The short answer: a change order is a written modification to the construction agreement after the original scope has been established. It should identify what is changing, the price impact, the schedule impact, and the parties’ approval before the changed work proceeds. On a luxury custom home, some change orders are legitimate and unavoidable. Many expensive ones, however, can be reduced through better design coordination, realistic allowances, earlier selections, and clearer scope before construction begins.
The Arizona Registrar of Contractors specifically advises homeowners to understand the change-order process before signing a contract, including how a change affects total project cost and completion time, and states that the change order should be signed by both parties. That is good advice on any construction project and especially important on a highly customized home.
At Bella Legacy, we think the goal is not to promise “zero change orders.” The goal is to make sure changes are understood, documented, and intentional – and to eliminate as many avoidable ones as possible before they reach the field.
What Is a Change Order?
A change order modifies the construction contract after the original agreement is executed. It may add work, remove work, change a material, revise a design detail, address an unforeseen condition, or respond to a regulatory or engineering requirement.
A strong change order should answer four questions:
- What exactly is changing?
- Why is it changing?
- How does it affect the price?
- How does it affect the schedule?
If those answers are not clear, the owner is being asked to approve something they cannot properly evaluate.
Not Every Change Order Means Something Went Wrong
Custom homes are not production houses. Owners are making hundreds of design and lifestyle decisions, and the building itself can reveal information that was not visible on paper.
Some changes are simply the natural result of customization. The problem is not that a change occurs. The problem is when the project has no disciplined system for pricing, approving, documenting, and sequencing it.
The Six Most Common Sources of Change Orders
1. Owner-requested design changes
The owner sees the framed home and decides a window should be larger. A fireplace changes. A cabinet wall is redesigned. The appliance package grows. The pool layout evolves.
There is nothing inherently wrong with changing your mind. The important question is whether the improvement is worth both the direct cost and the downstream consequences.
2. Incomplete plans or scope
One of the most preventable sources of change orders is construction beginning before the design has enough detail.
If the drawings do not resolve lighting, cabinetry, plumbing, exterior details, structural interfaces, landscape, technology, or other important work, those decisions do not disappear. They simply move into construction, where changes become more expensive.
3. Allowances that do not match the real finish level
If the budget carries $X for a category but the owner is consistently selecting at a materially higher level, the overage becomes visible later.
This is why realistic construction allowances matter. An unrealistically low allowance can make an early budget look attractive without making the final project less expensive.
4. Unforeseen site or existing-condition issues
On a ground-up home, excavation can reveal rock, soils, utilities, or conditions different from what was reasonably expected. On a renovation, demolition can uncover hidden structure, water damage, unpermitted work, electrical issues, or plumbing conditions.
Good preconstruction reduces this risk, but some conditions cannot be confirmed until work begins.
5. Code, permit, HOA, or engineering revisions
A plan reviewer, engineer, community design board, inspector, or utility provider may require a change. The best project teams try to identify these requirements early, but approvals can still create revisions during the process.
6. Product availability or long-lead substitutions
A specified material may be discontinued, delayed, damaged, or unavailable in the needed quantity. A substitution may affect price, detailing, installation, and even related trades.
Early procurement and long-lead tracking help prevent a material problem from becoming both a change order and a schedule delay.
Why a $10,000 Selection Change Can Cost More Than $10,000
The direct material difference is often only part of the cost.
Suppose an appliance changes after cabinetry shop drawings are complete. The appliance itself may cost $10,000 more, but the cabinet dimensions may change, electrical may need revision, ventilation may change, stone may require a different cutout, and fabrication already in progress may need to be modified.
The later a decision changes, the more previously completed work may be affected.
That is why we like to distinguish between the cost of the new item and the cost of changing the project around the new item.
A Change Order Should Show More Than a Lump-Sum Number
The level of detail appropriate to a change depends on its size, but owners should generally understand what the number represents.
- Added or deleted scope
- Trade or material cost
- Labor impact
- Builder fee or markup if applicable
- Credits for work being removed
- Taxes or freight where applicable
- Schedule impact
- Any effect on related selections or trades
The Arizona ROC’s consumer guidance specifically recommends that homeowners understand how change orders increase or decrease project cost, affect completion time, and receive signatures from both parties.
