Renovation Change Orders and How to Avoid Them

Nobody signs a renovation contract expecting to sign a second one three weeks later. Yet ask around, and almost everyone who's renovated has a story about a number that grew mid-project — an extra invoice, a "while we're in there" charge, a total that stopped matching the one they agreed to.

That's a change order, and the word alone has earned a bad reputation it doesn't fully deserve. Some are unavoidable. Some are the direct result of a scope that was never nailed down in the first place. The trick isn't avoiding every change order — it's knowing the difference, and making sure the ones that do happen are priced and approved before the work starts, not after.

Here's what actually causes them, what a legitimate one looks like on paper, and how the right contract structure keeps the avoidable ones from ever reaching your inbox.

What Is a Change Order, Exactly?

A change order is a written amendment to your renovation contract — it documents a change to the scope, price, or schedule that both you and your contractor agree to, in writing, before the new work begins.

It's not a red flag by itself. A change order is simply the paperwork for "something changed." What matters is whether that paperwork exists at all, whether it was priced before the work happened rather than after, and whether you actually signed off on it.

Key Insight: A change order isn't the opposite of a fixed-price contract — it's what protects one. The original scope stays locked at the original price. Only new or altered work gets its own separate price tag, agreed to in advance.

Why Change Orders Happen — and Which Ones You Can Prevent

Most change orders fall into one of four categories. Two of them are largely outside anyone's control. Two of them are almost entirely preventable.

You changed your mind

This is the most common one, and there's nothing wrong with it — you saw a nicer tile, decided the island needed to be bigger, or wanted a window where there wasn't one in the original plan. It's a legitimate change order. It's just also the one most within your control: the earlier a decision like this happens, the cheaper it is to make.

The walls revealed something nobody could see beforehand

Vancouver's older housing stock hides real surprises — knob-and-tube wiring, undersized or corroded plumbing, rot behind a tub surround that looked fine from outside. A contractor who's worked in older homes before expects some of this and prices contingency for it. But genuine unknowns still generate real change orders, and that's not a failure of the process — it's the process working correctly, provided it's documented and priced before anyone proceeds.

The inspector (or the code) added something

Sometimes a permit inspection reveals that an electrical panel no longer supports the added load, or that a basement bedroom needs different egress, or that ventilation has to be upgraded to meet current code. This isn't your contractor padding the invoice — it's the same code-triggered items we cover in our guide to hidden renovation costs, and it becomes a change order specifically because it wasn't knowable until the wall was open or the inspector was on site.

The scope was never actually locked

This is the one that shouldn't happen, and it's almost always preventable. If your original quote said "kitchen renovation" instead of naming the cabinet line, the countertop material, and the exact fixture package, you didn't get a scope — you got a placeholder. Every gap in that placeholder becomes a decision made mid-project, and mid-project decisions get billed as change orders whether or not they feel like "changes" to you. We go deeper on how a loosely defined scope turns into budget creep in renovation mistakes that blow your budget.

Legitimate Change Order or Red Flag? A Quick Comparison

Not every change order is handled the same way, and the difference is usually obvious once you know what to look for.

Signal	Legitimate change order	Red flag
Timing	Priced and approved before the new work starts	Mentioned after the work is already done
Documentation	Written, with a specific price and schedule impact	Verbal — "don't worry, we'll sort it out later"
Your role	You sign off before anything proceeds	You find out when the invoice arrives
Reason	A genuine unknown, a code requirement, or your own decision	A vague allowance that was underpriced to win the bid
Pattern	An occasional, isolated event	Constant, on nearly every line of the project

If a contractor's change orders consistently land on the wrong side of that table, the issue usually isn't bad luck on that particular project — it's a quoting process built to look lower than it actually is, with the real cost of the job recovered later through a steady drip of "extras."

What a Properly Handled Change Order Actually Looks Like

A well-run change order isn't complicated. It follows the same four steps every time, regardless of what triggered it:

• Written notice first. The issue or the requested change gets documented before any extra work begins — never assumed, never verbal.
• A price and a schedule impact, given upfront. You should know both numbers before you decide, not after the work is already installed.
• Your signature before anyone proceeds. No sign-off, no work. This is the single clause that protects you the most, and it's one we cover in full in our renovation contract checklist.
• A running log attached to the contract. Every approved change lives in one place, so nothing gets lost in a string of texts or forgotten by the time you get your final invoice.

One detail people don't expect: if the change affects something your building permit already covers — moving a wall, relocating plumbing, adding an electrical circuit — it may require a permit amendment filed with the City before that portion of the work can legally proceed. That's an extra step, and a small fee, but skipping it isn't a shortcut worth taking.

