Legal Definition of Subcontract: An agreement between a contractor and a third party to perform certain duties that the contractor has been hired to perform. As an example, a contractor, hired to build a building, may engage a subcontractor to dig the site and put in the foundation for the building | Learn how subcontracting can benefit your construction or business project by delegating specialized tasks to expert professionals. Save time, money, and resources while ensuring each aspect is handled efficiently and to the highest standards. Discover the importance of subcontracting and tap into a network of skilled subcontractors for quality work