Choose CM-at-risk (CMAR) when the hospital needs direct control of the architect, intensive preconstruction input, phased or fast-track work, and has an owner team capable of auditing cost and performance. Choose design-build when one entity should be accountable for design and construction, the contracting interface should be simpler, and schedule integration is the priority. Neither method is inherently cheaper or faster: the right choice depends on GMP timing, clinical requirements, specialty-system coordination, procurement law, change exposure, and the owner’s oversight capacity.
What the two delivery methods mean
Delivery method determines who contracts with whom, when the builder joins the project, who controls design decisions, and which party carries defined cost and coordination risks. Those choices are especially consequential for a hospital or medical center, where imaging equipment, medical gases, infection-control barriers, emergency access, live utilities, commissioning, and clinical approvals must be coordinated while the facility may remain operational.
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Construction manager at risk (CMAR)
In CMAR, the owner normally signs separate contracts with the designer and the construction manager. The CM is selected before or early in design and provides preconstruction services while the architect develops the documents. The Massachusetts Office of the Inspector General describes the model this way: “The CM at-risk firm provides preconstruction services and later acts as the general contractor.”
During preconstruction, the CM advises on constructability, site logistics, phasing, estimates, value engineering, schedule, procurement packages, and trade-market conditions. The CM then holds the trade contracts and builds the project. The commercial arrangement is typically cost-plus a fixed fee with a guaranteed maximum price (GMP). The owner and CM negotiate that GMP after schematic design or at another contractually defined design milestone.
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Once the GMP is executed, the CM assumes the construction cost risk above that ceiling, but only for the scope and assumptions covered by the agreement. Owner-directed changes, unresolved design, allowances, exclusions, differing site conditions, escalation provisions, and owner-furnished equipment can remain outside the protection. A GMP therefore provides conditional cost control, not an automatically fixed final price.
Design-build
Design-build places design and construction under one contract with one design-build entity. The owner procures a team that includes the designer and constructor, then manages one principal contractual relationship. The University of Missouri System describes design-build as allowing an early GMP or lump-sum price based on the owner’s criteria and a moderately developed design.
Design and construction can overlap, and the integrated team can make decisions without passing every issue through separate owner-designer and owner-contractor contracts. That advantage depends on a clear owner’s program, clinical and functional requirements, performance standards, room data, equipment criteria, commissioning expectations, and acceptance procedures. If those requirements are incomplete, an early price can create disputes over what the design-build entity was actually required to provide.
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- Agency construction management: the construction manager advises the owner but does not normally hold the trade contracts or take the same at-risk cost position.
- Integrated project delivery (IPD): a multiparty collaborative model with different risk-sharing and incentive arrangements; it is not interchangeable with CMAR or design-build.
- Design-bid-build: design is completed before competitive construction bidding, producing a different sequence and handoff structure.
CMAR vs design-build at a glance
| Decision axis | CM-at-risk | Design-build |
|---|---|---|
| Contract structure | The owner separately contracts with the designer and CM; the CM later builds under a GMP. | The owner contracts with one entity for design and construction. |
| Architect relationship | The owner retains a direct designer relationship and can direct design priorities. | The design team is generally accountable through the design-build entity. |
| Cost certainty | The GMP is negotiated during design, commonly after schematic design; scope, allowances, contingencies, and exclusions require detailed review. | A price can be established earlier from owner criteria and a developing design, but only if requirements are sufficiently defined. |
| Schedule | Early trade input, package bidding, and fast-tracking can proceed while design continues. | An integrated team can overlap design and construction and reduce handoffs. |
| Risk allocation | The CM assumes defined construction cost risk above the GMP; the owner retains risks outside the GMP and unresolved scope. | The design-build entity carries integrated design and construction coordination risk, subject to contract terms and owner-furnished information. |
| Owner oversight | Requires strong owner or independent owner’s project manager (OPM) oversight because the owner has two major contracts and the CM’s interests can diverge from the owner’s. | There are fewer direct contracts, but the owner needs strong program definition, design review, and performance monitoring. |
| Best fit | Large, complex, phased, changing, or schedule-sensitive healthcare work with an experienced owner team. | Owners prioritizing single-point accountability, integrated delivery, and a simpler contracting interface. |
Why hospital projects make the choice harder
Keeping clinical operations running
A medical center may need to maintain emergency access, patient transport, operating rooms, imaging, laboratories, pharmacies, and public circulation throughout construction. CMAR’s early trade involvement can help sequence shutdowns, temporary partitions, infection-control measures, utility tie-ins, and departmental moves. Design-build can also coordinate those items effectively, but the owner must state operational constraints and acceptance criteria in the procurement documents and enforce them during design review.
