Every luxury custom home has change orders. Anyone who tells you their project will not is either not looking closely or not being honest. On a two-year build in Scottsdale or Paradise Valley, a family will make dozens of decisions after contract signing that adjust scope, cost, or schedule. The question is not whether change orders happen. The question is how the builder handles them, and whether the homeowner sees the full picture before the work goes in the ground.
What Actually Counts as a Change Order
A change order is any adjustment to the signed contract's scope, price, or schedule after construction starts. It is a formal document, not a hallway conversation. If a decision changes what the builder is building, what the homeowner is paying, or when the project finishes, it belongs on paper.
- Homeowner-driven design changes: moving a wall, upsizing a window, adding a wine room
- Selection upgrades that exceed an allowance line
- Field conditions: soil, rock, or existing utilities that were not visible at bid
- Jurisdictional changes: a plan review comment or inspector requirement that adds scope
- Vendor substitutions: a discontinued fixture or a delayed appliance package
Anything that adjusts the contract needs a change order. A verbal yes in the field is how projects end up in disputes six months later.
The Two Main Sources of Change Orders
On the luxury custom homes we build, change orders come from two directions and it helps to separate them mentally. Owner-directed changes are decisions the family makes after signing. Conditions-driven changes are things nobody could have priced at contract because they were not visible or not yet defined.
Owner-directed changes are the larger category by dollar value on almost every project. That is not a criticism. It is what happens when a family lives with a design for months and decides they want the primary suite three feet larger or the great room ceiling detailed differently. The build is theirs, and refining it during construction is part of the process.
How a Change Order Should Be Priced
A clean change order shows the homeowner exactly what they are paying for and why. Vague lump sums are where trust breaks down. On our custom home projects, every change order is broken out the same way.
- Scope description in plain language, with drawings or specs referenced
- Material cost from the actual supplier quote
- Labor hours with the trade partner and rate
- Any subcontractor markup, shown as a line, not buried
- Schedule impact in calendar days, even if the answer is zero
- General contractor fee, calculated the same way it was on the base contract
When every change order follows the same format, the homeowner can compare one against another and see whether the numbers make sense. That is the whole point.
Timing Matters More Than People Realize
A change decided during framing costs one number. The same change decided after drywall costs three or four times as much, because now the builder is tearing out finished work, replacing materials that were already installed, and rescheduling trades who have moved on to other projects.
The cheapest change order is the one made before construction starts. The second cheapest is the one made while the affected trade is still on site. The most expensive is the one made after the trade has demobilized and the space has been closed up. We tell homeowners this at contract signing, not after a $30,000 rework.
Why Design-Build Reduces Change Order Volume
Projects run under a design-build model generally see fewer change orders than projects handed off from a separate architect to a builder mid-stream. The reason is simple: the builder was in the room when the drawings were developed, so constructability issues were resolved on the drawing board instead of discovered in the field.
That does not mean design-build eliminates changes. Families still change their minds and site conditions still surprise everyone. But the category of change order that starts with 'this cannot actually be built the way it is drawn' largely goes away when the same team owns design and construction.
The Change Orders That Come from the Site
On hillside sites in Scottsdale or in the foothills around Carefree and Cave Creek, site-driven change orders are more common. Rock is a big one. Utilities running through a lot in a location the survey did not catch is another. Existing structures being removed for a rebuild almost always produce a surprise.
- Rock excavation above what the geotech report predicted
- Existing septic, wells, or utility runs discovered during grading
- Retaining wall scope adjustments once cuts are open and engineering revisits the design
- Drainage rework after the pad is set and water flow can be observed
These are not failures of estimating. They are things that cannot be fully known until the ground is open. The right response is a documented change order priced at real cost, not an argument about who should have caught it earlier.
How the Homeowner Approves a Change
Every change order should be issued in writing, signed by the homeowner before the work starts, and logged against the contract sum and schedule. On our projects, the homeowner sees a running total of approved changes at every draw so there are no surprises at the end.
If a builder is doing work in the field and telling the homeowner they will 'sort out the paperwork later,' that is the warning sign. The paperwork is the protection, for both sides. It is not optional.
A Realistic Change Order Budget
Families ask us what to expect. On a well-planned luxury custom home in Scottsdale or Paradise Valley, we tell homeowners to plan for change orders in the range of 5 to 10 percent of the base contract, with the higher end more common on complex sites or projects where the interior designer is still developing selections during construction.
Projects that come in under 5 percent usually had a very disciplined pre-construction phase and few owner-directed changes. Projects that exceed 10 percent are almost always driven by design evolution, not builder mistakes. Knowing the range up front lets the family budget honestly instead of treating every change as a crisis.
What This Means for Your Project
Change orders are a normal part of building a custom home. The goal is not zero changes. The goal is a documented, transparent process where every change is priced fairly, timed intentionally, and approved in writing before work starts. That is how a two-year project ends with the family and the builder still on good terms.
If you want to see how this discipline shows up in finished work, our portfolio walks through projects that ran this way. If you are mid-project and want a second opinion on a change order sitting on your desk, reach out through our contact page.
Frequently Asked Questions
- What is the difference between an allowance overage and a change order?
- An allowance overage is a homeowner spending above a placeholder line already in the contract, reconciled at the end. A change order adjusts the contract itself, adding or removing scope. Both are documented, but they are tracked separately.
- How much should I budget for change orders on a luxury custom home?
- Plan for 5 to 10 percent of the base contract on a well-run project. Complex sites and evolving interior design tend to push toward the higher end. Set that number aside at the start so a change is a decision, not a scramble.
- Can I refuse a change order the builder proposes?
- Yes. Owner-directed changes require your signature before work starts. Conditions-driven changes, like rock excavation or a code requirement, may be unavoidable, but the price and scope are still open to review. Ask for the backup and negotiate the terms.
- How fast should a change order be turned around?
- Simple changes should be priced within a week. Complex changes that require subcontractor quotes or engineering may take two to three. If a builder cannot turn a change order in that window, they are not managing the process well.
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