The Best Time to Prevent Change Orders Is During Preconstruction
Once construction begins, the project becomes less flexible every week. Concrete gets poured. Framing closes in. Rough systems are installed. Cabinets are fabricated. Stone is ordered.
Preconstruction is the period when changes are still comparatively inexpensive because they mostly exist on paper.
We would rather spend more time coordinating the architecture, engineering, interiors, site, and budget before groundbreaking than save a month up front and spend the next year resolving avoidable conflicts in the field.
Eight Ways to Reduce Avoidable Change Orders
- Finish the design to the appropriate level before starting. The more unresolved scope enters construction, the more decisions become changes.
- Bring the builder into design early. Constructability and budget feedback are most useful while the architecture can still move.
- Use realistic allowances. A budget placeholder should reflect the owner’s actual expectations.
- Make long-lead selections early. Windows, doors, appliances, cabinetry, plumbing, lighting, and specialty systems can affect multiple trades.
- Coordinate drawings across disciplines. Architecture, structure, mechanical, electrical, plumbing, interiors, landscape, and pool should not operate as separate projects.
- Resolve site issues early. Survey, soils, civil, utilities, grading, drainage, and community requirements should be part of preconstruction.
- Require written change authorization. Avoid “go ahead and we’ll figure it out later.”
- Track schedule impact with cost impact. A change that adds three weeks may matter more than one that adds dollars.
Do Not Let “Value Engineering” Become a Series of Late Change Orders
If a project is materially over budget after drawings are complete, the team may spend months removing scope, redesigning systems, changing finishes, and repricing work.
That can look like value engineering, but it is much more efficient when cost is tested throughout design.
A stronger process is to identify major cost drivers while the architecture is still flexible – large spans, glass systems, complicated roofs, cabinetry, stone, pools, site work, and specialty features – so the design develops around the intended investment rather than being cut back after the fact.
How Change Orders Should Affect the Schedule
Not every change delays the project. Some can be absorbed into existing sequencing. Others sit directly on the critical path.
A late flooring selection may have limited effect if the product is readily available. Changing a custom window package after framing can affect manufacturing, structure, waterproofing, interior finishes, and several inspections.
The change-order discussion should therefore include a real schedule answer: no impact, estimated impact, or impact that cannot yet be known until procurement is confirmed.
Credits Matter Too
Change orders are not always additions. Owners may remove scope, select something below an allowance, or simplify a detail.
The contract should explain how credits are calculated and how builder fees, restocking charges, nonreturnable deposits, or work already performed affect the credit. The same transparency expected for an added cost should apply when scope is reduced.
Frequently Asked Questions
Are change orders normal on a custom home?
Yes. Highly customized projects evolve, and some conditions cannot be known in advance. The objective is to minimize avoidable changes and manage necessary ones with clear documentation.
Should work start before I sign the change order?
As a general project-management practice, changed work should be documented and authorized before it proceeds unless an emergency or other contract-defined situation requires immediate action. Arizona ROC guidance emphasizes a properly executed change-order process and signatures by both parties.
Can a fixed-price contract still have change orders?
Yes. Fixed price applies to the defined original scope. Owner changes, excluded conditions, allowance differences, and other contract-defined changes can still modify the price. See our guide to cost-plus vs. fixed-price custom-home contracts.
What is the biggest way to reduce change orders?
Complete more decisions during preconstruction. Better drawings, realistic allowances, early selections, site due diligence, and coordination among the architect, designer, builder, engineers, and key trades reduce the number of unresolved issues entering the field.
A Change Should Be a Decision, Not a Surprise
Change is part of creating a one-of-a-kind home. Surprise does not have to be.
A well-managed project gives the owner enough information to decide whether a change is worth making before the cost and schedule consequences become irreversible.
If you are planning a Scottsdale custom home and want a preconstruction process built around clearer scope, realistic allowances, and earlier decisions, start a conversation with Bella Legacy.
