Quick Summary
- Design-build contractors carry the risk of their engineer's drawings
- AI review of 90% sets catches issues before they become your construction problems
- Multiple review rounds with recheck discounts fit the iterative design process
- Protect margins by catching coordination issues before construction starts
In design-build, you don't just build what someone else designed—you own the design. That means when your engineer's drawings have issues, they're your issues. AI plan review gives you a systematic check of your engineer's work before those drawings become your construction problem.
The Design-Build Risk Profile
Design-build delivery has advantages—single point of responsibility, faster delivery, better collaboration. But it also means:
You Own the Design Risk
In traditional delivery, design errors are the architect's problem. In design-build, they're yours. Your engineer's mistake becomes your change order—not theirs.
Fast-Track Creates Overlap
Design-build projects often fast-track—starting construction before design is complete. Issues discovered later are more expensive because work is already in place.
Fixed Price Often Applies
Many design-build contracts have GMP or lump sum provisions. Design issues eat into your margin, not the owner's contingency.
Checking Your Own Engineer's Work
This isn't about distrust—it's about catching what everyone misses:
Reality Check
We reviewed a church project from a 50-year veteran architect. Found 364 issues. A fire station from a 2,600-employee engineering firm had 205 issues. Document quality problems happen at every level. The question is when you find them.
Your engineer is doing their best. But they're also juggling multiple projects, tight deadlines, and the inherent complexity of coordinating multiple disciplines. AI is a systematic check that catches what human attention naturally misses.
The Progress Set Review Workflow
Design-build projects evolve through milestones. AI review fits naturally into this process:
Iterative Review Process
First comprehensive AI check. You'll likely find 100-300+ issues. Share findings with your engineer to address before 100% set.
Your engineer addresses the findings. Fixes issues, clarifies conflicts, updates details. This is when catching issues is cheap.
Verify the fixes and catch any new issues introduced by changes. Should find fewer issues—but revisions sometimes create new problems.
What Design-Build Contractors Should Check
Cross-Discipline Coordination
- • Structural vs architectural conflicts
- • MEP routing and clearances
- • Civil to building interface
- • Fire protection coordination
Spec vs Drawing Consistency
- • Material specifications match drawings
- • Finish schedules align with specs
- • Equipment specs match MEP drawings
- • Structural steel specs match details
Code Compliance
- • Building code requirements
- • Accessibility (ADA/local)
- • Fire and life safety
- • Energy code compliance
Constructability
- • Sequencing conflicts
- • Access and clearance issues
- • Missing details and dimensions
- • Coordination with specialty items
Real Example: Water/Wastewater Design-Build
Design-Build Contractor Perspective
"We do a lot of design-build on water and wastewater treatment plants. We're at 90% drawings right now—probably going to have another chunk on top of that before we're at 100%.
"We've got so many people looking at and reviewing stuff, but even myself, I haven't had time to get into the details like I like to. Looking for a way to maybe catch the stuff we're missing.
"If it's the small stuff—and again, we're getting comments during review, spelling errors, check this, check that—but there's a lot that still gets missed that's beyond that level."
Protecting Your Margin
In design-build, every design issue you don't catch before construction is margin erosion:
The Math on Margin Protection
Check Your Engineer's Work
In design-build, their issues become your issues. AI review at 90% catches problems when they're still cheap to fix—before they become field rework.
Conclusion
Design-build delivery puts you in control—and in the line of fire. Your engineer's drawings are your responsibility. When they have issues, you're the one who pays for rework, absorbs schedule delays, and explains problems to the owner.
AI review of progress sets gives you a systematic check that catches issues while they're still drawings—not concrete and steel. At $750 for two rounds of review on a major project, the ROI on catching even one significant issue is overwhelming.
Trust your engineer. But verify their work before it becomes your problem.