Who's Liable If a Window Cleaner Is Injured at Your Building?

Updated Jul 2026 · 5 min read

When a window cleaner gets hurt at your building, who pays?

Window cleaning is one of the more hazardous trades performed on commercial property. Crews work at height, handle water and electricity near each other, and rig ropes or lifts against the side of a building you own or manage. Most jobs finish without incident. But when someone falls or gets hurt on your premises, the question of who carries the cost can land on your desk fast, and the answer depends on paperwork you either collected before the job or you did not.

This post walks through how liability actually works when a commercial window cleaner is injured, and what a building owner or property manager should have in place before the crew arrives.

The default rule: their employer, not you

When you hire a properly insured contractor, their own workers' compensation insurance is the first line of coverage for an injured worker. Workers' comp pays an employee's medical bills and lost wages regardless of who was at fault, and in exchange the employee generally cannot sue their employer over the injury. A window cleaning company that carries valid workers' comp keeps its own injured staff inside that system.

That is the outcome you want. The problems start when the contractor has no workers' comp, misclassifies staff as independent contractors to avoid it, or sends a subcontractor you never vetted. If there is no valid policy behind the injured worker, an injured person and their attorney will look for the next available pocket. On a commercial job, that often means the property owner.

How the exposure lands on the building owner

Even when you did nothing wrong, you can be pulled into a claim in a few common ways:

• A premises condition contributed to the injury. If a worker's fall is tied to a rotted anchor point, a missing tie-back bolt, a defective parapet, or a roof hazard you knew about, an injured worker can argue the building itself was unsafe.
• The contractor was uninsured or underinsured. With no workers' comp to absorb the claim, the injured party reaches past the employer toward whoever else was involved, including the owner and the management company.
• You directed the work. The more you control how a contractor does the job, the more a court may treat you as something closer to an employer, which can widen your exposure.

None of this means an owner is automatically on the hook. It means the paperwork you collect beforehand is what keeps a routine job from becoming your insurance company's problem.

The documents that protect you

Before a commercial window cleaning crew touches the glass, gather and actually read the following.

A current certificate of insurance

A certificate of insurance (COI) is a one-page summary of the contractor's active policies. For window cleaning you want to see general liability and workers' compensation listed, with coverage dates that cover your service window. A COI that expired last quarter protects no one.

Additional insured status

Ask to be named as an additional insured on the contractor's general liability policy. This endorsement extends the contractor's coverage to defend and cover you for claims arising out of their work. Being handed a COI that merely lists you as a "certificate holder" is not the same thing. A certificate holder just receives a copy, while an additional insured actually gets coverage.

Proof of workers' compensation

Confirm the workers' comp line on the COI is real and current, and that it covers the people who will physically be on your building. If a company relies heavily on subcontractors, ask whether those subs carry their own workers' comp or are covered under the primary contractor.

A written agreement with an indemnification clause

A service contract that includes a hold-harmless or indemnification clause spells out that the contractor takes responsibility for injuries and damage arising from their work. Whatever you already know about what belongs in a window cleaning contract applies here, and the insurance and indemnity language is the part that matters most when something goes wrong.

High-rise and rope-access work deserves extra scrutiny

Ground-floor storefront cleaning carries ordinary slip-and-fall risk. Suspended or rope-access work on a tall building is a different category. Federal workplace-safety rules in the United States govern how crews anchor, descend, and protect themselves at height, and reputable high-rise cleaners train and document to those standards.

For an owner, the practical takeaways are simple. Ask whether the crew is trained for the access method your building requires. Confirm your rooftop anchor points have been inspected and certified, since those anchors are part of your building, not the contractor's kit. If your building has no certified anchors and a crew improvises, both of you have a problem.

What to do if an injury happens anyway

If a worker is hurt on your property despite the precautions:

1. Get the person medical help first. Nothing else comes before that.
2. Preserve the scene and document it. Photos of the area, equipment, and any relevant building condition protect everyone, including you.
3. Notify your own insurer promptly. Late notice can jeopardize your coverage even on a valid claim.
4. Route the claim to the contractor's carrier. This is where the additional-insured endorsement and the indemnity clause you collected earlier start doing their job.

The short version

The building owner who collects a current COI, secures additional-insured status, confirms real workers' comp, and signs a contract with clear indemnity language has moved almost all of this risk back onto the party doing the work. The owner who lets a crew start on a handshake has quietly volunteered to be the backup insurance policy. The cost of doing it right is a few emails before the job. The cost of skipping it shows up only after someone is already hurt.

Vet insurance and safety documentation the same way every time, for every vendor, and window cleaning stays what it should be: a maintenance line item rather than a liability event.