What Change Orders Actually Cost

Industry data on renovation and construction projects generally puts change order costs at somewhere around 8–14% of total contract value across a typical project, and contractors commonly apply a 15–25% markup on the added labour and materials to cover the overhead of stopping, reordering, and remobilizing a crew mid-project.

That markup isn't arbitrary. A decision made on paper during design costs exactly what the material and labour cost. The same decision made after demolition often means removing finished work before the new work can go in — a tile that's already set, a wall that's already closed up, a fixture that's already plumbed in — which is why identical choices get more expensive the later they happen, both in dollars and in days added to your schedule.

On a mid-range kitchen or bathroom renovation, that gap is real money. A cabinet upgrade decided during design might cost only the price difference between the two options. The same upgrade decided after cabinets are already installed can mean paying to remove and dispose of the first set on top of the new one — often turning a few-hundred-dollar decision into a few-thousand-dollar one.

How to Keep Change Orders to a Minimum

You can't eliminate change orders entirely — some genuine unknowns are simply part of renovating an existing home. But you can prevent most of the avoidable ones:

• Lock your scope before you sign, down to the cabinet line, the tile, and the fixture models — not a placeholder allowance.
• Ask what's excluded, in writing, not just what's included. Gaps in the exclusion list are where the surprises live.
• Make your decisions during design, not during demolition. Every choice made on paper is cheaper than the same choice made mid-build.
• Choose a fixed-price contract with a clear change order clause, so you know exactly how any future change gets priced and approved.
• Set aside a genuine contingency for the unknowns that even a great contractor can't fully predict — we walk through how much to budget in our guide to renovation contingency planning.

People Also Ask

Can a contractor charge me for a change order I never approved? No — not under a properly written fixed-price contract. The change order clause should require your written sign-off before any extra work begins or gets billed. If an invoice shows up for work you never approved, that's a contract problem, not a normal part of renovating.

Do change orders mean my renovation is going over budget? Not necessarily. A change order for something you chose to upgrade, or a genuine unforeseen condition, is a normal part of an honest process — as long as it's priced and approved before it happens. What actually blows a budget is a scope that was never locked to begin with, generating a steady stream of "changes" that were really just gaps in the original quote.

How many change orders is "normal" on a renovation? There's no fixed number, but a well-scoped project should generate few, if any, beyond genuine unknowns behind walls. If a project is producing a new change order every week, the original scope was almost certainly too thin to begin with — worth raising directly with your contractor rather than treating as business as usual.

Key Takeaways

• A change order is simply the paperwork for a scope, price, or schedule change — normal when it's written, priced, and approved in advance.
• Change orders come from four sources: your own decisions, hidden site conditions, code-triggered requirements, and scope that was never fully locked — only the last one is fully avoidable.
• A legitimate change order is priced and signed off before the work happens; a red flag shows up as a surprise invoice after the fact.
• Industry data puts typical change order costs around 8–14% of contract value, with a 15–25% markup on the added work.
• Locking your full scope before you sign, and working with a genuinely fixed-price contract, is the single biggest thing you control.

FAQ

What is a change order in a home renovation? A change order is a written amendment to your renovation contract that documents a change in scope, price, or timeline — agreed to and signed by both you and your contractor before the new work begins.

Are change orders normal, or a sign something went wrong? Some are entirely normal, especially in older homes where site conditions can't be fully known until a wall opens. What signals a problem is a change order that shows up after work is already done, or a pattern of them tracing back to a vague original scope.

How much do change orders typically add to a renovation budget? Industry figures generally put change orders around 8–14% of total project cost, though a tightly scoped, fixed-price contract can keep that closer to zero for anything within your control.

Can I refuse a change order? Yes. You're only obligated to pay for a change order you've reviewed and signed. If you decline, the work proceeds under the original scope, or you and your contractor discuss alternatives that fit your budget.

Does a fixed-price contract eliminate change orders? It eliminates the unnecessary ones — the surprises caused by an underpriced or vague scope. It doesn't eliminate the legitimate ones, like a homeowner's own mid-project decision or a genuine unforeseen condition, but it does guarantee those are priced and approved before they cost you anything.

---

Change orders aren't the enemy — an undefined scope is. The whole point of building a full, fixed-price plan before anything is ordered is so that if a change order does happen, it's a short, honest conversation instead of a surprise on your invoice. If you'd like to see how tightly a scope can be locked down before you ever sign, reach out for a fixed-price estimate and we'll walk through your project line by line.