A recent Iowa Supreme Court decision provides an important reminder that a general contractor’s involvement in a construction project does not, by itself, make the contractor liable for injuries suffered by a subcontractor’s employee.
In D.R. Horton, Inc. v. Classic Builders, No. 23-2092 (Iowa Supreme Court 2026), a subcontractor’s employee suffered catastrophic physical and emotional injuries after being buried in a trench collapse. The employee recovered workers’ compensation benefits and also obtained damages from several co-employees whom he sued. He then pursued a negligence claim against the project’s general contractor, D.R. Horton.
A jury found D.R. Horton liable and awarded more than $20 million in compensatory and punitive damages. On appeal, however, the Iowa Supreme Court reversed. The court concluded that D.R. Horton did not owe the injured worker a duty of care under the circumstances and that the case should never have been submitted to the jury. D.R. Horton was therefore entitled to judgment notwithstanding the verdict.
The decision is significant for general contractors because it reinforces Iowa’s “no-duty baseline”: ordinarily, a general contractor does not owe a duty of care to an employee of an independent subcontractor for injuries arising from the subcontractor’s work.
The Trench Collapse
The injured worker was employed by Royal Plumbing, a plumbing subcontractor on the project. He was working in a trench approximately 10 feet deep that had neither conventional shoring nor a trench box to protect against a collapse.
Instead, the trench was protected through “benching,” a method in which the sides of the excavation are cut into a series of steps.
The benching was problematic for two reasons. First, the soil at the excavation was Type C soil, for which OSHA regulations prohibited the use of benching as the protective system employed here. Second, even apart from the soil classification, the trench had reportedly been benched improperly. The benches were too narrow and too steep to provide adequate protection against a cave-in.
The worker testified that he recognized the trench was unsafe. Nevertheless, he continued working after being instructed to do so by his supervisors. He explained that he was a new employee and felt obligated to follow his supervisors’ directions.
The trench ultimately collapsed, burying him and causing serious physical and emotional injuries that required multiple surgeries.
The Contractual Allocation of Safety Responsibilities
The Iowa Supreme Court began its analysis by examining the agreements between D.R. Horton and Royal Plumbing.
The master agreement required Royal Plumbing to “fully comply with and implement” applicable governmental laws and safety requirements, including OSHA standards.
The project-specific scope of work likewise required Royal Plumbing to use OSHA-compliant trench protection when necessary during installation of the water and sewer laterals.
At the same time, the agreement gave D.R. Horton certain broad supervisory rights. It required regular supervision by the general contractor’s job superintendent and provided that D.R. Horton would retain authority to direct the work and make final decisions.
Those provisions became central to the worker’s argument that D.R. Horton had retained sufficient control over Royal Plumbing’s operations to owe him a duty of care.
The project also had a D.R. Horton corporate safety manual, the “Safety & Health Program—North Region.” The manual described responsibilities of D.R. Horton’s safety personnel, including a regulatory compliance administrator charged with enforcing safety requirements such as OSHA rules on jobsites.
The worker relied heavily on these safety provisions at trial.
The Supreme Court, however, distinguished between general supervisory authority and control over the operative details of the particular work that caused the injury.
Iowa’s “No-Duty Baseline”
The court began with a longstanding Iowa principle: a general contractor ordinarily does not owe a duty of care to an employee of an independent subcontractor.
The reason is straightforward. The subcontractor typically has specialized expertise and control over the day-to-day performance of its work. It is therefore ordinarily in the best position to identify and eliminate risks to its own employees.
Here, Royal Plumbing performed the trenching, failed to provide the required protection, and directed its employee to enter the trench. D.R. Horton was not present when the accident occurred and did not learn of the accident until approximately two months later.
The court emphasized that a general contractor’s passive supervisory role does not ordinarily make it responsible for the details of work that it has hired a subcontractor to perform.
This is the “no-duty baseline” identified by the court. Once that baseline applies, the injured employee must establish an exception before the general contractor can be held liable.
