Owners who have been burned by traditional design-bid-build usually arrive at the same conclusion: the builder needs to be in the room while design decisions are still open. In Texas commercial construction, that conclusion leads to one of two models, Construction Manager at Risk (CMAR) or design-build.
Both put preconstruction expertise to work early. Both can compress schedules. The differences are in who holds which contract, when cost certainty arrives, and how much design control the owner keeps. Those differences decide which model fits a given project.
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How CMAR works
Under CMAR, the owner holds two contracts: one with the architect and one with the construction manager. The construction manager joins during design, provides estimates and constructability input as documents develop, and then commits to a Guaranteed Maximum Price once the design is far enough along to price with confidence.
The owner keeps a direct relationship with the design team and retains final say on design decisions. The construction manager carries cost risk above the GMP, buys out the subcontractor packages, and delivers the work. Savings below the GMP are typically shared or returned to the owner according to the contract.
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How design-build works
Under design-build, the owner holds one contract with a single entity responsible for both design and construction. That entity may be a builder with in-house or contracted design partners, or a joint venture. The owner defines requirements and performance criteria, and the design-build team is accountable for meeting them.
The single contract removes the gap between design intent and construction reality. Constructability, budget, and schedule are resolved inside one team rather than negotiated across two. Cost commitments can arrive earlier, often at a conceptual or schematic stage, because the same organization controls both sides of the equation.
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Where they differ in practice
- Design control. CMAR keeps the architect working directly for you. Design-build places the designer inside the delivery team. Owners with strong design requirements or an existing architect relationship often prefer CMAR.
- Cost certainty. Design-build can offer a price earlier. CMAR offers a GMP later but on more complete documents, which usually means fewer assumptions baked into the number.
- Accountability. Design-build gives you one party to hold responsible for everything. CMAR gives you two, with the construction manager positioned as a collaborator on cost and schedule rather than the author of the design.
- Speed. Both models allow design and preconstruction to overlap. Design-build generally has the edge on total duration because there is no separate GMP negotiation between parties.
- Procurement. Public entities in Texas can use both models, but selection procedures and documentation requirements differ. Private owners have more flexibility and should choose on fit rather than process.
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How Texas owners decide
In our experience, the choice usually comes down to two questions. First, how important is it to keep your own architect and retain direct design authority? If very, CMAR is the natural fit. Second, how much do you value having one accountable party and the earliest possible price? If that outweighs direct design control, design-build is the stronger model.
Project type shapes the answer too. Healthcare and civic work, where user groups and public stakeholders shape design over many rounds, often favors CMAR. Retail rollouts, light industrial, and tenant improvements with clear programs and firm opening dates often favor design-build.
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Either way, get the builder in early
The wrong choice between CMAR and design-build costs less than the choice to keep the builder out until drawings are done. Both models exist because field knowledge changes design outcomes when it arrives early enough to matter.
Formative Structures delivers both models across Texas, principal-led from preconstruction through closeout. If you are weighing them for a specific project, we are glad to walk through the trade-offs with you before you commit to either.
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