Almost every project of any size changes once it starts. A change order is the written record of that change: what is different, what it costs, and how it affects the schedule. Handled well, it is unremarkable paperwork. Handled poorly, it is the reason a final invoice arrives well above the estimate.
Why Projects Change
Changes come from two directions, and they are worth separating because they are treated differently.
Discovered conditions are things nobody could see when the estimate was written. Rot behind siding, an undersized electrical panel, subfloor damage under old flooring, or ductwork that turns out to be in worse shape than expected. These are not anyone's fault, and on older homes they are common enough to plan for.
Homeowner changes are decisions you make after the scope was set. Upgrading a material, moving a fixture, adding a room to the job. These are entirely reasonable, but they are also entirely optional, which affects how you might want to weigh them.
What a Change Order Should Contain
Whatever prompted it, the document should be specific:
- A description of what is changing and why
- The revised or additional work in scope terms
- The cost, broken into materials and labor where possible
- Any change to the completion date
- Signatures from both parties, dated before the work is done
That last point is the one that matters most. The purpose of a change order is that you agree to the cost in advance. A change discussed verbally on site and priced on the final bill is not a change order, and it is the single most common source of billing disputes.
Pricing That Is Already Agreed
Some hidden conditions are predictable enough to price before they are found. Roofers often quote a per sheet rate for replacing damaged decking. Flooring contractors may quote a per square foot rate for subfloor repair. Getting these unit rates into the original agreement means that when the problem appears, only the quantity is in question, not the price.
This is worth asking about during the estimate, since it is much easier to negotiate a rate before a crew is standing in your house waiting for an answer. A clear original scope of work is where these belong.
Keeping Change Orders Under Control
A few habits help:
- Set a contingency. Setting aside a portion of your budget for the unexpected means a discovered condition is an inconvenience rather than a crisis. This is discussed further in budgeting for the parts of a project you cannot see.
- Make decisions early. Most homeowner driven changes come from choices deferred until the crew needs an answer. Selecting materials before work starts removes a lot of them.
- Ask about the schedule, not just the cost. A modest change can add days if it means reordering material, and the delay may matter more than the dollars.
- Get it in writing every time, including the small ones. Several unrecorded verbal changes are harder to reconstruct later than one large documented one.
If You Disagree With a Change Order
You are allowed to question one. Ask what specifically was found, ask to see it if it is still visible, and ask why it falls outside the original scope. A reasonable contractor will walk you through it. If the answer is that the original estimate simply missed something, that is a conversation about who absorbs the difference, and it is a fair one to have.
Comparing multiple estimates before you hire gives you a better sense of which scopes were realistic in the first place. Tell us about your project and we will connect you with contractors who serve your area, free and with no obligation to hire.