What is a change order

Short answer

A change order is a formal, written agreement that changes part of a construction job after the original contract is signed. It can add work, remove work, swap materials, adjust the schedule, or change the price. In plain English, it is the paper trail for "we are doing this differently now."

Change orders are common on new builds, home additions, structural work, and major renovations. Even well-planned jobs can run into hidden damage, code issues, product delays, design revisions, or homeowner requests that were not included at the start. A written change order helps avoid confusion and gives both sides a chance to review the impact before more work happens.

What a change order means for you

For a homeowner, a change order usually means one of three things: your final cost may go up or down, your schedule may shift, or the finished result may be different from the original plan. Sometimes all three happen at once. That is why change orders matter so much. They directly affect what you get, what you pay, and when the work may be done.

Not every change order is a bad sign. Some are practical and reasonable. For example, you may decide to upgrade windows, move a wall opening, add built-in storage, or switch to a better flooring product. Other change orders happen because the contractor uncovers something no one could see before demolition, like water damage, unsafe wiring, foundation movement, or framing that does not meet current code.

The key point is this: a change order is not just a note. It is a contract change. If you sign it, you are usually agreeing to the new work, the new price, and any time adjustment listed there. That is why you should read it slowly, ask questions, and make sure the language is specific.

• It should clearly describe what is changing.
• It should say how much the change adds or subtracts.
• It should say whether the timeline changes.
• It should list any material, finish, or product substitutions.
• It should be signed or approved in writing by both sides.

How change orders work in practice

In a well-run project, the process is straightforward. A need for change comes up. The contractor explains the issue or the new request. Then the contractor prepares a written change order that shows the revised scope, cost, and any schedule effect. You review it, ask questions, and decide whether to approve it before that extra work begins.

Here is a common example. You are renovating a kitchen and the contract calls for standard cabinets. After seeing samples in person, you decide you want taller cabinets and a different wood finish. That change may increase cabinet cost, labor time, trim details, and lead time. A proper change order should spell out each part of that change so there is less room for dispute later.

Here is another example. During a bathroom remodel, the contractor opens a wall and finds old plumbing that is leaking and not safe to reuse. If the original contract did not include replacing that plumbing, the contractor may present a change order for the extra repair work. That can be frustrating, but hidden conditions are one of the most common reasons prices rise on renovation jobs.

Some contractors use a standard change order form. Others use software or email approval systems. The format matters less than the content. The details should be complete, and you should be able to keep a copy for your records.

• Date of the change
• Project address
• Reference to the original contract
• Detailed description of added, removed, or revised work
• Price increase or decrease
• Payment terms for the change
• Schedule impact, if any
• Signatures or written approval

Why change orders happen so often

Construction is not like buying a finished product off a shelf. Every house is different, and many problems stay hidden until walls, floors, or ceilings are opened up. Plans can also evolve as homeowners see the space taking shape. That is why change orders are normal, especially on older homes and complex projects.

Some of the most common reasons include hidden structural issues, code corrections, permit requirements, owner-requested upgrades, product availability problems, engineering revisions, and weather-related jobsite changes. New construction can have change orders too, especially when design details are not fully settled before work begins.

Still, frequent or vague change orders can also be a warning sign. If a contractor keeps introducing extra charges for items that reasonably should have been in the original scope, that may point to poor planning, weak estimating, or unclear communication. This is one reason it is so important to choose a licensed, bonded, and insured general contractor with experience in your type of project and to verify credentials before signing any contract.

What change orders can cost

There is no single national price for a change order because the cost depends on what is changing. Some are small paperwork-level adjustments. Others involve major redesign, structural work, or long material delays. The figures below are broad national estimates, not quotes or guarantees.

Those ranges are only rough examples. A simple tile upgrade may add a few hundred dollars, while moving plumbing, changing window sizes, revising framing, or correcting structural issues can cost much more. In many cases, the bigger expense is not the paperwork itself. It is the labor, demolition, design revision, permit update, or schedule disruption tied to the change.

If you are comparing contractors, ask how they handle change order pricing. Some charge fixed amounts for certain upgrades. Others use time-and-materials pricing. Neither approach is automatically wrong, but you should understand how costs are calculated before a change happens.

What to watch for before you approve one

The biggest risk with change orders is not the fact that they exist. The risk is approving one that is unclear, rushed, or incomplete. If the description is vague, you may think you are getting one thing while the contractor thinks something else. That can lead to stress, delays, and disputes about payment or quality.

Watch for broad phrases like "miscellaneous work" or "upgrade as discussed" with no detail. Watch for missing line items, no timeline impact, or pressure to sign immediately without explanation. You should also be careful if the contractor says written approval is not necessary. It is usually in your best interest to keep everything in writing.

• Ask what exactly is included and excluded.
• Ask whether permits, inspections, or engineering updates are affected.
• Ask whether this change creates other follow-on costs.
• Ask how many days, if any, the schedule may shift.
• Ask whether allowances or selections elsewhere in the contract need updating.
• Keep copies of every signed change order, email approval, and revised drawing.

If English is not your first language, it is okay to slow the process down. Ask for plain-language explanations. Ask the contractor to point to the exact place in the contract or plans that is changing. You do not need to share immigration status or sensitive personal information to ask for clear communication. A trustworthy licensed contractor should be able to explain the change in terms you understand.

How to reduce change orders on your project

You probably cannot avoid change orders completely, but you can reduce them. The best way is to make as many decisions as possible before work begins. Finalize layouts, materials, fixture selections, appliance sizes, and finish levels early. The more unanswered questions in the contract, the more likely change orders become later.

It also helps to have a detailed written scope of work, realistic allowances, clear plans, and a contractor who has experience with similar jobs. On additions, structural projects, and older homes, ask upfront how hidden conditions are handled. That does not remove the risk, but it gives you a better sense of how surprises may be documented and priced.

• Choose materials and finishes before demolition when possible.
• Review plans carefully and ask questions early.
• Make sure the contract lists specific products, quantities, and responsibilities.
• Set aside a contingency budget for surprises, especially on renovations.
• Work with a licensed, bonded, and insured contractor and verify credentials before signing.

Get matched with contractors who explain things clearly

A good contractor does not hide behind paperwork. They explain why a change is needed, what it affects, and what your options are. That kind of communication matters just as much as price, especially on major renovations, additions, structural work, and new home construction.

Mainstay Builders is a free matching service. We connect U.S. homeowners with licensed, bonded, and insured general contractors for major residential projects. We do not perform construction work, and we are not a licensed building professional. Our role is to help you get matched with contractors you can review, interview, and choose from yourself.

If you want to compare contractors for a build or renovation, we can help you start with pros who fit your project type. From there, always verify licenses, insurance, and bond status, review the contract terms carefully, and make sure you understand how change orders will be handled before you sign.