Understanding third-party liability on construction sites

Construction Accident - August 31, 2026 by Horwitz, Horwitz & Associates

Third-party liability on a construction site means that someone other than your employer, like a general contractor, subcontractor, or equipment manufacturer, may be held responsible for your injury. That matters, because it can open the door to compensation beyond what workers’ compensation pays.

Construction sites are dangerous, with countless hazards and just as many parties who might share the blame. If a construction accident has left you hurt, a Chicago construction injury lawyer with Horwitz, Horwitz & Associates can help you understand your situation and protect your right to pursue compensation.

Why can’t you just sue your employer after a construction injury?

In most cases, you can’t sue your employer directly, and that comes from the Illinois Workers’ Compensation Act itself. Under the Act, workers’ compensation is generally the exclusive remedy against a covered employer for a workplace injury. That usually blocks an ordinary personal injury lawsuit against your employer, but it doesn’t stop you from pursuing a third party who’s legally responsible.

Workers’ compensation is generally a no-fault system. That means you don’t ordinarily have to prove your employer was negligent to receive benefits for a compensable work injury. Depending on the injury, it can cover necessary medical care and pay disability benefits. Temporary total disability benefits are generally two-thirds of your average weekly wage, subject to limits set by law.

Who counts as a “third party” on a construction site?

A third party is anyone involved in the project who isn’t your employer or a coworker. On a busy site, that can include subcontractors, other companies working alongside you, the property owner, or the manufacturer of a piece of equipment.

Why can a third-party claim provide more compensation than workers’ comp?

A third-party claim can cover losses workers’ compensation doesn’t. Not every third-party claim is worth more, but many are.

Workers’ compensation was never designed to make you whole. It generally covers medical care and a portion of your lost wages. A third-party claim is different. When you pursue the at-fault party directly, you can seek the full range of compensatory damages available under Illinois tort law, including your full lost wages and non-economic losses like pain and suffering.

There’s a trade-off to understand, though. Unlike no-fault workers’ comp, a third-party case can involve questions of fault. Under Illinois’s modified comparative fault rule, your damages can be reduced by your share of the blame, and you can’t recover at all if you’re found more than 50% responsible.

When can a general contractor be held liable?

A general contractor isn’t automatically responsible for every injury on a site, even though it runs the overall project. Under Illinois law, liability usually depends on how much control the contractor kept over the work that led to the injury.

A general contractor might be liable when it kept real control over how the work was performed and didn’t exercise that control with reasonable care. Just having the right to inspect the work, stop the job, or require crews to follow safety rules usually isn’t enough by itself. Things like who actually supervised the work, the safety procedures in place, and what the contract put the contractor in charge of can all matter.

A general contractor may also be liable in other situations, like when it controls property or site conditions that create an unreasonable risk of harm. In the end, it comes down to the contractor’s role and the circumstances of the accident.

What if defective equipment caused your injury?

If defective machinery, tools, scaffolding, or safety equipment contributed to your accident, the manufacturer or another company in the product’s supply chain may be liable. You don’t necessarily have to prove the manufacturer knew the product was dangerous. Depending on the facts, a claim might involve a manufacturing defect, a design defect, inadequate warnings, or negligence.

Maintenance and modifications matter too. If poor upkeep, bad repairs, or changes made after the product left the manufacturer contributed to the failure, responsibility may shift to other parties or be shared among several. Keep in mind that even when your employer played a role, workers’ compensation exclusivity usually means you can’t simply sue your employer in a personal injury case, though the employer’s conduct can still matter to causation and the third-party claim.

Can you pursue workers’ comp and a third-party claim at the same time?

Yes, and it’s often the smartest approach. When a third party caused your injury, Illinois law lets you pursue a third-party claim alongside your workers’ compensation claim.

That lets you use workers’ comp for fast access to medical care and wage replacement while you’re out, and pursue the responsible third party, whether a company, manufacturer, or property owner, for the losses workers’ comp doesn’t cover. One thing to keep in mind: your employer or its workers’ compensation carrier may have reimbursement or lien rights against a third-party recovery for the benefits it already paid. The Act sets out specific rules for how that works.

One injury, every avenue to compensation

If you’ve been hurt on a construction site, you’re likely in pain and unsure of the best path forward. A lot of hardworking Illinois workers worry that filing a claim makes them “the type of person who sues,” or that accepting workers’ comp means giving up any other options. Neither is true. Holding a negligent company accountable is your right.

At Horwitz, Horwitz & Associates, we build cases by chasing down every possible source of compensation. If you’re not sure what to do next, call us at (800) 985-1819 or reach out online to schedule a free case consultation and learn about your options.