On-Site vs Off-Site Coverage in Construction: What GCs Miss

TL;DR: On-site losses fall under the project's CGL and builder's risk; off-site losses frequently land in gaps because standard builder's risk policies narrowly define "project site" and exclude off-site storage, in-transit damage, and off-site fabrication. GCs should confirm inland marine coverage for transit, scheduled off-premises coverage for storage yards and fabrication shops, and installation floaters for custom precast, steel, or millwork before materials leave the supplier.

When a construction claim happens, one of the first questions the insurance adjuster asks is "where did it happen?" That sounds obvious, but the legal and coverage consequences of on-site vs off-site are enormous, and most general contractors don't realize how different the two scenarios are until a claim forces them to find out.

This guide walks through the difference between on-site and off-site coverage in construction, the specific gaps where each type of loss can fall through, and what GCs should verify from every subcontractor to make sure neither scenario leaves them exposed.

The Basic Distinction

In construction insurance, "on-site" generally means the defined project premises where work is actively being performed. "Off-site" means anywhere else: the sub's storage yard, a fabrication shop, a transportation route between locations, a supplier's warehouse, or a parking lot near the job site.

This matters because different insurance policies apply in different locations:

• On-site losses are typically covered by the project's CGL program (whether it's each contractor's individual policy or an OCIP/CCIP wrap-up), plus builder's risk for property damage to the work in progress.
• Off-site losses can fall into gaps: off-site storage may not be covered by builder's risk, transit damage may require inland marine insurance, and injuries occurring off-site may trigger different coverage analyses than injuries on-site.

When a loss happens and the parties argue about "where," they're really arguing about "whose insurance pays."

Builder's Risk and the On-Site vs Off-Site Problem

Builder's risk insurance covers property damage to the work in progress, materials, and sometimes fixtures and equipment. Standard builder's risk policies cover property while it's at the project site, but many policies have narrow definitions of "project site" and exclude or sub-limit losses that occur off-site.

Common gaps:

Materials Stored Off-Site

If the sub is storing materials at their own yard, a bonded warehouse, or a supplier's facility before delivery, those materials may not be covered by the project builder's risk policy. Some builder's risk policies offer off-site storage coverage (sometimes called "off-premises" coverage), but it's often capped at a low sub-limit and requires the policyholder to specifically schedule the storage location.

Materials in Transit

Transit losses (damage to materials while being trucked from a warehouse to the job site) are often excluded from both builder's risk and the sub's CGL. They require a separate coverage: inland marine insurance. GCs assume transit is covered, and sometimes it isn't.

Off-Site Fabrication

Custom fabrication done off-site at a sub's shop (precast concrete, structural steel, millwork) before delivery to the site is a major gap. Builder's risk may not cover the fabricated work until it arrives at the job site. The sub's CGL may not cover first-party damage to their own product. A dedicated installation floater or project-specific fabrication coverage may be needed.

Staging Yards

Many projects use off-site staging yards for equipment and materials. Whether these yards are covered by builder's risk depends on the policy's definition of "project site." GCs should clarify with the insurance broker whether staging yards are explicitly included.

On-Site Labor Injuries vs Off-Site Labor Injuries

Workers' Compensation is less location-sensitive than property insurance because it generally follows the employee wherever they're performing job-related work. A sub's employee injured in the company truck between the yard and the job site is typically covered by WC. A sub's employee injured at the sub's own shop is also covered.

However, liability coverage is more location-sensitive. A few scenarios where off-site liability gets tricky:

A Sub's Employee Injured at a Third-Party Location

If the sub's crew is picking up materials at a supplier's warehouse and an employee gets injured due to unsafe conditions, the employee's WC covers medical bills and lost wages. The supplier may be liable for the unsafe conditions, but the sub's CGL may or may not step in depending on the circumstances. If the sub's employee sues the supplier and the supplier counter-sues your sub's CGL, you can end up in a multi-party liability mess.

A Sub's Truck Causes an Accident En Route

Auto liability on the sub's Commercial Auto policy should respond, but many GCs don't verify whether the sub carries "Any Auto" auto coverage or only "Hired and Non-Owned," and the narrower forms can leave gaps when owned work trucks are involved.

Work-Related Injury at a Sub's Own Yard

Generally covered by the sub's WC. If the sub has no WC or the policy is lapsed (a real scenario in monopolistic states or with uninsured subs), the injured worker may try to reach the GC as a statutory employer.

