Design-Build vs. Design-Bid-Build: Which Delivery Method Wins?
The project delivery method shapes everything: who carries design risk, how the schedule compresses, and how the GC makes margin. Owners and GCs both need to understand the trade-offs before signing.
Design-bid-build (DBB)
Owner hires architect, design is completed, then GCs bid on completed drawings. Most common public works delivery. Clear separation of design and construction risk, but slowest schedule and most adversarial.
Design-build (DB)
Single entity (or joint venture) carries both design and construction. Faster delivery, single point of accountability, but owner gives up some control over design decisions.
Construction Manager at Risk (CMAR)
GC joins during design, provides preconstruction services, then commits to a Guaranteed Maximum Price. Hybrid of DBB and DB — good for complex private projects.
Integrated Project Delivery (IPD)
Owner, designer, and GC share a single contract with shared risk and reward pools. Rare but powerful on large healthcare and institutional work.
Which one wins?
Public agencies often default to DBB. Sophisticated private owners increasingly use DB or CMAR for schedule and budget certainty. The right answer depends on owner sophistication, design completeness, and schedule pressure.
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Frequently asked questions
Which delivery method is fastest?
Design-build is typically the fastest because design and construction overlap. DBB is the slowest because construction can't start until design is complete.
Which delivery method is cheapest?
DBB tends to produce the lowest hard-bid number, but change orders and delays often erode the savings. DB and CMAR usually deliver better total cost certainty.
What's CMAR?
Construction Manager at Risk — the GC joins during design, provides preconstruction services, then commits to a Guaranteed Maximum Price. Hybrid of DBB and DB.
Which method do public agencies use?
Public agencies historically default to DBB, but many states now allow DB and CMAR for specific project types.
Bottom line
Delivery method is a strategic choice. GCs who can perform across multiple delivery methods win in more market conditions.
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