Change Order

A Change Order is a fundamental instrument in project management, construction, and contract work. It acts as the formal mechanism for modifying the scope, timeline, or cost of an original contract. While the initial statement of work outlines the agreement between parties, the reality of executing complex projects often necessitates adjustments. Without a structured Change Order process, these adjustments can lead to "scope creep," budget overruns, and damaged professional relationships.

This guide provides a comprehensive look at how to draft, manage, and execute Change Orders effectively, ensuring that both the client and the service provider remain protected and aligned throughout the project lifecycle.

What is a Change Order?

A Change Order is a written document used to amend an existing construction or services contract. It formally authorizes a change in the work scope, adjusting the contract price and/or completion schedule accordingly.

Think of the original contract as a roadmap. A Change Order is the official detour. It acknowledges that the path has shifted for a valid reason and outlines exactly how that shift impacts the destination (the deliverables), the fuel required (the budget), and the arrival time (the schedule).

The Legal and Financial Necessity

From a legal standpoint, a Change Order is a mutual agreement. It serves as an amendment to the original contract. Without it, any additional work performed outside the original statement of work may be deemed uncompensable or may expose the performing party to liability for delays.

Financially, Change Orders protect the profit margins of the service provider by ensuring that extra costs (materials, labor, equipment) are reimbursed. Conversely, they protect the client by preventing "surprise" billing and requiring transparency regarding exactly what they are paying for and why it is necessary.

Types of Change Orders

Change Orders generally fall into three categories:

1. Additive Change Order: This adds work to the project that was not originally included. This naturally increases the contract price and may extend the schedule.
   • Example: A homeowner decides to add a deck to a home renovation contract halfway through the project.
2. Deductive Change Order: This removes work from the project. The client saves money, though the savings are rarely a 1:1 ratio with the original price due to lost efficiency or mobilization costs.
   • Example: A software client removes the need for a mobile app interface, deciding to focus solely on the web platform.
3. Neutral Change Order: This alters the scope of work without changing the contract price. This usually involves swapping one specified material or method for another of equal value.
   • Example: A specific brand of paint is out of stock, so the contractor swaps it for a comparable brand at the same cost.

When to Use a Change Order

A Change Order should be utilized whenever there is a deviation from the agreed-upon plan defined in the original contract. It is tempting to handle small changes informally to "keep things moving," but this is a dangerous habit. If a change affects the resources, timeline, or quality of the project, it requires a Change Order.

Here are the specific scenarios where a Change Order is mandatory:

1. Client-Initiated Scope Changes

This is the most common scenario. The client sees the project progressing and decides they want something different or something additional.

• Scenario: During an office fit-out, the client decides they want glass partitions instead of drywall.
• Action: Stop work on the walls, draft a Change Order for the new materials and labor differences, get approval, then proceed.

2. Unforeseen Site Conditions (Hidden Conditions)

This is prevalent in construction and engineering. You cannot work on what you cannot see until you break ground.

• Scenario: An excavation team hits solid bedrock where soil was expected, requiring specialized drilling equipment.
• Action: Document the condition, assess the cost of the extra labor and equipment, and submit a Change Order to the client for approval.

3. Design Errors or Omissions

Sometimes, the architect, engineer, or the original business proposal missed a critical detail.

• Scenario: The architectural drawings show a door leading to a void because a floor plan was misaligned.
• Action: The design team issues a correction, and the contractor issues a Change Order to cover the costs of moving structural elements.

4. Material Unavailability or Substitutions

If the specified materials are no longer available or have skyrocketed in price, a substitution may be necessary.

• Scenario: A global supply chain shortage makes the specified lumber unavailable for three months.
• Action: Propose an alternative material via a Change Order. If the alternative is cheaper, a credit is issued; if more expensive, a cost increase is added.

5. Regulatory or Code Changes

If local laws change between the signing of the contract and the execution of the work, compliance is not optional.

• Scenario: The city changes the fire safety code, requiring more sprinkler heads in the building.
• Action: This is a force-majeure style change. The contractor must install the heads to pass inspection, and the Change Order bills the client for this mandatory requirement.

