Change Order: What It Costs You (and How to Fight Back)
What a change order is in renovation, typical markups (15-20%), the 3 types, how to negotiate them, and when to refuse. Real numbers and contract tips.
Example: a kitchen remodel is signed at $50,000. Mid-project the homeowner upgrades the backsplash and adds under-cabinet lighting, and demolition exposes old wiring that has to be replaced. Each of those becomes a change order, each priced as new work plus the contractor's markup. If together they add $6,000, the job finishes 12% over contract — just within the 10%–15% contingency This Old House recommends setting aside (Source: This Old House, "How Much Does Home Renovation Cost?", updated 03/31/2026). Without that reserve, the same three changes become a budget crisis. That pattern is the main reason renovation budgets blow up.
What a Change Order Actually Is
A change order is a formal written amendment to your construction contract that modifies the scope, price, or timeline. Both you and your contractor sign it before the changed work begins.
The short answer: it's a mini-contract within your contract. It's legally binding, documents cost impact with an itemized breakdown, adjusts the completion date, and protects both sides from he-said-she-said disputes that can cost more in legal fees than the work itself.
Key point: A change order is a negotiation, not a surprise bill. You can push back on pricing, request alternatives, or refuse it entirely. Most homeowners don't know this.
The Three Types
| Type | Cause | Who Pays | Avoidable? |
|---|---|---|---|
| Owner-initiated | You change your mind (upgrades, design tweaks) | You — full cost + markup | Yes — finalize decisions before signing |
| Unforeseen conditions | Hidden problems (mold, bad wiring, structural issues) | You — but negotiate markup | Partially — pre-construction inspection helps |
| Errors/omissions | Architect or designer missed something | Depends on contract | Yes — hire experienced designers with E&O insurance |
Owner-initiated changes are the one category entirely in your control. Eliminate them by making every material and design decision before the contract is signed. No "TBD" line items. Ever.
Unforeseen conditions are the expensive wildcards. A pre-construction inspection — where a specialist opens select walls and checks behind surfaces — catches many of these surprises before you commit to a price. No inspection finds everything, which is why the contingency still matters.
What Change Orders Cost
| Component | Typical Range | Example: Moving a Kitchen Outlet |
|---|---|---|
| Materials | Varies | $45 (wire, box, cover plate) |
| Labor | $65–$150/hr | $195 (electrician, 1.5 hrs) |
| Contractor markup | 15–20% | $48 |
| Total | — | $288–$500+ |
Here's the thing: change order work costs more per unit than original contract work. Crews already set their schedule. Materials were ordered. Changing course means re-scheduling trades, re-ordering, and often undoing completed work. Check what markup your contract allows on changes; if it isn't written down, negotiate it before signing.
When Change Order Protections Break Down
Three scenarios where the standard advice fails:
"Allowance" items are change orders in disguise. Your contract says "Tile allowance: $2,000" but you pick $3,400 tile. That $1,400 difference gets processed as a change order — with markup. Some contractors deliberately low-ball allowances to win bids.
Verbal approvals become written change orders after the fact. You told the electrician "yeah, add that outlet." Two weeks later, a $475 change order arrives. In most states, verbal authorization is binding. Never approve anything on-site verbally.
"Unforeseen" conditions that were actually foreseeable. A contractor who doesn't open a single wall during the estimate phase, then hits you with $12,000 in surprises, isn't unlucky — they're gaming the bid. Experienced contractors know what's behind walls in 1960s ranch homes.
For contract negotiation strategies, see our guide to hiring a renovation contractor.
How to Minimize Change Orders
Every decision made before signing is one that can't be repriced as a change order later.
- Pre-construction inspection — hire a specialist (not your contractor) to check wall conditions, electrical panels, plumbing, and asbestos in pre-1980 homes
- Complete material selections before signing — every tile, fixture, paint color, and hardware pull. No allowances where specifics could be chosen instead
- Detailed scope of work — not "remodel kitchen" but "demolish 14 LF upper cabinets, install specific model, quartz countertops (42 sq ft) with undermount sink cutout"
- Contingency fund: 10–15% — This Old House's recommendation; a $75,000 project needs $7,500–$11,250 set aside for genuine surprises, more for older homes with unknown conditions
Use our home renovation planning guide to build a complete scope before getting bids. For overall budget estimates, try our whole-house remodel cost calculator — it includes a contingency line for change orders.
Worried about your renovation budget getting derailed by change orders? Use our whole-house remodel cost calculator with the built-in contingency line — then read our home renovation permits guide to understand which changes trigger permit amendments and additional fees.
Related Questions
What is a change order in home renovation?
A change order is a formal written amendment to your original construction contract. It modifies the scope of work, cost, timeline, or all three. Both the homeowner and contractor must sign it before the changed work begins. Without a signed change order, you have no legal documentation of what was agreed — which is exactly how disputes over 'extra' charges start.
How much does a change order typically cost?
The change itself has a price (materials + labor for the new work), plus a contractor markup of 15-20% on top of that. A seemingly small change — moving a kitchen outlet 3 feet — can run $350-$800 after markup, permits, and drywall patching. How many change orders a project gets depends mostly on how complete the plans and selections were before signing — which is why a contingency reserve exists.
Can I refuse a change order from my contractor?
If the contractor is requesting additional money for unforeseen conditions (hidden mold, outdated wiring), you can negotiate but not easily refuse — the work needs doing. If the contractor is trying to charge extra for work that was clearly in the original scope, you absolutely can and should refuse. Review your contract line by line before signing anything.
What are the three types of change orders?
Owner-initiated changes (you decide to upgrade countertops mid-project), unforeseen site conditions (opening a wall reveals knob-and-tube wiring or asbestos), and errors or omissions in the original plans (the architect forgot to spec a structural beam). Owner-initiated changes are the most common and most avoidable. Unforeseen conditions are the most expensive.
How do I negotiate a change order?
Get the change order in writing with an itemized breakdown — materials, labor hours, markup percentage. Compare material costs against Home Depot or supplier pricing. Ask if the markup covers overhead that's already accounted for in the original contract. Request competitive pricing if the change is large ($5,000+). Contractors often have room to move on a change order when you push back with specifics.
Is a 20% change order markup reasonable?
There is no industry-wide standard. Many contractors apply the same overhead-and-profit markup to change orders that they use in the base contract, and a contract that states that percentage up front is the best protection. If a change order carries a noticeably higher markup than the rest of the contract, ask for justification. The markup covers re-scheduling crews, re-ordering materials, possible permit amendments, and the contractor's profit. On time-and-materials change orders, watch the labor rate too — some contractors bump hourly rates 20-30% above their base contract rate.
How can I prevent change orders during renovation?
Three strategies cut the number of change orders: (1) Invest in thorough pre-construction inspection — $300-$500 for a specialist to open walls and check conditions before work begins. (2) Finalize every material selection before signing the contract — not 'to be determined later.' (3) Include a detailed scope of work with measurements, material specs, and finish schedules. Money spent on complete plans up front is usually far cheaper than the same decisions made mid-construction at change-order prices.
What happens if I don't sign a change order?
If you don't sign and the contractor does the work anyway, you're in a gray area. Some states allow contractors to claim 'quantum meruit' (payment for value received) even without a signed change order. Other states side with the homeowner. Either way, it's a lawsuit waiting to happen. Best practice: nothing changes without a signed change order. Put that clause in your original contract.