The worker relied on two exceptions: retained control and peculiar risk.
The court rejected both.
The Retained-Control Exception
A general contractor can owe a duty of care when it retains control over the operative details of the subcontractor’s work.
The exception is narrow. The critical question is the degree of control retained over the subcontractor’s day-to-day operations.
Importantly, a general contractor may retain control through contractual language or through its conduct in the field. But neither occurred here to the extent necessary to impose a duty.
Broad Contractual Rights Were Not Enough
The worker argued that D.R. Horton had retained control because the contract stated that D.R. Horton had authority to “direct all work” and make “all final decisions.”
The Supreme Court rejected that argument.
A general contractor does not assume a duty merely because its contract gives it broad authority to supervise a subcontractor, inspect work, require compliance with the contract, or resolve disagreements.
The contract must give the general contractor control over the specific portion of the work that caused the injury.
That distinction was decisive.
D.R. Horton’s contractual rights were general in nature. They did not give the company control over the method, manner, or operative details of Royal Plumbing’s trenching operations.
Royal Plumbing, rather than D.R. Horton, controlled how the trench was excavated and how its employee performed the work inside the trench.
As the court explained, retaining a right to inspect work or make suggestions is different from retaining the right to control the manner in which the work is actually performed.
The Safety Manual Did Not Change the Result
The worker also relied on D.R. Horton’s corporate safety manual and the responsibilities assigned to D.R. Horton’s safety personnel.
The court was not persuaded.
The existence of a safety program, safety manual, or safety director, standing alone, does not create a duty of care under the retained-control doctrine.
There was an additional problem: the safety manual was not incorporated into the contract between D.R. Horton and Royal Plumbing.
Thus, although D.R. Horton had corporate safety policies and procedures, those policies did not establish that D.R. Horton had contractually assumed responsibility for the particular trenching operations at issue.
The court summarized its conclusion by finding that D.R. Horton had not retained control over the operative details of Royal Plumbing’s work through the contract. Its general rights to direct or supervise the subcontractor lacked the specificity necessary to impose responsibility for the manner in which Royal Plumbing performed the trenching.
What About D.R. Horton’s Conduct at the Jobsite?
The analysis did not end with the written contracts.
Even when a contract does not impose a duty, a general contractor can potentially assume responsibility through its actual conduct. If the general contractor exercises sufficient control over the subcontractor’s work in the field, the retained-control exception may apply.
The Supreme Court concluded that this did not happen here.
The evidence showed that D.R. Horton did not participate in determining how Royal Plumbing performed the excavation. Royal Plumbing alone dug the trench and directed the employee’s work inside it.
The only specific example of D.R. Horton exercising control identified by the worker was an occasion when a D.R. Horton supervisor told Royal Plumbing that its workers were not wearing hard hats.
The court concluded that this isolated safety-related intervention was insufficient to establish retained control over Royal Plumbing’s excavation work.
In other words, pointing out a safety violation is not the same as taking control of the subcontractor’s operative methods.
The distinction is important. A general contractor may monitor compliance with safety requirements without thereby becoming legally responsible for every safety decision made by an independent subcontractor.
The Peculiar-Risk Exception
The worker also argued that trench excavation presented a “peculiar risk” that independently imposed a duty on D.R. Horton.
The court rejected that argument as well.
Iowa applies the peculiar-risk exception sparingly. The work must involve an exceptional or unusual danger—something beyond the ordinary risks associated with routine construction activity.
The court concluded that ordinary residential excavation does not constitute a peculiar risk as a matter of law.
That conclusion was reinforced by the circumstances of this particular accident. The danger of a trench collapse could have been substantially reduced through ordinary safety precautions, including proper shoring or use of a trench box.
The court reasoned that the precautions necessary to prevent a trench cave-in are not technically complex. They are established safety measures that have long been used in excavation work.
The fact that the subcontractor failed to follow OSHA requirements did not transform the work itself into a peculiar risk that shifted responsibility to the general contractor.
