Legal

Substantial Completion

The point at which a project is sufficiently complete that the owner can use it for its intended purpose.

Substantial completion is a contractual milestone that triggers several events: the warranty period begins, retainage may be partially released, the punchlist is generated, and the contractor's liability for delay damages typically ends. It does not mean 100% complete — small punchlist items may remain. The architect or owner certifies the date. State laws vary on what defines substantial completion if not specified in contract.