Design-build promises the owner a single point of responsibility. The design-build entity is responsible for performing both the design and the construction of a project, which means when something goes wrong, there’s one party to hold accountable. But it’s not always clear on the job who exactly that party should be.
An AIA design-build contract is where that question gets settled. A141® – Agreement Between Owner and Design-Builder sets out what the design-builder warrants, how long the owner can send nonconforming work back to be corrected, and what happens when the owner hands over drawings that tell the design-builder how to build something.
What a Design-Build Contract Covers
A141 is the primary agreement between owner and design-builder. The rest of the contracts flow down from this prime agreement based on the needs of the project, the design-builder’s ability to self-perform work and services, and their need to hire other entities to assist. The right agreement set depends on the needs of the design-builder and the requirements of the project.
Quick Decision Guide: Which Design-Build Document Does Your Project Need?
Document | Use Case |
The primary contract on a traditional design-build project, covering the owner’s criteria, the preliminary design, and the design-build amendment that sets the contract sum. | |
An owner and design-builder agreement to use instead of the traditional A141 when the parties intend a progressive design-build delivery method, where design and price develop in phases. | |
A145™ – Abbreviated Agreement Between Owner and Design-Builder | A short agreement for less complex projects that do not need the full A141. |
B141™ – Design-Builder and Architect Agreement – Traditional Design-Build | A menu of architect services rather than a fixed scope, for when the design-builder contracts the design out. |
The same relationship on a progressive design-build project. | |
A subcontract for a portion of the work, including where the subcontractor provides professional services of its own. | |
C141™ – Agreement Between Owner and Consultant for a Design-Build Project | A consultant agreement for an owner who needs advice on the project. |
C441™ – Agreement Between Architect and Consultant for a Design-Build Project | A consultant agreement for an architect who needs help with part of the design. |
A Warranty and a Correction Period Are Not the Same Thing
A warranty is a promise about how the work was built. A correction period is the year after substantial completion when the design-builder has to come back and fix work that does not match the design-build documents. Different failures trigger them, different evidence proves them, and drafting one does not get you the other.
Under A141, the design-builder warrants that materials and equipment will be of good quality and new unless the contract requires otherwise, and that the work will be free from defects. The design-builder also agrees that they will correct work for one year after substantial completion if the work is not in accordance with the requirements of the design-build documents.
| Warranty | One-Year Correction Period |
What is Promised | The work conforms to the contract documents and is free from covered defects | The design-builder will promptly correct work that does not conform to the design-build documents |
What Triggers It | Covered defects or nonconforming work | The owner gives the design-builder written notice of a nonconforming condition within the one-year correction period |
How It Is Proven | Inspection of the work against the contract requirements | The owner’s observation that the work is not in conformance with the design-build documents |
Typical Remedy | Repair or replacement of the nonconforming work | The design-builder corrects the work at no cost to the owner, provided that all contractual conditions are met |
Where It Lives | The agreement’s warranty provisions | The design-build agreement’s correction of work provisions |
What Happens After the Correction Period Ends?
The design-builder’s warranty obligation extends beyond the one-year correction period. If the owner discovers a defective condition beyond the one-year period, the design-builder may have liability for that breach, but the owner does not have the right to order the design-builder back to the jobsite to perform corrective construction work.
Several other clocks run alongside the correction period as well. Contractual warranty rights, statutes of limitation and repose, and manufacturer warranties each follow their own timelines, and obligations attached to the work can survive after the correction period closes.
How the Spearin Doctrine Applies to Design-Build
The Spearin doctrine says that an owner who supplies design specifications and drawings impliedly warrants that they are adequate for their purpose, and that a contractor who follows them is not liable when they prove defective.
Design-build narrows that considerably. The design-builder produces the design, so there are usually no owner-supplied specifications and drawings to warrant. The doctrine becomes relevant at one place: owner-supplied information, often referred to as the owner’s criteria or bridging documents, that communicates the owner’s project goals and early conceptual design for the project.
Owners rarely start a design-build procurement with a blank page. They issue criteria, often in the form of bridging documents, and those documents sit somewhere on a spectrum. A performance specification states the required result and leaves the method to the design-builder. A design specification prescribes the method. The more an owner’s document prescribes the method, the harder it is to argue the design-builder is responsible for a problem that they followed instructions to create. Owner criteria and bridging packages often mix both types in the same document, with nothing marking which is which.
Bonds Are a Separate Layer
A bond is neither a warranty nor a performance guarantee. It is a surety instrument, which means a third party is standing behind an obligation the contract defines.
A312® – Performance Bond protects the owner if the contractor defaults, and the surety must either arrange completion of the work or compensate the owner for the loss, subject to the bond’s conditions. A312® – Payment Bond covers the contractor’s obligations to pay subcontractors and suppliers. They are separate instruments covering separate risks.
A313™ – Warranty Bond is narrower, and it’s often misread. It supports the contractor’s warranty obligations as the construction contract defines them, which means its coverage is only as broad as that warranty language. It does not extend to warranties from the contractor’s suppliers and manufacturers.
Liquidated Damages in Design-Build
There is no separate AIA liquidated damages form for design-build. Delay damages are set out in the agreement itself, alongside the time provisions and the mutual waiver of consequential damages.
The mechanism exists, but since it’s not a standalone document, the figure is something that parties negotiate rather than something a form supplies.
Two constraints shape the negotiation:
- A liquidated damages amount has to be a reasonable estimate, made at the time of contracting, of a loss that would be hard to calculate after the fact. If a liquidated damages amount is unreasonable and is not tethered to a realistic forecast of future damages, it is possible that a court will not enforce it.
- The mutual waiver of consequential damages and the liquidated damages provision work together. If an owner waives consequential damages and then sets a low delay rate, they have given up one remedy and underpriced the other. These provisions should be negotiated together, and it is common for a final design-build agreement to allow liquidated damages or consequential damages, but not both.
Start With the Right Design-Build Agreement
A141 and the design-build family outline who carries design liability, what the design-builder warrants, and how long the owner can send work back. Coordinated documents consistently clarify those responsibilities across the project team, so the answers line up instead of contradicting each other.
Frequently Asked Questions
A141 is the primary agreement between the owner and the design-builder on a traditional design-build project. B141 covers the design-builder and the architect, A441 covers the subcontract, and C141 and C441 cover consultants. The owner signs one agreement with one party responsible for both design and construction.
A warranty is a promise that the work conforms to the contract documents and is free from covered defects. A performance guarantee is a promise that the finished project will reach a measurable operational outcome, such as a throughput rate or an energy figure. A warranty is about how the work was built. A performance guarantee is about what it does once it is running.
Largely yes, and that is the point of the delivery method. The complication is owner-supplied information. Where the owner hands over bridging documents that dictate how something must be built, that material can behave as a design specification, and responsibility for it may not sit with the design-builder.
The Spearin doctrine states that an owner who supplies design specifications and drawings impliedly warrants they are adequate for their purpose, and that a contractor who follows them is not liable if they prove defective. It applies more narrowly to design-build, because the design-builder produces the design. It becomes relevant where the owner supplied prescriptive requirements the design-builder had to follow.
One year from substantial completion. During that window the design-builder must return and correct work that does not conform to the contract documents. It is not a warranty and it is not a statute of limitations, and warranty rights can survive past it.
No, there is no separate form. Liquidated damages are handled through the agreement, alongside the time provisions and the mutual waiver of consequential damages. Whether a figure is enforceable depends on it being a reasonable estimate of loss rather than a penalty, and that test varies by state.