6. Schedule Extensions (Time Changes)

Sometimes the scope doesn't change, but the timeline does due to factors outside the contractor's control (e.g., extreme weather). While this might not cost money in labor directly, it may incur "General Conditions" costs (site trailer rental, insurance extensions).

• Action: Submit a Change Order for the time extension and associated carrying costs.

Key Components and Sections

A vague Change Order is a recipe for a dispute. To be enforceable and useful, the document must be granular and specific. While formats vary by industry, a robust Change Order must contain the following sections:

1. Project Information

This establishes the context. It must match the original contract exactly to avoid administrative confusion.

• Project Name and Number
• Client Name and Address
• Contractor/Vendor Name
• Original Contract Date and Number
• Change Order Number (e.g., "CO-001")

2. Description of the Change

This is the core narrative. It must explain the what and the why.

• Current State: Describe what is currently happening or what the original plan was.
• Proposed Change: Detail the new work.
• Reason for Change: Is this a client request? A site condition? A code issue?
• Visuals: Attach photos, drawings, or redlined plans to visually illustrate the change.

3. Cost Breakdown

Never simply put a total dollar amount. You must justify the numbers.

• Material Costs: Cost of raw goods.
• Labor Costs: Hours required x hourly rate.
• Equipment: Rental fees or usage hours for machinery.
• Subcontractor Fees: Fees charged by third parties brought in for the change.
• Overhead and Profit: Most contracts allow the contractor to add a markup (usually 10-15%) on change orders to cover administrative burden and profit risk.
• Net Impact: The final total increase or decrease.

4. Schedule Impact

A change that adds $5,000 but adds three weeks to a deadline is very different from a $5,000 change that adds no time.

• Revised Completion Date: State the new end date if applicable.
• Critical Path Analysis: Briefly explain how this change affects the workflow of other teams (e.g., "The electrical delay pushes the framing crew back two days").

5. Authorization Signatures

The document is legally invalid until signed. Depending on the contract structure, you may need:

• Project Manager (Client side)
• Director/Owner (Client side) – usually required for changes over a certain dollar threshold.
• Project Manager/Contractor (Vendor side)
• Date of Signature

How to Write a Change Order (Step by Step)

Writing a Change Order is not just about filling out a template; it is about negotiation and documentation. Follow this workflow to ensure the process is smooth and professional.

Step 1: Identify the Need and Verify the Scope

Before touching a keyboard, verify that the requested change is actually outside the scope of the original contract. Review the original statement of work.

• Self-Correction: If the client says, "You promised this would be included," but the SOW is vague, you have a "grey area." It is better to issue a Change Order for the clarification to avoid conflict later, or write a "clarification letter" if you agree it was included.

Step 2: Quantify the Impact

Gather your team. Ask the estimator for pricing and the scheduler for timeline impact.

• Pricing: Be realistic. Don't pad the price excessively, or the client will reject it. Don't underprice it, or you will lose money.
• Timeline: Look at the calendar. Does this change require work on a weekend (overtime rates)?

Step 3: Draft the Document

Using the components listed above, draft the Change Order.

• Be specific: Instead of writing "Install extra outlet," write "Install one additional duplex receptacle at the north wall, 12 inches from the corner, including 50 feet of 12/2 Romex wire and a new 20-amp breaker."
• Reference the Original Contract: Use the same terminology found in the initial business proposal or contract to maintain continuity.

Step 4: Internal Review

Before sending it to the client, have a senior manager or owner review it, especially if the amount is significant.

• Check: Does this math add up?
• Check: Is the tone professional? Even if the client is being difficult, the Change Order should be a neutral, factual document.

Step 5: Submit to Client (Notification)

Send the Change Order to the client contact. It is best practice to send it via email and a project management platform.

• The Subject Line: Make it clear. e.g., "Change Order #2 Request - Site Lighting Upgrade - $4,500."
• The Body: Briefly explain that work cannot proceed on this specific item until approval is received.

Step 6: Negotiation and Revision

It is rare for a client to sign a Change Order immediately without questions. Be prepared to discuss the cost.

