6 Types of Change Orders in Construction

Construction projects rarely move in a straight line. Designs evolve, field conditions change, and owners adjust their expectations as the work comes to life.

That is why change orders are such a normal part of construction. They help teams adapt while keeping the contract accurate.

When handled well, they reduce confusion and protect budgets instead of slowing progress.

According to the AGC–USACE Joint Study, change orders are one of the biggest contributors to project cost growth.

This makes it essential for general contractors, subcontractors, project managers, and owners to understand the different types of change orders and how each one affects cost, time, and workflow.

So let’s break it down. Before exploring the main types, we need a clear understanding of what a change order actually is.

What Are Change Orders in Construction?

A change order is a legally binding document that modifies the original construction contract.

It adjusts scope, cost, or schedule when new information appears, drawings change, or owners request updates. In many ways, change orders keep a project aligned with reality as it evolves.

Most change orders formalize approvals related to:

• Design updates or material substitutions
• Labor, equipment, or quantity adjustments
• Resequencing or schedule changes
• Owner-driven revisions to layout or function

Additionally, there are three core categories:

1. Additive change orders increase cost or duration.
2. Deductive change orders reduce scope or price.
3. Zero-cost change orders document changes without affecting contract value.

Once approved, the change order becomes part of the contract. Accurate documentation protects payment rights, supports audits, and keeps teams aligned.

6 Common Types of Change Orders in Construction

Change orders come in several forms, and each one affects the project differently.

Understanding these types helps contractors communicate clearly, price adjustments correctly, and prevent misunderstandings between owners, GCs, and subcontractors.

1. Cost Change Orders

Cost change orders adjust the contract value when added labor, materials, or subcontracted work increases the total price.

These are the most common types of change orders because even small field discoveries can create new work requirements.

They rely on detailed cost logs so owners understand why pricing is changing and how it was calculated.

Example: A foundation redesign may require additional concrete, reinforcing steel, or larger formwork, resulting in increased material costs and labor hours beyond the original estimate.

2. Scope Change Orders

Scope change orders modify what the project is delivering.

They often occur when owners request new features or when design teams adjust the project program, as these changes affect deliverables and usually impact multiple trades, requiring the resequencing of work.

Example: If an owner decides to add a new lobby or upgrade interior finishes, extra framing, utilities, and materials must be installed, expanding the scope for several subcontractors at once.

3. Time Change Orders

Time change orders adjust the construction schedule by extending or shortening the timeline.

They are issued when delays or accelerations interrupt the original sequencing, such as weather events, inspection delays, or fast-tracked owner requests.

Moreover, these changes can affect labor efficiency, equipment rentals, and downstream activities.

Example: Heavy rain during sitework may delay excavation and concrete pours by several days, pushing back framing crews and requiring a schedule extension to maintain safety and quality.

4. Access Change Orders

Access change orders address job-site restrictions or logistical challenges that change how crews perform the work.

Limited access may force teams to switch equipment, revise workflows, or modify delivery routes. These adjustments often reduce productivity if not planned well.

Example: If a crane cannot reach a drop zone because of nearby power lines or a limited swing radius, the team may need specialized lifting equipment or additional labor, triggering a change order.

5. Design Change Orders

Design change orders reflect updated drawings or engineering revisions issued during construction.

These updates often require coordination between multiple trades and careful review to avoid rework.

Also, they can affect procurement timelines and inspection requirements.

Example: If the architect revises the façade design to include a new cladding system, installers may need new brackets, waterproofing details, and inspection steps, which shift both costs and timelines.

6. Value Engineering Change Orders

Value engineering change orders introduce cost-saving alternatives without reducing quality.

They are often proposed by contractors who identify more efficient materials or installation methods based on field experience.

When done well, they can protect margins while improving constructability.

Example: Replacing traditional stick-built partitions with modular wall panels can reduce installation time and labor needs while maintaining the expected level of finish.

Why Change Orders in Construction Happen (Triggers & Root Causes)

Change orders do not appear randomly. They usually surface when something is missing, unclear, or unexpected in the original plan.

For example, sometimes the design is incomplete, or site conditions turn out differently than expected.

When teams understand these root causes, they can reduce risk early in the project instead of reacting later.

1. Unforeseen Conditions

Even with strong preconstruction work, field surprises are common. Contractors may uncover hidden utilities, unstable soil, or structural issues during demolition or excavation.

These discoveries require immediate adjustments, new engineering, or extra labor to keep the project safe and compliant.

Also, they can delay inspections or require rescheduling of follow-on trades.

Without contingencies in place, unforeseen conditions can quickly impact both the budget and the timeline.

2. Design Errors or Omissions

Construction drawings are never perfect. Missing dimensions, conflicting details, or unclear specifications often appear only once installation begins.

When this happens, crews must pause and wait for clarifications or redesigned details, which slows the schedule and increases labor costs.

In some cases, partially completed work must be removed and redone. Many of these issues come from compressed design schedules or incomplete coordination between disciplines.

3. Owner-Driven Changes

As owners observe the project progressing, their expectations often evolve.

