Which document is typically required to formalize any changes made to an original construction contract?

To formalize any changes made to an original construction contract, a Change Order is typically required. A Change Order serves as an official document that outlines the specifics of the alteration, including any adjustments to the project scope, cost, and schedule. It is formally agreed upon by all parties involved, ensuring that everyone is on the same page regarding the modifications being made. This is particularly essential in construction projects where changes might impact timelines and budgets significantly.

On the other hand, while an Addendum can modify the terms of the contract, it is often used to add new sections rather than specifically address changes to scope or costs. A Notice of change may notify the other party of an intended change, but it does not provide the formal agreement needed to implement those changes. Lastly, a Supplemental Agreement is also used to make changes but is less common in standard practices for construction projects compared to Change Orders, which are widely recognized in the industry for this specific purpose.