• Stand firm on facts: If the cost of steel has gone up, show the market indices.
• Be flexible on solutions: If the client thinks $10,000 is too expensive for marble, offer a quartz alternative.
• Do NOT start the work: Until the signed document is returned, the original scope stands. Starting work on a verbal approval is a massive risk.

Step 7: Execution and File Management

Once signed:

1. Distribute copies to the field crew (so they know what to build/execute).
2. Update the project budget in your accounting software.
3. Update the master schedule.
4. File the signed CO in the project binder (physical and digital).

Step 8: Invoice Against the Change Order

When billing, do not lump Change Order work into the regular progress billing. Create a separate line item on the invoice referencing the Change Order number. This helps the client’s accounting department cross-reference the approved amount against the bill.

Common Mistakes to Avoid

Managing Change Orders is where many projects lose profitability. Avoiding these pitfalls is critical to business health.

1. Proceeding on Verbal Approval

This is the number one cause of payment disputes.

• The Mistake: The client says, "Just go ahead, it's fine," while you are on site. You do the work. Two weeks later, they refuse to pay because they didn't realize it would cost that much.
• The Fix: A "Pending Change Order" can be issued for urgent safety issues, but standard work requires a signature. If a client pushes you to start immediately, send an email: "Per our conversation, we are starting work on X at a cost of Y, pending signature of Change Order #Z."

2. Vague Descriptions

"The contractor will fix the wall" is not a Change Order description.

• The Mistake: You patch the wall, but the client wanted it replaced. They refuse to pay.
• The Fix: "Contractor will patch, sand, and paint a 4x4 area of drywall."

3. Failing to Account for Disruption Costs

Most Change Orders correctly calculate the direct cost (materials + labor). However, they often miss the indirect cost.

• The Mistake: A client adds a room in the middle of a project. You charge for the room's materials. But because you shifted crews to the room, the main kitchen installation stopped for two days. You lost two days of productivity on the kitchen.
• The Fix: Include "lost efficiency" or "mobilization/demobilization" costs in your pricing.

4. Ignoring the "Time" Component

A $500 change order that pushes the deadline back by one month is a disaster for the client.

• The Mistake: Focusing only on the dollar amount and neglecting to tell the client that the project will now finish in December instead of November.
• The Fix: Always include the schedule impact, even if it is "Zero days impact."

5. Lack of Documentation

If you didn't write it down, it didn't happen.

• The Mistake: Relying on phone call memories when finalizing the Change Order.
• The Fix: Keep a log. When a client requests a change, send a confirmation email immediately: "Just to confirm our phone call, you requested X. I will prepare a formal quote shortly."

Tips for Success

Mastering the Change Order process improves cash flow and client relations. Here are strategies used by top-tier firms:

Establish a "Change Order Budget" in the Proposal

When writing your initial business proposal, include a line item for "Contingency" or "Allowances." This sets a psychological baseline for the client that changes cost money. If they have a specific budget for allowances, it makes dipping into it less painful later.

Use a Standardized Template

Do not create a new Word document layout for every change. Use a consistent template. This trains your clients to look for the important information (Cost, Time, Signature) in the same place every time. It makes you look more organized and professional.

Be Proactive, Not Reactive

Don't wait for the client to ask. If you see a problem on the horizon (e.g., "We are going to run out of space for the HVAC units"), alert the client immediately. Present the problem and the solution (via a Change Order) at the same time.

Educate the Client Early

During the project kickoff meeting, explain the Change Order process. Show them a blank form. Tell them: "If you want to change something, this is the form we will use. It protects both of us." Clients are less resistant to signing them if they knew the process existed from Day 1.

Price Quickly

The momentum of a project is real. If a client wants a change and you take three weeks to price it, they may get frustrated or lose interest. Or worse, they may ask you to "just do it" and waive the paperwork because you were too slow. Aim for a 24-48 hour turnaround on Change Order pricing.

Track the "Approved vs. Billed" Status

Sometimes a Change Order is signed for $10,000, but you only do $8,000 of work before the project ends.

• Tip: Issue a "Credit Change Order" to close the gap, or ensure your final invoice reflects the actual amount, referencing the approved CO. This builds immense trust.

