The last set of plans must be kept at the construction site until:

• A. Project Is Budgeted
• B. The Project Is Completed
• C. The Next Phase Begins
• D. Warranties Expire

Answer: (B)

Keeping the final approved plan set on the construction site throughout the project is about having a definitive reference copy available for all stages of construction. This last set includes all addenda and changes, so inspectors and the on-site team can verify that work matches what was approved and permitted. It supports resolving any discrepancies that come up during inspections and helps in preparing accurate as-built drawings and closeout documentation. Once the project is fully completed and all inspections and approvals are in, the site can proceed to final closeout, and the reference copy is no longer needed on site. It isn’t tied to budgeting, the next phase starting, or warranty periods, which is why those options aren’t the correct basis for retention.