They may request upgraded finishes, new features, or layout changes once they see spaces framed in the field.

These updates can improve the final product but also shift quantities, costs, and schedule timelines.

Additionally, they may require new materials, additional trades, or updated inspections.

Thus, without a clear approval process, owner-driven changes can create pressure on both the budget and relationships.

4. Regulatory or Code Changes

Codes and compliance requirements can change during multi-year or phased projects. New safety, environmental, or accessibility rules may require immediate integration, even if they were not in place at the time of design.

These updates can lead to redesigns, new inspections, or different materials, all of which affect schedule and cost.

Without organized documentation, code-driven changes disrupt workflow and create confusion on-site. Staying proactive with regulations helps reduce these impacts.

5. Coordination Issues

Coordination breakdowns are a major source of change orders. Outdated drawings, missed approvals, or siloed communication can send teams in different directions.

This often leads to work being installed out of sequence or in the wrong location, which then requires correction.

A 2025 study from the Volpe Center found that more than half of all change orders stem from documentation or coordination issues.

Better planning and real-time change order management software can prevent many of these problems from escalating.

4 Impact of Change Orders in Construction

Change orders are not always setbacks. Some improve the design, enhance safety, or support better long-term performance.

The real challenge comes when change orders are not managed well or communicated clearly.

When updates move forward without structure, even small adjustments can ripple across cost, schedule, quality, and relationships.

Here is how that impact usually shows up.

1. Cost Impact

Costs can climb quickly when work has to be revised or added. Even small changes create new labor hours, extra equipment time, or additional materials that were not in the original budget.

If teams do not track these costs in real time, the project can drift off budget without anyone noticing until it is too late.

Also, misalignment between owners, GCs, and subcontractors makes this worse, since each party may price the change differently.

So, strong cost logs and transparent pricing help keep budgets predictable.

You can also read: 5 Pay App Mistakes That Delay Construction Projects (And How to Fix Them Fast).

2. Schedule Impact

Schedule delays are one of the most common effects of poorly managed change orders.

Approval cycles often take longer than expected, which pauses work and disrupts sequencing for several trades.

Additionally, a small delay in one activity can push back inspections, material deliveries, and downstream crews.

These disruptions reduce productivity and delay milestone payments. When teams use clear workflows and regularly updated schedules, these issues become easier to manage.

3. Quality and Performance

Quality often drops when changes are rushed or delivered without full context. Crews may install new details based on partial information, which leads to mistakes or inconsistencies.

This increases the likelihood of rework, one of the costliest risks on any project.

Moreover, rework disrupts workflow, forces trades back into completed areas, and can introduce extra safety hazards.

Clear drawings, complete instructions, and structured approvals help keep quality high even when changes arise.

4. Relationships and Trust

Construction depends on trust between owners, general contractors, and subcontractors. When change orders are unclear, unexpected, or poorly documented, that trust erodes quickly.

Owners may feel blindsided by new costs, and subcontractors may feel unsupported or underpaid. Over time, this tension slows progress and weakens collaboration.

Transparent communication and consistent documentation protect relationships and keep everyone aligned.

Construction Change Directive (CCD)

A Construction Change Directive allows owners to authorize immediate work when waiting for pricing would slow progress.

It is a useful tool during emergencies or time-sensitive situations, but it also requires strong documentation to avoid disputes later.

How It Works:

• The owner or architect issues the directive.
• The contractor performs the required work.
• All time, labor, materials, and equipment are tracked.
• Pricing is finalized after documentation is reviewed.

Best For: Urgent safety repairs, compliance updates, or rapid design changes.

Best Practice: Support every CCD with photos, marked-up drawings, daily logs, and time-stamped cost records so that pricing discussions later are based on clear evidence.

Related Documents in Change Management

These documents are not change orders themselves, but they support the entire change management workflow.

They help teams catch issues early, communicate clearly, and keep every contract tier aligned.

When these documents are used consistently, change orders become more predictable and easier to manage.

1. Change Event (CE)

A Change Event is the first sign that something in the field may need attention. It captures an observation, issue, or condition that could impact scope, cost, or schedule.

By logging it early, teams create a record that can be reviewed before any decisions are made.

This prevents surprises later and ensures issues are tracked from the moment they appear.

2. Potential Change Order (PCO)

A Potential Change Order is the next step once a CE shows that a project may be affected.

It alerts the owner, GC, and subs that costs or timelines could shift if the issue moves forward.

This early signal helps teams plan ahead instead of reacting at the last minute. PCOs also support transparency because everyone sees the potential change before pricing begins.

3. Change Order Request (COR)

A Change Order Request is the formal proposal from the contractor explaining what needs to change. It outlines the scope, pricing, labor needs, and schedule impact in detail.

Moreover, CORs help owners understand the full picture before approving the change.

When written clearly, they reduce back-and-forth questions and speed up the overall review process.

4. Prime Contract Change Order (PCCO)

A Prime Contract Change Order updates the official agreement between the owner and general contractor.

It defines exactly how the contract value, schedule, or deliverables will change, and as it affects the top-level contract, accuracy is critical.