Example Change Order

Below is a realistic example of a Change Order for a commercial office renovation project.

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CHANGE ORDER #2023-04

Project: Downtown Office Complex - Lobby Renovation Contract Number: OC-2023-88 Date: October 12, 2023

From: Apex Construction Contractors To: Horizon Real Estate Management

1. DESCRIPTION OF CHANGE

Original Scope: The original Contract Documents dated July 1, 2023, specified vinyl composition tile (VCT) flooring for the Lobby Reception Area (approx. 500 sq. ft.).

Requested Change: The Owner has requested to upgrade the flooring materials to polished porcelain tile with a decorative inlay border.

Reason for Change: Owner preference for aesthetic upgrade.

2. COST IMPACT

Item Description	Qty	Unit	Unit Cost	Total Cost
Removal of Existing VCT (Included)	500	Sq. Ft.	$0.00	$0.00
Porcelain Tile (Material)	500	Sq. Ft.	$8.50	$4,250.00
Decorative Border Inlay (Material)	50	Ln. Ft.	$25.00	$1,250.00
Tile Setting Labor (Increased Difficulty)	500	Sq. Ft.	$6.00	$3,000.00
Thinset & Grout	1	Lot	$500.00	$500.00
SUBTOTAL				$9,000.00
Overhead & Profit (10%)				$900.00
CREDIT: Deleted VCT Materials				($500.00)
NET COST INCREASE				$9,400.00

Contract Sum Adjustment: + $9,400.00 Revised Contract Sum: $254,900.00

3. SCHEDULE IMPACT

The installation of porcelain tile requires a longer curing time for the thinset and grout compared to VCT.

• Additional Time Required: 3 Calendar Days.
• Original Substantial Completion Date: November 15, 2023.
• Revised Substantial Completion Date: November 18, 2023.

4. AUTHORIZATION

By signing below, the Client agrees to the additional cost of $9,400.00 and the schedule extension of 3 days. Work will not commence on this change until this document is signed.

Client Signature: __________________________ Date: __________ (Printed Name: Jane Doe, Facilities Director)

Contractor Signature: ________________________ Date: __________ (Printed Name: John Smith, Project Manager)

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Frequently Asked Questions

1. What is the difference between a Change Order and a Change Directive? A Change Order is a mutually agreed-upon document signed by both parties detailing the cost and schedule impact. A Change Directive is usually issued by the client/owner in an emergency situation when an agreement on cost hasn't been reached yet, but work must proceed immediately to avoid project stoppage. The contractor is often required to perform the work under a Change Directive, with the costs determined later.

2. Can a client refuse to pay for a Change Order? Yes, a client can refuse to sign or pay for a Change Order if they believe the work was included in the original contract or if the price is deemed unreasonable. If you (the contractor) proceed with the work without a signed signature, you are essentially acting at your own risk. If they refuse to pay, your only recourse may be litigation, which is expensive. This is why you should never perform the work until the Change Order is signed.

3. How much markup should I put on a Change Order? Standard industry practice varies, but 10% to 15% for overhead and profit is common for general contractors. Subcontractors typically mark up their change orders less (perhaps 5-10%). It is important to check your original contract, as some master service agreements cap the allowable markup on changes.

4. Who is responsible for drafting the Change Order? Typically, the party performing the work (the contractor or vendor) drafts the Change Order. They are the ones who know the labor and material costs. However, the client or their architect/engineer can technically draft one as well, though the contractor would still need to review and sign off on it to agree to the terms.

5. Do small changes need a formal Change Order? It depends on your contract terms. Many contracts have a "minor change" threshold (e.g., changes under $500 can be handled with a simple field order or email). However, best practice is to document everything. A stack of $200 changes can add up to $5,000 by the end of a project. If you haven't been documenting them, the client will likely refuse to pay that lump sum at the end.

6. How does a Change Order affect the retainage (holdback)? Retainage is the percentage of money held back by the client until project completion to ensure the work is done. Change Orders usually fall under the same retainage terms as the original contract. If the original contract holds 10%, the Change Order amount is also subject to that 10% holdback. This should be clarified in the general conditions of your contract.