priced out, and approved internally. The work gets done, the cost gets tracked against the budget, and everyone on the team knows about it. But the client never receives a formal change order document—just a verbal confirmation during a site visit and a line item on the next invoice.

A change order isn't just an internal accounting tool—it's a contract amendment. It modifies the original agreement between the contractor and the client, and it needs to be treated with the same formality as the original contract. When it lives exclusively in internal systems, it loses the legal and contractual weight it's meant to carry. The client may understand that something changed, but there's no record showing that they fully agreed to the specific scope, cost, or timeline impact in a way that holds up if questioned later. 

What To Do Instead

Present every change order as a professional, client-ready document. That means a clean format, the contractor's branding, clear identification of the project and the parties involved, itemized pricing, revised contract totals, any timeline adjustments, and a clearly designated signature space.

Electronic signature workflows handle this well. They offer a user-friendly way to capture an unambiguous approval and create an audit trail that protects everyone involved.  The change order should always exist in two places: as a tracked item in your internal system, and as a signed contract amendment in the client's hands. 

5. Losing Track of Cumulative Impact

The Mistake

Separately, individual change orders may seem modest—a small percentage of the contract here, a few extra workdays there. None of that seems alarming in isolation. But by month four of an eight-month project, the team realizes the project is running 7% over the original contract amount and three weeks behind schedule, and no one has communicated that clearly to the client. 

Change orders accumulate. A project that runs 10–15% over its original contract because of legitimate, properly-documented change orders isn't a problem—that's normal. A project where neither the contractor nor the client has a current, accurate view of the adjusted contract total is a problem, even if every individual change was handled correctly.

What To Do Instead

Track change orders in aggregate, not just individually. After every approved change, the working contract sum, the working contract timeline, and the count of pending changes should all be visible to whoever's managing the project. Many builders include a brief change order summary in their regular client updates: "As of this week, we have eight approved change orders totaling $24,300 and adding nine workdays. The current adjusted contract sum is $487,300 with a projected completion date of [MM/DD/YYYY]."

That kind of running visibility prevents the surprise conversation at the end of the project—the one where the client says "I had no idea we'd added that much."

Bringing It All Together

These five mistakes share a common thread: they're all consequences of treating change orders as administrative paperwork rather than as the financial and contractual control mechanism they're meant to be. The fix in every case is the same—bring more discipline, more structure, and more visibility to the process.

Construction management software helps make that discipline easier to maintain. ConstructionOnline™ allows teams to log change orders the moment they come up, document them with itemized detail, route them through internal review, present them as professional client-facing contracts, capture electronic signatures, communicate updates to assigned resources, and track cumulative impact against the original contract—all in one connected project management platform.

The result is fewer disputes, faster approvals, and a clearer picture of project finances at every stage.

Read On: For a foundational overview of what change orders are and what they should include, see Change Orders 101: Everything You Need to Know.

Want a closer look at better change order management?

Join us on Tuesday, May 19 at 12:00 PM ET for a free webinar—Discover Better Change Order Management in ConstructionOnline. We'll walk through best practices for documenting, presenting, and approving construction change orders, plus we'll take a first look at ConstructionOnline's modernized Change Order toolkit. You'll leave this webinar equipped with practical strategies for change order management that protects your margins, strengthens your client relationships, and safeguards your business reputation.