A construction change order is a written amendment to the original contract that adjusts the scope of work, the contract price, the project schedule, or some combination of all three. It becomes binding once the owner and the general contractor both sign it, and from that point forward it replaces the affected portion of the original agreement. Change orders exist because no set of drawings perfectly predicts what a crew will find behind a wall, and no owner sees a space fully until it is framed. For commercial property owners, the useful question is not whether change orders will appear on a project but whether they arrive with enough documentation, pricing detail, and lead time to make a clear decision. Well-managed change orders protect the budget. Poorly managed ones quietly consume it.
How the Change Order Process Works for a Property Owner
Most owners encounter the change order process mid-construction, which is the worst time to learn how it works. Understanding the sequence in advance turns a stressful conversation into a routine one.
The Change Order Request Comes First
Before a change order exists, someone identifies a condition or a decision that falls outside the contract. That becomes a change order request, sometimes called a COR or a change proposal. The request is not yet a bill. It is a priced proposal describing what changed, what the general contractor recommends doing, what the work will cost, and how many days it adds to the schedule. The owner reviews it, asks questions, negotiates, and either approves or rejects it. Only after approval does it become an executed change order that modifies the contract.
The gap between request and approval is where most projects lose money. If a contractor proceeds on a verbal instruction and papers the change later, the owner has lost all negotiating leverage because the work is already installed. A disciplined general contractor will not start changed work without written authorization, even when the schedule pressure is real.
What a Complete Change Order Should Contain
A change order that only says "additional electrical work, $14,200" is not a change order. It is an invoice with a friendly name. A complete document identifies the specific drawing sheet, specification section, or field condition that triggered the change. It breaks the cost into labor, material, equipment, subcontractor pricing, and the general contractor's fee, with each line traceable to a subcontractor quote the owner can see. It states the schedule impact in calendar days, including whether those days extend the substantial completion date. It names who is responsible for the change, which determines who pays. Both parties sign it before the work starts.
Owners who insist on that level of detail in the first change order set a tone that carries through the entire build.
What Actually Causes Change Orders on Commercial Projects
Change orders in construction come from a handful of predictable sources, and knowing which category a given change belongs to tells you almost everything about who should absorb the cost.
Existing Conditions Nobody Could See
This is the most common driver in renovation and second-generation space. A restaurant taking over a former retail bay discovers the existing electrical service cannot support kitchen equipment loads. A hotel renovation opens a corridor ceiling and finds abandoned mechanical work that has to be removed before new ductwork fits. A remodel exposes structural framing that never matched the as-built drawings on file.
These are legitimate changes. No amount of preconstruction diligence eliminates them, though thorough due diligence dramatically reduces them. A general contractor who walks the building carefully, pulls existing permit records, and performs selective investigative demolition before pricing will surface most of these conditions. At the same time, the owner still has budget flexibility.
Owner Decisions and Brand Standard Revisions
The second category is the owner changing their mind, which is normal and often smart. A franchise owner upgrades a finish package after seeing a sample. A hotel developer adds outlets and USB ports in guest rooms after touring a competitor's new property. These changes cost money because they are additions, and that is a fair trade.
The franchise and hospitality version of this deserves special attention. Franchisors periodically update brand standards, approved vendor lists, and prototype drawings, and those updates do not pause for projects already in construction. A national brand can issue a revised equipment specification or a new signage package while your building is framed and the slab is poured. That is not a contractor-generated change, but it lands in the owner's lap as a change order. Building a realistic owner contingency specifically for brand-driven revisions is one of the smartest things a franchise developer can do up front.
Design Gaps and Coordination Conflicts
Drawings are not perfect. A mechanical duct and a structural beam occupy the same space on paper. A specification calls for a product that has been discontinued. Two sheets contradict each other on a dimension. These are design errors and omissions, and responsibility for them depends on the contract and the delivery method. On a design-build project, the general contractor carries that risk because they control both design and construction. On a design-bid-build project, the responsibility often sits with the design team, and the owner may have recourse.
Code Officials and Inspectors
An inspector requires an additional fire damper. A plan reviewer interprets an occupancy classification differently than the architect did. A jurisdiction updates a code cycle between permit application and inspection. These changes are rarely negotiable and almost always fall to the owner, which is exactly why permit and inspection risk belongs in the preconstruction conversation rather than the change order conversation.
Change Order, Allowance, and Contingency Are Not the Same Thing
Owners frequently conflate these three, and the confusion costs them. An allowance is a placeholder dollar amount already in the contract for a scope item that hasn't been fully specified yet, such as a flooring package or a lighting selection. When the actual selection comes in above the allowance, the difference is reconciled through a change order, but the base amount was always in the budget. A contingency is a reserve, either the contractor's or the owner's, set aside for the unknown. A contractor contingency inside a guaranteed maximum price contract absorbs certain risks without a change order. Owner contingency is money the owner holds back specifically to fund change orders when they come.
A project with no owner contingency is a project where every change order becomes a crisis. A reasonable reserve on ground-up commercial work generally runs from five to ten percent of construction cost, and renovation or second-generation work justifies the higher end of that range because the unknowns are greater.
How to Evaluate a Change Order Before You Sign It
Start by asking what would have happened if you had identified this change during preconstruction. If the answer is that the cost would have been roughly the same, the change is a timing issue, not a pricing problem. If the answer is that it would have cost significantly less, ask why it was missed.
Then check whether subcontractor quotes, not an internal estimate, back the pricing; whether the markup matches the fee structure in your contract; and whether the schedule impact is real or precautionary. Ask whether there is a less expensive way to solve the same problem, because there usually is. This is where value engineering belongs in the middle of a project, not only at the beginning. A contractor who responds to a change order request by proposing two or three alternative solutions at different price points is doing the job correctly. A contractor who presents a single number and waits for a signature is not.
Reducing Change Orders Before Construction Starts
The most valuable change order management happens before anyone breaks ground. Thorough preconstruction, complete and coordinated drawings, early subcontractor involvement, realistic allowances tied to actual selections, and honest scope review during bidding eliminate most avoidable changes. Ordering long-lead equipment early avoids substitution changes later. Verifying existing conditions in the field avoids demolition surprises. Confirming the franchisor or prototype package is current at permit submission avoids mid-build revisions.
Some change orders will still happen. That is construction. A project with zero change orders doesn't measure a good general contractor, because that number is usually achieved by burying costs elsewhere. The measure is whether we documented every change, priced it transparently, explained it clearly, and had the owner approve it before work began.
At Stonehenge Construction Services, we treat change management as an extension of our preconstruction work, not a separate billing process. Our consultative approach means we surface conditions early, price changes with full backup, and bring alternatives to the table instead of a single number. If you are planning a hotel, franchise, institutional, or industrial project and want a contractor who protects your budget through the entire build, we would welcome the conversation.