As a result, the peculiar-risk exception did not create a duty of care.
Why the Case Matters to General Contractors
The D.R. Horton decision illustrates the importance of clearly allocating responsibility between a general contractor and its subcontractors.
Well-drafted construction agreements should expressly identify which party is responsible for performing particular work and for complying with applicable safety requirements. In this case, the contract placed responsibility for OSHA-compliant trench protection on Royal Plumbing.
That allocation helped D.R. Horton establish that it had not retained control over the operative details of the trenching work.
But the decision also demonstrates that contract language is not the end of the analysis.
Courts can look beyond the four corners of the contract to determine what a general contractor actually did at the jobsite. A contractor that goes beyond general oversight and begins directing the method, manner, or operative details of a subcontractor’s work may potentially assume a duty that the contract itself did not impose.
That makes the distinction between supervision and control particularly important.
A general contractor can generally retain the right to inspect work, monitor contractual compliance, identify safety violations, and exercise general supervisory authority without automatically becoming responsible for the subcontractor’s employees. But when the contractor actually takes control of the specific work creating the danger, the legal analysis can change.
Practical Takeaways
The decision offers several lessons for general contractors and construction companies:
Clearly assign safety responsibilities to the subcontractor. Contracts should expressly require subcontractors to comply with OSHA and other applicable safety requirements and should identify responsibility for safety measures associated with the subcontractor’s work.
Avoid vague or conflicting contractual provisions. General rights to “direct all work” or make “final decisions” do not necessarily create liability, but contracts should clearly distinguish general project oversight from control over the operative details of subcontracted work.
Understand the significance of actual conduct. Contractual protections can be undermined if the general contractor’s personnel begin directing how a subcontractor performs its work.
Maintain a distinction between inspection and control. Checking whether work complies with the contract or identifying an obvious safety violation is different from directing the subcontractor’s means and methods.
Use safety manuals carefully. Corporate safety programs are important, but companies should understand how those programs interact with their contracts and jobsite practices. A safety manual alone does not necessarily create a tort duty, particularly when it has not been incorporated into the subcontract.
Document the allocation of responsibility. Clear records showing that the subcontractor was responsible for its own means, methods, personnel, and safety practices can be important if an accident later results in litigation.
The Bottom Line
The facts surrounding this accident were undeniably serious. A worker entered a 10-foot trench that lacked appropriate protective measures, despite recognizing that the excavation was unsafe. The resulting collapse caused devastating injuries.
But the Iowa Supreme Court’s decision demonstrates that the seriousness of an injury does not answer the threshold legal question of whether a general contractor owed the injured worker a duty of care.
Under Iowa law, the starting point is that a general contractor ordinarily does not owe a duty to an employee of an independent subcontractor for injuries arising from the subcontractor’s work.
To overcome that rule, the employee must establish an applicable exception.
Here, the court found that D.R. Horton did not retain control over the operative details of Royal Plumbing’s trenching work, either through its contract or through its conduct at the jobsite. The court also concluded that residential excavation did not present the type of extraordinary danger necessary to invoke the peculiar-risk exception.
Accordingly, the negligence claim failed as a matter of law. Because the district court should have dismissed the claim rather than submitting it to the jury, the Iowa Supreme Court reversed the more-than-$20 million verdict and held that D.R. Horton was entitled to judgment notwithstanding the verdict.
For general contractors, the message is clear: carefully drafted subcontract agreements matter, but so does what happens in the field. A contractor can protect itself by clearly assigning responsibility for a subcontractor’s work and safety obligations, but it must also be careful not to assume operational control over the very work that creates the risk of injury.
D.R. Horton, Inc. v. Classic Builders, No. 23-2092 (Iowa Supreme Court 2026), is therefore an important reminder that the difference between general oversight and retained operational control can determine whether a general contractor faces no liability at all—or a multimillion-dollar negligence claim.
For more information click HERE.