Common Coverage Gaps GCs Miss

Based on real claim scenarios, here are the gaps that cause the most expensive disputes:

1. Fabricated Work Damaged Before Arrival

Custom cabinetry, prefab concrete, structural steel, architectural glass. All valuable, all vulnerable, and all potentially not covered if the loss happens before the work hits the project site.

2. Equipment Rented Off-Site

Cranes, lifts, and other major equipment rented to the project but stored off-site during downtime can fall into a coverage gap. Rental companies typically require the renter to insure the equipment, but the project's builder's risk may not extend to off-site rental equipment.

3. Theft From Off-Site Storage

Builder's risk policies often have strict theft sub-limits, especially for off-site locations. A $200,000 copper theft at an off-site staging yard might be covered at only $25,000 under the builder's risk sub-limit, leaving the GC to absorb the rest.

4. Transit Damage

A truck carrying $500,000 of custom millwork overturns between the fabrication shop and the job site. Without a specific inland marine or transit policy, the loss may be entirely uncovered.

5. Off-Site Pollution or Environmental Claims

Some construction projects generate off-site environmental exposures (trucking contaminated soil to a disposal site, for example). Most CGL and builder's risk policies have pollution exclusions that leave these losses uncovered unless the sub has specific contractor pollution liability coverage.

What GCs Should Verify

Before the project starts, verify with every sub:

1. Does the sub's CGL cover off-site operations, or only work performed at the project site? Many CGL policies cover off-site work, but exclusions exist.
2. If the sub is storing materials or equipment off-site, is there proper coverage on those locations? This may be inland marine, installation floater, or scheduled off-site storage.
3. For transit, does the sub carry inland marine coverage? If not, budget for the gap or require a specific policy before deliveries begin.
4. For off-site fabrication, who owns the property at each stage of fabrication and delivery? The answer determines whose insurance should respond if a loss occurs during that stage.
5. Does the sub's Auto policy cover the specific vehicles being used? "Any Auto" is broader than "Hired and Non-Owned."

Building these questions into your onboarding checklist ensures you're not guessing about coverage mid-project.

The Role of the Project Contract

Your subcontract should explicitly address off-site exposures:

• Require the sub to carry specific coverage for off-site operations, storage, and transit where applicable
• Require proof of coverage before off-site activities begin
• Require that the sub name the GC and owner as Additional Insured on all relevant policies, including inland marine
• Address who bears risk of loss during each phase of fabrication, delivery, and installation

If the contract is silent on off-site coverage, the default assumptions often favor the party with less coverage, which is usually not you.

How PaperBoss Supports Off-Site Coverage Tracking

PaperBoss tracks whatever document types you configure. For projects with significant off-site exposure (off-site storage, custom fabrication, transit-heavy scopes), you can add required document types beyond the standard COI:

• Inland marine certificates
• Off-site storage endorsements
• Installation floater policies
• Pollution liability certificates for environmentally sensitive scopes

Each sub uploads their specific coverage documentation through a secure link, and PaperBoss tracks expirations and alerts you to lapses. For GCs managing complex projects with distributed operations, this flexibility means you can actually verify every piece of coverage rather than hoping the standard COI is enough.

Start a 14-day free trial, no credit card required.

Frequently Asked Questions

Does builder's risk cover off-site storage automatically?

Not necessarily. Most builder's risk policies cover off-site storage only up to a specific sub-limit, and the storage location may need to be scheduled on the policy. Confirm with your insurance broker before relying on builder's risk for off-site materials.

What's the difference between builder's risk and inland marine?

Builder's risk covers the work in progress at the project site. Inland marine covers property in transit, at off-site locations, and in temporary storage. They complement each other and often need to be combined for full coverage of a complex project.

Who is responsible for a loss during delivery of materials?

It depends on the contract and the parties' insurance programs. Generally, the responsibility shifts from the supplier to the contractor at the point of delivery (FOB origin vs FOB destination). Make sure your subcontract specifies when risk of loss transfers.

Can I require a sub to carry off-site coverage?

Yes. A well-drafted subcontract can require specific off-site coverage types (inland marine, installation floater, contractor pollution liability) as a condition of the contract. Require proof of coverage as part of the onboarding process.

What happens if a sub has an off-site loss with no coverage?

The sub absorbs the loss, which may or may not be within their financial capacity. If the sub can't absorb it and the loss affects the project, you may face delay costs, replacement costs, and potential disputes about who bears the economic impact.

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This article is for educational purposes only and does not constitute legal or insurance advice. Construction insurance coverage is highly fact-specific and contract-dependent. Consult a licensed insurance broker or construction attorney for specific guidance.