Once approved, the PCCO becomes the legal record that the entire project must follow.

5. Commitment Change Order (CCO)

A Commitment Change Order updates subcontractor agreements so they stay aligned with the PCCO.

It ensures that each trade is paid properly for revised work and that their schedules match the updated plan.

Moreover, CCOs keep downstream contracts consistent and prevent gaps between what the owner approved and what subs are asked to perform.

Without them, billing disputes and scope confusion are far more likely.

Best Practices for Managing Change Orders in Construction

Change orders do not have to disrupt a project. When teams follow consistent processes, they maintain predictable budgets, smoother timelines, and stronger communication.

These five best practices help reduce surprises, protect margins, and keep everyone aligned throughout the project.

1. Standardize Documentation

Using uniform templates helps teams capture the right information every time.

This reduces confusion between the owner, GC, and subcontractors because everyone is working from the same structure.

Standardized forms also make it easier to compare pricing, track scope, and complete audits. When documentation is consistent, review cycles move faster, and disputes become less likely.

2. Communicate in Real Time

Regular coordination meetings keep teams aware of upcoming changes before they affect the schedule. Quick check-ins help identify questions or conflicts early, which reduces rework and delays.

This level of communication also builds trust between trades because everyone understands how their work affects others.

The more teams share updates in real time, the smoother the project runs.

3. Establish Clear Approval Workflows

A defined approval process helps everyone understand who signs off on cost, scope, and schedule changes.

This prevents work from starting without proper authorization and avoids confusion about responsibility.

When roles are clear, approvals move faster, and teams can plan their tasks with confidence. It also protects subcontractors, ensuring their work is documented correctly before billing.

4. Track KPIs

Key metrics offer insight into how well the change order process is working. Tracking cycle time, CO frequency, and total CO value helps teams identify bottlenecks and repeated issues.

These KPIs also highlight areas where communication or documentation may need improvement.

With accurate data, project leaders can forecast more effectively and reduce avoidable delays.

5. Integrate Digital Tools

Digital tools centralize all change-related documents in one place and reduce manual entry errors. Automated routing ensures COs reach the right decision-makers quickly, cutting down approval times.

Cloud-based construction management software also give teams real-time visibility, which improves collaboration and reduces disputes.

When technology supports the process, change management becomes more predictable and efficient.

You can also read: 9 Ways to Manage Change Orders with Construction Management Software.

How SuperConstruct Streamlines Change Order Management

SuperConstruct gives construction teams a single system to manage every change order from initial event to final approval.

Instead of chasing email threads and spreadsheets, teams get a clear, real-time view of each modification.

• Automated Workflows: Built-in routing for CORs, PCCOs, CCOs, and RFIs.
• Linked Cost Tracking: COs connect to budgets, estimates, and cost logs.
• Cloud Collaboration: Owners, GCs, and subs can review and sign in real time.
• Audit Readiness: Every action has a time-stamped digital record.

ROI Snapshot:

Project Type	Avg. Monthly COs	Time Saved	Effort Reduced
Mid-Size Commercial	25–30	3 days/project	~60%
Large Infrastructure	75+	1 week/project	~65%

If you want to see how much time and money your team can save, try our Cost-Benefit Calculator or start a free 90-day trial of SuperConstruct.

You can also read: 6 Change Order Challenges & How SuperConstruct Helps in Managing Them.

Conclusion

Change orders are part of every construction project, but they do not have to be a source of stress or unexpected costs.

When teams understand the main types of change orders in construction and the triggers behind them, they can respond quickly, manage risk, and maintain stronger relationships with owners and subcontractors.

With clear processes and modern technology, change orders become tools for better project control, not disruptions.

If you are ready to simplify change order management, explore SuperConstruct or use our cost calculator to estimate your potential savings.

Frequently Asked Questions

Q. What triggers a change order?

Change orders are usually triggered by design updates, unforeseen conditions, owner revisions, or code changes. They can also appear when expectations shift or gaps in documentation surface during construction. Catching these issues early helps reduce their impact on cost and schedule.

Q. How is a CCD different from a CO in construction?

A CCD authorizes immediate work before pricing is finalized, which helps avoid delays when urgent tasks cannot wait. A standard change order requires agreement from all parties before work begins. CCDs keep momentum going, but they require careful tracking to prevent disputes later.

Q. Who approves a Prime Contract Change Order?

Owners and architects typically approve PCCOs with input from the general contractor. Their approval formally updates the top-level contract. This ensures all major decisions about cost, scope, or schedule changes are clearly documented before work proceeds.

Q. How can GCs minimize disputes?

Document changes in real time, communicate consistently, and use clear approval workflows. Regularly reviewing drawings and keeping all trades informed also reduces misunderstandings. Consistency in process is one of the best ways to prevent avoidable conflict.

Q. How does SuperConstruct help?

SuperConstruct automates documentation, centralizes cost logs, speeds up approvals, and creates a complete audit trail. It keeps COs, RFIs, and related records in one place, which helps teams stay aligned from the first change event to project closeout.