Design-bid-build is a delivery method in which the owner contracts separately for design and construction.
Definition
In design-bid-build, the owner generally hires a design professional to develop project documents and separately contracts with a builder to construct the work. Contractors typically submit bids based on the documents, subject to the procurement and contract requirements. The project documents set the design scope, expected level of completion, schedule, and responsibilities for responding to questions or changes during construction. For a civil engineering firm, the separation can clarify its role, while construction-phase services and coordination still need to be defined in its agreement. Design-bid-build is not a guarantee that documents will be complete or that construction will proceed without changes. It differs from design-build, where one entity contracts with the owner for both design and construction. The method's precise sequence and risk allocation depend on the project and governing rules. Public procurement requirements may apply, and federal projects should be considered under relevant FAR Part 36 provisions and solicitation terms.
How owners use it
- Confirm which design deliverables and construction-phase services are included in the firm's agreement.
- Plan staff availability for bidding support, contractor questions, submittal review, or field observations when contracted.
- Example: A $90,000 design fee plus a $10,000 construction-phase services fee equals $100,000 in total contracted fees.
- Track owner-requested document changes against the agreed scope and authorization process.
