⚠️ Change Orders: How Contractors Add Costs After You Sign

You got a quote, you signed the contract, you agreed on a price. Then the project starts and suddenly there are add-ons, extra charges, and a final bill that is 40% higher than what you signed. Change orders are legitimate when used correctly and a scam when they are not. Here is how to tell the difference.

What a Legitimate Change Order Is

A change order is a formal written amendment to the original contract that documents a change in scope, cost, or timeline. Legitimate reasons for change orders include:

• You asked for something different than what was originally specified
• Hidden conditions were discovered that could not be reasonably anticipated (rotted framing behind walls, incorrect wiring that must be corrected to meet code)
• Material unavailability requiring an upgrade or substitution
• Code compliance requirements discovered during inspection

A legitimate change order has a written description of the change, a specific dollar amount, and requires your signature before the contractor proceeds.

How Change Order Abuse Works

Some contractors deliberately underbid jobs to win the contract, then make up the difference through change orders once they are in your house and you are committed. Common patterns:

• The low-ball opener: Quote comes in 30% below competitors. Seems like a great deal. Change orders during the job push the final price above the next-lowest competitor.
• The vague scope: The original contract is written to minimize what is included, creating room for nearly anything to be called "additional work."
• The verbal approval: Contractor does work and asks for approval afterward, putting you in the awkward position of having to pay for completed work you did not formally approve in advance.
• The discovery game: Every wall they open reveals another problem. Some of these are real, but experienced contractors in your area know what is behind walls in homes of your age and type, and should have built contingency into their estimate.

How to Write a Contract That Limits Surprise Costs

The best time to protect yourself is before you sign, not after problems arise. Key contract provisions:

• Define scope in detail: The more specific your scope description, the less room for "that wasn't included."
• Require written change orders before work proceeds: Any change to scope or cost must be in writing and signed by both parties before the contractor does the additional work.
• Include a change order cost cap or notice threshold: Changes under $200 may not need formal sign-off, but changes over $500 always should.
• Include a contingency clause: Specify what happens if hidden conditions are discovered. Reputable contractors often build 5-10% contingency into their estimate rather than leaving it as a potential change order.
• Define "completion" clearly: What does the finished job look like? Including a punch list process protects you if the contractor declares themselves done before you agree.

When You Discover the Change Order Mid-Project

If a contractor tells you about additional needed work verbally during the project, do not say yes or no on the spot. Ask them to put it in writing with a specific cost. Then ask: "Is this work necessary to complete the original project, or is it additional work I can choose not to do?" If they say it is necessary, ask why it was not identified during their original walkthrough. If they cannot explain that, you have grounds to negotiate or dispute the charge.

Never Pay for Undocumented Changes

If a contractor presents a final bill with items that do not appear in a signed change order, you are not obligated to pay for them. Challenge any line item that was not documented in writing before the work was done. If they threaten a lien, contact your state's contractor licensing board and potentially an attorney. Mechanics lien laws are complex and vary by state, but undocumented work creates legitimate disputes in most jurisdictions.

The 10% Rule

As a rough guideline, change orders totaling more than 10% of the original contract price on a project with clearly defined scope are worth scrutinizing. Renovation projects with older homes and more unknowns may legitimately run 15-20% over. If you are hitting 40-50% over the original quote through change orders, something went wrong either in the original estimate or in how the change orders are being managed.

Get the original quote right from the start. QuoteScore helps you evaluate your initial quote so you know whether you are starting from a fair number before any change orders are added.