What defines the date of completion in a construction project?

The date of completion in a construction project is defined by the date specified in the contract when substantial completion occurs. Substantial completion marks the point at which the work is sufficiently complete in accordance with the contract documents, allowing the owner to occupy or use the work for its intended purpose. This date is significant because it influences various aspects of the project, such as warranty periods, the start of final payment obligations, and the timing for the completion of any remaining minor work or corrections. Recognizing substantial completion also provides clarity on when the contractor has fulfilled their primary obligations under the contract, making this definition central to understanding project timelines and responsibilities.

While final invoices, project initiation dates, and final inspections are important milestones in the lifecycle of a construction project, they do not accurately define the completion date. The final invoice may be issued after substantial completion, the project initiation date does not reflect completion, and the final inspection primarily assesses if the work meets requirements rather than defining when it is officially complete.