Specialty systems and equipment
Hospitals contain systems whose interfaces are more consequential than ordinary commercial fit-out: medical gases, nurse call, imaging shielding, operating-room ventilation, sterile processing, emergency power, low-voltage systems, fire protection, elevators, and building automation. CMAR gives the owner a direct designer relationship while the CM advises on trade packaging and constructability. Design-build puts coordination responsibility in one entity, which can reduce handoffs, but the contract must identify who supplies, installs, tests, and warranties owner-furnished clinical equipment and how late vendor data affects the price and schedule.
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Phasing and uncertain scope
Renovation, additions, and campus work often reveal conditions only after selective demolition. CMAR can package early demolition, enabling work, or utilities while later design packages mature. The trade-off is that the owner accepts a later GMP and must manage evolving scope. Design-build can price and advance work earlier, but the owner has less leverage to redirect design after award without triggering change costs under the integrated contract.
Cost certainty: what a GMP does and does not promise
Hospitals often ask which method gives the most certain price. The accurate answer is conditional. In CMAR, the GMP is usually negotiated after schematic design, so the owner receives meaningful price certainty later than with a design-build proposal based on owner criteria and a moderately developed design. Earlier does not mean more reliable if the criteria omit clinical functions, equipment interfaces, infection-control obligations, commissioning, or phasing constraints.
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- Defined scope: confirm drawings, specifications, room lists, equipment responsibilities, site work, testing, and commissioning included at the GMP date.
- Allowances: identify each allowance, its quantity basis, markup treatment, and the process for converting it to an actual cost.
- Contingencies: separate owner contingency, design contingency, and contractor contingency; state who controls each and when unused amounts return to the owner.
- Exclusions: list permits, utility-company charges, hazardous-material abatement, escalation, temporary facilities, and owner-furnished equipment that are not included.
- Assumptions: document working hours, access, shutdown windows, site conditions, labor availability, and escalation dates.
- Fee and savings: define the fixed fee, general conditions, subcontractor buyout treatment, audit rights, and whether savings are shared or returned.
A lump-sum design-build price has the same need for scope discipline. The owner’s criteria should identify clinical performance, room environmental requirements, durability, maintainability, energy targets, regulatory obligations, and measurable acceptance tests. Otherwise, apparent price certainty can be replaced by design clarifications and change orders.
Schedule and fast-track delivery
CMAR supports fast-tracking by allowing early bid packages, such as demolition, foundations, structural steel, or major equipment procurement, while later design packages continue. The CM’s estimating and trade-market feedback can expose long-lead items before the entire design is complete. This approach is useful when a hospital has a fixed opening date or must coordinate work around patient care.
Design-build can overlap design and construction within one integrated team and reduce the time spent resolving designer-contractor responsibility disputes. It is not automatically faster: owner approvals, clinical sign-off, permitting, equipment decisions, and incomplete criteria can become the critical path. Require a baseline schedule showing design packages, owner review durations, permit milestones, procurement dates, commissioning, training, and occupancy approvals.
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Design control and accountability
When CMAR gives the owner an advantage
With separate designer and CM contracts, the hospital can retain direct authority over clinical planning, user-group decisions, standards, and architectural priorities. The CM participates early without becoming the sole gatekeeper of design. This arrangement is valuable when the owner has an experienced facilities department, a strong clinical planning process, and an OPM able to reconcile cost, quality, and schedule recommendations.
