Design-Build and IPD Agreements (A141, A133, A195/B195)

How AIA documents support alternative delivery methods beyond traditional Design-Bid-Build, including the A141 Design-Build agreement, A133 CM-as-Constructor agreement with GMP, and the A195/B195 Integrated Project Delivery agreements, along with the risk allocation, compensation structures, and collaboration levels each creates.

ARE · Practice Management

Overview

Design-Bid-Build dominated American construction for over a century. Then owners started asking a different question: what if the people designing the building and the people building it worked together from the start?

That question produced two major shifts in project delivery, and the AIA created contract documents for both.

The first shift was Design-Build. Under AIA A141, one entity takes responsibility for both design and construction. The owner writes a set of criteria, and the design-builder delivers a building that meets those criteria. One contract. One point of accountability. Faster delivery because design and construction can overlap.

The second shift was Integrated Project Delivery. IPD goes further. Instead of just combining design and construction under one roof, IPD aligns the incentives of the owner, architect, and contractor through shared risk and shared reward. AIA created A195 for the owner-contractor IPD relationship, B195 for the owner-architect IPD relationship, and A295 as the general conditions binding them together. For teams ready for the deepest level of collaboration, C195 creates a single purpose entity where all parties become members of an LLC formed to deliver the project.

Sitting between these two extremes is A133, the CM-as-Constructor agreement. The construction manager provides preconstruction advisory services and then assumes financial responsibility for construction through a guaranteed maximum price. It is not pure Design-Build, and it is not IPD. But it moves the constructor into the process earlier than DBB ever allows.

For the ARE, you need to know which agreement fits which delivery method, how risk shifts across them, and why the level of collaboration matters for project outcomes.

Essential

Each alternative delivery method has its own set of AIA agreements. These documents define who carries risk, how money flows, and what level of collaboration the parties commit to. On the ARE, you will face questions that test whether you can match the right agreement to the right situation and predict how risk shifts when the delivery method changes. ## A141: The Design-Build Agreement AIA A141 is the agreement between the owner and the design-builder. It replaced the older A191 form. The current edition (A141-2014, with a 2024 update) consists of the agreement itself plus three exhibits: Exhibit A (Design-Build Amendment), Exhibit B (Insurance and Bonds), and Exhibit C (Sustainable Projects). Here is how a Design-Build project flows under A141. The owner prepares a set of Owner's Criteria establishing project requirements. The design-builder reviews those criteria, develops a preliminary design, and then submits a proposal for the Contract Sum.

Professional

Consider a mid-size firm that has operated exclusively within Design-Bid-Build for decades. The firm wins a commission for a new municipal library, but the owner wants to explore alternative delivery. The architect needs to understand which agreements apply, what the firm's role becomes, and how its risk exposure changes. ## Scenario 1: Architect as Design-Build Subconsultant A general contractor approaches the firm to serve as the architect under a Design-Build project using AIA A141. The contractor is the design-builder. The firm would sign B143, the agreement between the design-builder and architect. Under B143, the architect's obligation is to perform within the standard of care. That is familiar territory. But the design-builder's obligation to the owner under A141 is a warranty of all work, including design. If the architect's design meets the standard of care but still does not satisfy the owner's criteria, the design-builder eats the loss.

TLDR

A141 (Design-Build): Owner contracts with one entity for design and construction. Design-builder warrants all work including design. Does not use A201. Three payment options: stipulated sum, cost-plus, cost-plus with GMP.
A133 (CM-as-Constructor): CM provides preconstruction services, then submits a GMP. If accepted, CM takes financial responsibility for construction. Uses A201 as general conditions. A134 is the same structure without the GMP.
A195/B195 (IPD Level 2): Separate owner-contractor (A195) and owner-architect (B195) agreements, both incorporating A295 general conditions. Six project phases. Contractor provides GMP.
C191 (IPD Level 3): One multi-party agreement signed by owner, architect, and contractor. Cost-of-work compensation with goal-based incentives. Two management tiers.
C195 (IPD Level 4 - SPE): Participants form an LLC to design and build the project. Deepest collaboration. Dissolved when complete. Joint venture liability risk.
Warranty vs. Standard of Care: A141 = warranty on design-builder. B143 = standard of care on architect under design-builder. EJCDC D-700 and DBIA 535 = standard of care on design-builder. Know the difference.
Spearin Doctrine shifts in Design-Build: Owner's implied warranty of constructability weakens because the design-builder creates its own documents.
Flow-down risk: Design-build subcontractors must check whether the prime contract's warranty obligations flow down to them, potentially voiding professional liability insurance coverage.

ELI5

Think of building a house using three different approaches. The Old Way (Design-Bid-Build): You hire an architect to draw up complete plans. Then you find a builder through competitive bids. The architect and builder do not know each other. They work in sequence. First the plans, then the building. Simple, but slow. And the builder might look at the plans and say, "This is going to be really hard to build. I wish someone had asked me earlier." The One-Stop Shop (Design-Build with A141): Instead of hiring an architect and builder separately, you hire one company to do both. You tell them what you want (the Owner's Criteria), and they figure out how to design and build it. Faster, because design and construction can overlap. But you give up some control over the design details. Here is the catch: this one company guarantees the result.

AREPractice Management

Design-Build and IPD Agreements (A141, A133, A195/B195)

2 min read264 words

Beyond Traditional Delivery: The Agreements That Changed How Buildings Get Built

That question produced two major shifts in project delivery, and the AIA created contract documents for both.

For the ARE, you need to know which agreement fits which delivery method, how risk shifts across them, and why the level of collaboration matters for project outcomes.

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