DES MOINES, IOWA — When a subcontractor is injured on a job site, is the general contractor automatically liable? In a recent decision shaping general contractor liability, Iowa’s Supreme Court addressed exactly how much contractual authority a general contractor must have over a project to trigger a duty of care for a subcontractor’s work.
In Timothy Kono v. D.R. Horton, Inc., the plaintiff was injured while working on a residential construction project developed by D.R. Horton. The work resulting in the injury was performed by a subcontractor. However, Kono argued that D.R. Horton retained enough control over the project site to be held legally liable for the incident.
The “Retained Control” Argument
To support his claim, the plaintiff pointed to broad language in the construction contract stating that D.R. Horton had the authority to “direct all work” and make “final decisions” in the event of disagreements.
The plaintiff argued that this language granted the developer “complete authority,” thereby triggering Iowa’s retained control exception—a legal doctrine that can impose a duty of care on a general contractor if they control the specific methods of work.
The Court’s Decision: General Oversight vs. Specific Control
Ultimately, the Iowa Supreme Court firmly rejected the worker’s argument. Instead, the Court relied on established Iowa case law. The justices clarified that broad, high-level rights of supervision do not impose a duty of care.
Specifically, how do businesses trigger the retained control exception and establish general contractor liability? Iowa courts require precise control. A general contractor must dictate the exact manner and means of the subcontractor’s work. For instance, general oversight tied to project coordination does not meet the legal standard. Similarly, the ability to stop work or hold final decision-making power falls short of imposing liability.
Applying this framework, the Court reached a definitive conclusion. D.R. Horton’s contractual rights merely amounted to a standard, general supervisory role. Because the developer did not control the specific methods used, the retained control exception did not apply. Consequently, the Court completely shielded the developer from liability.
Key Takeaways for Iowa Contractors
This decision provides vital clarity for the construction industry regarding general contractor liability in Iowa:
-
High-level authority is not enough: General contractors routinely maintain high-level authority to ensure timelines and quality. However, this does not automatically equate to liability for subcontractor injuries.
-
Control of the “manner and means”: Instead, liability hinges strictly on the actual degree of day-to-day control. Businesses must avoid micromanaging how subcontractors execute the work.
-
Contract language matters: Broad contractual language regarding general oversight, standing alone, will not establish the level of control necessary to trigger a duty of care.
Case Reference: Timothy Kono v. D.R. Horton, Inc., No. 23-2092, 2026 Iowa Sup. LEXIS 42 (Iowa Supreme Court, Apr. 10, 2026). You can view the official opinion here.