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Design-build creates one principal point of accountability for coordinating design with construction means, methods, procurement, and sequencing. The owner can focus on outcomes rather than managing separate designer-contractor interfaces. That benefit is strongest when the owner can write a precise program and evaluate the design-builder’s proposed approach, key personnel, specialty partners, quality controls, and commissioning plan.
Risk, changes, and claims
CMAR can reduce avoidable changes because the CM reviews constructability and trade pricing while design develops. It does not eliminate changes caused by owner decisions, incomplete clinical requirements, concealed conditions, regulatory revisions, or equipment substitutions. Because the CM is both adviser and eventual constructor, the owner should require open-book estimates, independent estimate checks, transparent subcontractor procurement, and a documented process for resolving disagreements over scope and price.
Design-build can reduce disputes about whether a problem is design or construction because one entity is responsible for both. The contract still needs clear standards for design liability, professional services, owner review, delegated design, substitutions, changes in law, site information, and design-builder compensation. A single contract simplifies the interface; it does not remove the owner’s responsibility to provide accurate information and timely decisions.
Owner capability and procurement rules
Procurement law is jurisdiction-specific. Massachusetts Office of the Inspector General guidance, Infrastructure Ontario guidance, and University of Missouri policy are authoritative examples of particular frameworks, not a single national rule. Confirm whether the hospital is public, quasi-public, or private; whether qualifications-based selection or price competition is required; what licensing and bonding rules apply; and whether the jurisdiction permits CMAR, design-build, or negotiated GMP amendments for the proposed project.
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CMAR generally demands more owner-side administration because the hospital manages separate designer and CM contracts, reviews estimates, approves packages, and monitors the CM’s competing interests. In a Massachusetts framework, the OIG requires an independent OPM, reflecting the need for oversight. Design-build reduces the number of prime contracts but increases the importance of the owner’s criteria, proposal evaluation, design reviews, and performance verification.
A practical decision process
- Define the project conditions. Record whether the work is new construction, occupied renovation, a phased campus program, or a single building; identify the opening date, shutdown constraints, long-lead equipment, and known site risks.
- Measure owner readiness. Confirm the availability of clinical planners, facilities staff, finance, legal counsel, infection-control specialists, and an OPM or equivalent independent reviewer.
- Set the required design control. If the owner must direct the architect closely and expects frequent clinical changes, CMAR may provide the better governance structure. If outcome requirements can be stated clearly and the owner prefers one accountable entity, design-build may fit.
- Choose the price milestone. Decide whether the project can tolerate a GMP negotiated after schematic design or needs an early price based on owner criteria. In either case, identify contingencies, allowances, exclusions, and escalation treatment before comparing proposals.
- Test schedule integration. Require each shortlisted team to show package release dates, procurement logic, shutdown planning, commissioning, and recovery actions for delayed decisions or permits.
- Evaluate specialty capability. Score demonstrated healthcare experience in imaging, operating rooms, infection control, medical gases, emergency power, commissioning, and occupied-campus logistics—not merely general building volume.
- Model change exposure. List likely changes from user groups, equipment vendors, regulations, surveys, and concealed conditions. Decide which party owns each risk and how the contract prices it.
- Document the selection rationale. Preserve the evaluation matrix, assumptions, clarifications, and approval record so the chosen method can be defended to boards, auditors, regulators, or public stakeholders.
How to set up a CMAR project
- Issue a qualifications-based solicitation that explains the hospital program, required preconstruction services, healthcare experience, staffing, safety and infection-control expectations, and proposed fee structure.
- Select the CM early enough for meaningful site, phasing, constructability, and market input; define the preconstruction scope and compensation separately from construction compensation.
- Establish estimate milestones, independent estimate reviews, value-engineering rules, design-package dates, trade-procurement procedures, and open-book reporting.
- Negotiate the GMP only after confirming the covered drawings, specifications, allowances, contingencies, exclusions, assumptions, and owner-furnished items.
- Execute a construction amendment that states the CM’s cost risk, savings treatment, audit rights, subcontractor buyout requirements, change process, schedule obligations, and termination remedies.
