Design-build is a method of project delivery in which one entity (the design-builder) forges a single contract with the project owner to provide both architectural/engineering (A/E) design services and construction services. Design-build is also known as design/construct and single-source responsibility.
Design-build is an alternative to design-bid-build. Under the latter approach, the owner selects and commissions an architect or engineer to prepare drawings and specifications under a design contract and subsequently selects a construction contractor to build the facility under a construction contract.
Design-build, design-bid-build, and construction management are the three project delivery systems most commonly employed in North America. Over the past 15 years, use of design-build has greatly accelerated in the United States, making this delivery method one of the most significant trends in design and construction today.

