Defined term
Substantial completion
Substantial completion is the date construction work is sufficiently complete to be used for its intended purpose — typically marked by a certificate, and the trigger for statutes of repose and warranty periods.
Substantial completion is one of the most consequential dates on any construction project. It triggers the start of the warranty period, the running of statutes of repose (Alabama's 7-year Article 13A repose; Florida's 10-year repose), the release of retainage on many contracts, and final-payment provisions.
The exact date is fact-intensive: it's not the date of final inspection, not the date of certificate of occupancy, not the date final punch-list items are done. It's the date the project can be used for its intended purpose. AIA contracts have specific architect-certification procedures; non-AIA contracts often have looser definitions that produce litigation. Owners and contractors should document the substantial-completion date precisely and contemporaneously.