Change orders get blamed for blown budgets, but the order itself is not the problem. The problem is the change that happens verbally, on a Friday, with no price attached until the invoice arrives.
We followed several renovations through their variations and found a simple pattern: projects that priced changes before work started stayed close to budget, and projects that "sorted it out later" did not.
What counts as a change
A change order is any alteration to the agreed scope, price or schedule. Moving a socket, upgrading a tile, adding a window, or delaying a phase all qualify. Even a decision to keep something the same, after it has been removed, is a change if it costs labour to reverse.
Small requests feel informal, which is exactly why they escape documentation. Each one is cheap; twenty of them are not. The written order is what turns a vague favour into an agreed number.
Price it before the work
The rule that saves the most money is simple: no work without a price. Ask for a written variation showing the extra labour, materials and any extension of time. Sign it, or decline it, before the trade proceeds.
Contractors sometimes resist this because pricing small items takes time. Hold the line politely. A professional will provide a number, and the ones who refuse are usually the ones whose invoices you would rather not receive.
Hidden conditions are not free
Rot behind a shower, outdated wiring or a wall that is not where the plan said it was will trigger a change. This is normal in older homes, and a fair contract should describe how such discoveries are priced. The worst outcome is a contractor who stops work and negotiates from a position of maximum inconvenience.
Keep a contingency of ten to twenty percent for this reason. It is not pessimism; it is the price of opening a building you cannot fully see. Our guide to reading a quote explains how to spot which conditions are already excluded.
The paperwork that protects you
A proper change order names the work, the price, the effect on the schedule and the date. It is signed by both sides. A text message saying "yes, go ahead" is better than nothing but weaker than a signed sheet, especially if the price was never stated.
Keep a single folder, digital or paper, with the original contract, every change order and every invoice. At the end of the job it becomes the record of what was agreed, and it is what a dispute resolution process will ask for first.
A change order is not bureaucracy. It is the moment a vague request becomes a number you can accept or refuse.
Managing the human side
Most changes come from excitement, not fraud. You see the room open up and want to move a door. That is fine, but decide early. Changes made after finishes are ordered cost far more than the same change made in week one.
Set a weekly review with the site lead. Ask what is coming up, what has been discovered and what decisions are needed. Ten minutes a week prevents the Friday afternoon surprise and keeps the crew working instead of waiting.
When to say no
Say no when the change pushes you past your contingency, when it is cosmetic and can wait, or when the price is unexplained. Ask for a breakdown and compare it with the original quote rates. A fair contractor will justify the number; an unfair one will apply pressure.
Also say no to retroactive approvals. If work was done without an agreed price, you are entitled to ask for evidence before paying. That conversation is much easier when your original contract required written approval. Our concrete crack guide is a useful reference when a discovered defect is used to justify a large variation.
Key facts
- Any change to scope, price or schedule needs a written order.
- Agree the price before the work, every time.
- Hidden conditions are normal; keep a ten to twenty percent contingency.
- Record the schedule impact, not just the cost.
- Review upcoming decisions weekly to avoid late changes.
The bottom line
Changes are part of building. Surprises are optional. Price each one in writing before it happens, keep a contingency, and review the plan weekly. Do that and a renovation can bend without breaking your budget.