- Monitor performance through monthly cost reports, schedule updates, risk registers, procurement logs, submittal status, infection-control inspections, commissioning records, and independent OPM reviews.
How to set up a design-build project
- Prepare an owner’s program covering clinical functions, room data, adjacencies, capacity, codes, infection prevention, sustainability, security, resilience, maintainability, commissioning, training, and acceptance tests.
- Choose a procurement format permitted in the jurisdiction and define how teams will be shortlisted, interviewed, scored, and paid for proposal development.
- Require a design-management plan showing user-group engagement, design reviews, delegated design, specialty consultants, equipment coordination, BIM or model exchange, and document control.
- Require a price proposal that identifies assumptions, allowances, contingencies, exclusions, escalation, owner-furnished equipment, and the date and design maturity supporting the price.
- Use independent technical and cost reviewers to test the proposal against the owner’s criteria before award and at defined design milestones.
- Make payment, commissioning, substantial completion, occupancy, training, correction of deficiencies, warranties, and post-occupancy obligations measurable in the contract.
Common mistakes and how to avoid them
Treating the GMP as a fixed-price guarantee
A GMP can exclude major scope or rely on optimistic allowances. Require a line-by-line basis of estimate and state how unknowns are handled.
Choosing design-build before defining the clinical program
An underspecified program shifts unresolved decisions into design development, where changes are more expensive. Complete room data, performance criteria, and acceptance tests before procurement.
Assuming early contractor involvement eliminates owner oversight
CMAR still requires independent review of estimates and buyout. Design-build still requires disciplined design review and verification. Fewer contracts do not mean fewer owner decisions.
Ignoring occupied-campus logistics
Bid documents should address infection-control risk assessments, noise and vibration limits, temporary routes, utility shutdown approvals, emergency access, fire-watch procedures, and communication with clinical departments.
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Using a generic healthcare experience requirement
Ask for comparable evidence: occupied renovations, imaging or operating-room projects, commissioning outcomes, safety performance, claims history, key-person availability, and the proposed specialty subcontractor team.
What the available healthcare evidence shows
Published evidence does not establish a universal cost or schedule winner. Bilbo, Bigelow, Escamilla, and Lockwood’s peer-reviewed comparative case study examined two completed healthcare facilities and collected cost per square foot, schedule changes, requests for information, change-cost percentage, and interview data. It demonstrates that delivery methods can be evaluated empirically, but it compares CMAR with integrated project delivery rather than directly with design-build, and its two-facility sample cannot support a hospital-wide rule.
The National Academies of Sciences, Engineering, and Medicine published the 53-page Competition Requirements of the Design/Build, Construction Manager at Risk, and Public-Private Partnership Contracts—Seven Case Studies in 2012. The report examines seven projects and is useful for understanding competition requirements and procurement structure, not for claiming that one method always produces a particular savings percentage.
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Occupied hospital expansion with uncertain phasing
A hospital adding beds beside an active emergency department may favor CMAR if the owner needs the architect directly, expects enabling packages before final design, and has an OPM capable of reviewing GMP assumptions. The contract should isolate shutdowns, temporary works, infection-control measures, and equipment interfaces so the GMP does not conceal unresolved risk.
New medical center with a mature program
A health system with completed room data, performance standards, equipment criteria, and a firm opening date may favor design-build. The solicitation should make acceptance objective and require the team to prove how design, permitting, procurement, commissioning, and training will meet the date.
Owner with limited capital-project staff
Design-build may reduce the number of contractual interfaces, but it is not a substitute for technical representation. If the owner cannot define requirements or review performance, appoint an independent adviser before selecting either method.
Bottom line
CMAR is usually the stronger choice for a complex, phased, occupied, or evolving healthcare project when the owner values direct architect control and can manage a later GMP with independent oversight. Design-build is usually the stronger choice when the owner can define clinical and performance requirements clearly and wants one entity responsible for integrating design, procurement, construction, and schedule. Compare the methods using the same scope, risk register, price assumptions, schedule milestones, and acceptance criteria; then select the structure that matches the hospital’s actual capability rather than relying on a blanket claim that one method is always faster or cheaper.
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