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Change Order: A formal modification to a construction contract’s scope, cost, or schedule.

Term Definition - A change order is a formal, written agreement that amends the original construction contract by modifying the scope of work, the contract sum, or the project schedule. It is a legally binding document that requires mutual consent from the project owner, the contractor, and often the architect. Change orders are an inherent part of most construction projects, acting as a crucial mechanism for adapting a fixed agreement to the dynamic reality of a job site, where unexpected conditions or owner-requested changes frequently arise.

A Detailed Explanation

The change order process is a key element of effective project management, often initiated by a Change Order Proposal (COP). The need for a change can be prompted by:

  • Client Requests: A project owner may decide to upgrade materials, add a new feature, or alter a design element after the contract is signed.
  • Unforeseen Conditions: The contractor may discover a surprise, such as a rock formation during excavation or a structural issue behind a wall, that was not accounted for in the original plans.
  • Design Corrections: The architect or engineer may issue a change to fix an error or omission in the original drawings.

Once the need for a change is identified, the contractor or design team prepares and submits a Change Order Proposal to the owner. This proposal details the specific work to be done, provides a breakdown of all associated costs (labor, materials, equipment), and outlines the estimated impact on the project schedule. 

The project owner reviews the proposal and has the option to approve, reject, or negotiate. Once all parties have agreed, the formal Change Order is signed, and it becomes a legal amendment to the original contract. Modern construction management software is designed to streamline this entire process, from proposal to final signature, providing a centralized platform for real-time tracking, communication, and electronic documentation.

Origin/Etymology

The construction term “change order” is a modern business term with a clear, functional etymology. “Change” is from the Old French “changier,” meaning “to exchange” or “alter.” “Order” comes from the Latin “ordo,” meaning a “row” or “sequence,” and in a modern context, refers to a formal command or directive. The term, therefore, literally means a “formal directive for an alteration.” The concept of formalizing changes to contracts is ancient, but the specific term became standard in the construction industry in the 20th century to manage the increasing complexity of projects and the need for a formal, auditable process to track modifications.

Example

A general contractor, ‘BuildCo,’ is constructing a commercial office building. The original plans called for a specific type of standard-grade HVAC system. During the project, the project owner decides they want a high-efficiency HVAC system to meet new energy standards. BuildCo would issue a Change Order Proposal. The proposal would specify:

  • Reason: “Owner-requested upgrade.”
  • Scope Change: “Replace standard HVAC system with new high-efficiency model.”
  • Cost: An increase of $75,000 for the more expensive equipment and additional labor.
  • Schedule: An extension of 14 days due to the longer lead time for the new system. 

The owner reviews the proposal. If they approve it, they sign the change order, and the contract sum is increased by $75,000, and the project completion date is officially extended by two weeks. This creates a clear legal record for all parties.

Use Cases 

Change orders are used in a variety of situations to formally document project modifications, including:

  1. Owner-Initiated Modifications: Adding a new feature, upgrading materials, or altering a design element after construction has begun.
  2. Unforeseen Site Conditions: Discovering unexpected geological conditions, buried utilities, or hazardous materials that require a deviation from the original plan.
  3. Design Flaws: Correcting errors or omissions in the original architectural or engineering drawings that are discovered during construction.
  4. Value Engineering: Formalizing cost-saving alternatives proposed by the contractor, which may involve a reduction in cost and a corresponding credit to the owner.

Benefits & Drawbacks

Benefits:

  • Risk Mitigation: Provides a formal process for addressing unforeseen challenges, reducing the likelihood of costly and time-consuming disputes.
  • Transparency & Accountability: Ensures that all modifications to the project scope, cost, and schedule are clearly documented and agreed upon by all parties.
  • Budget & Schedule Control: Prevents unapproved work and ensures that the financial and timeline impacts of all changes are known before the work is performed.

Drawbacks:

  • Time & Cost Overruns: A high volume of change orders can significantly slow a project down and is a leading cause of budget overruns, as cumulative costs can be hard for owners to track.
  • Potential for Disputes: The negotiation of cost and time for a change order can be a major source of conflict between the contractor and the owner.
  • Administrative Burden: Managing change orders can be a time-consuming administrative task, especially on projects that rely on manual, paper-based processes.

Q&A

To formally amend an existing contract to reflect a change in the project’s scope, cost, or schedule, ensuring all parties are in legal agreement.

The project owner and the contractor must both sign the document. In some cases, the architect’s signature is also required.

A COP is a document prepared by the contractor or designer that proposes a change and its associated costs and time. A Change Order is the final, executed legal document signed by all parties.

Common causes include unexpected site conditions, owner-requested design changes, or errors found in the original plans.

A change order will typically either extend the project’s completion date or accelerate it, depending on the scope of work added or removed.

Yes. While they are meant to prevent disputes, disagreements over the proposed costs or time extensions for a change are a frequent source of conflict.

Software streamlines the process by providing a centralized, electronic platform for submitting, reviewing, and approving change orders, reducing manual errors and time delays.

The main risk is a lack of formal documentation, which can lead to disputes over who authorized the work, the cost of the work, or the responsibility for delays.