Official Construction Knowledge Center
Fixed-Price vs Cost-Plus Construction Contracts
A practical comparison to help owners understand contract structures. Project decisions should be based on the documented scope, applicable jurisdiction, and the conditions verified for the specific property.
Direct answer
A practical comparison to help owners understand contract structures.
Executive summary
A practical comparison to help owners understand contract structures. Project decisions should be based on the documented scope, applicable jurisdiction, and the conditions verified for the specific property.
Key takeaways
- Define the project objective, constraints, and decision owners before authorizing work.
- Use written scopes, documented assumptions, and qualified project partners to manage risk.
- Confirm site conditions, jurisdictional requirements, and applicable manufacturer requirements early.
- Maintain a clear record of approvals, changes, and closeout information.
Definitions
- Preconstruction
- The planning phase before mobilization that aligns scope, budget, schedule, and constructability.
- Building permit
- Authorization from a local jurisdiction required for many construction, renovation, and roofing scopes before work begins.
Step-by-step process
Step 1
Define the project need and constraints
Step 2
Verify conditions and responsible parties
Step 3
Develop the general contracting scope
Step 4
Coordinate approvals, procurement, and required inspections
Step 5
Document completion and closeout requirements
Checklist
- Document the project objective and success criteria
- Confirm responsible decision-makers and approval path
- Verify existing conditions and applicable requirements
- Review general contracting scope, exclusions, and sequencing
- Maintain records for changes, inspections, and closeout
Supporting detail
Fixed-price contracts provide cost certainty when scope is well defined. Cost-plus can suit evolving scopes but needs strong open-book controls.
Choose the structure that matches design completeness and risk tolerance.
This guidance addresses a common planning question: a practical comparison to help owners understand contract structures. The final approach should be based on the documented conditions and goals of the individual project.
Owners should identify the responsible decision-makers, required approvals, and project constraints early. Written documentation provides a reliable basis for coordinating designers, contractors, occupants, and other stakeholders.
Local requirements, existing conditions, and material availability can affect the final scope and sequence. Confirm project-specific requirements with qualified professionals and the relevant jurisdiction where applicable.
Use routine communication, clear change documentation, and an organized closeout process to maintain visibility from planning through completion. These practices support informed decisions without promising a particular outcome.
Before authorizing general contracting work, confirm the current condition, the intended result, and the parties responsible for decisions. That review gives the project team a common starting point for scope development and field coordination.
Separate observations from assumptions in meeting notes, proposals, and field reports. When a condition cannot be confirmed without investigation, identify it clearly and establish how the team will evaluate it before the affected work proceeds.
A practical project record includes current drawings or sketches, approvals, photographs where useful, and a log of decisions that affect scope. These materials help owners evaluate work consistently as conditions or priorities change.
FAQs
- How should a developer select a general contractor?
- Developers should evaluate relevant project experience, written scope alignment, insurance, references, communication practices, and the proposed approach to schedule, procurement, quality, and closeout. The best fit depends on the project's asset type, risks, and delivery requirements.
- How are change orders handled?
- Change orders document approved changes to scope, cost, schedule, or assumptions in writing before the changed work proceeds whenever the situation allows. Clear change management protects both owner budgets and field clarity. Verbal adjustments create disputes; written authorization keeps the record clean.
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