What Is a Building Certificate of Insurance and When Do You Need One?

If you manage a building and someone hands you a certificate of insurance, you probably know you're supposed to do something with it, but maybe not exactly what. And if you're the one being asked to provide one, you might be wondering which form, which coverage, and how much. Either way, this guide covers both sides.

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What Is a Building Certificate of Insurance? 

A building certificate of insurance is the document that confirms a contractor, service provider, or third-party partner has active insurance coverage before they start work on your property. It's a one-page snapshot — not the full policy — and it's the standard way to verify that coverage is in place.

A building certificate of insurance (COI) is a one-page document issued by an insurer that confirms a contractor, third-party partner, or service provider has active insurance coverage. You’re getting a snapshot of the insurance policy without going through dense insurance documents.

On the document, you will find details like who is insured, what kind of coverage they carry, coverage limits, the dates the coverage is valid, and policy limits.

Most building COIs follow a standard format called the ACORD 25 form. Once you’ve seen one COI, it gets easier to recognize what you’re looking at.

What a building COI doesn't do: it can't be used to file a claim, it doesn't change the terms of the underlying policy, and it doesn't guarantee the coverage meets every requirement in your specific contract. It confirms a policy exists. Verifying that it's the right policy for your situation is the next step.

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When Does a Building Require a Certificate of Insurance?

A building usually requires a certificate of insurance when someone needs access and work is about to begin. Here’s a practical way to spot such moments:

• Contractors doing renovation or repair work:
  Whether it’s a quick fix or larger construction projects, general contractors bring tools, equipment, and activity that can impact the property. A COI for contractors confirms they have the right protection in place.

• Movers accessing the building:
  Movers bring a lot of activity, like furniture in transit, tight turns in hallways, and elevators working overtime. A certificate of insurance (COI) assures there’s protection in place if your building gets damaged.

• Delivery crews handling large or high-value items:
  Most deliveries pass by without much thought. But when something large or valuable is involved, you start thinking about what could go wrong. Having coverage in place takes the worry off your mind.

• Maintenance and service partners:
  Electricians, HVAC technicians, and cleaners keep things running day to day. When they’re on-site regularly, a COI makes it clear who’s accountable if something goes wrong.

• Tenants bringing in third-party partners or subcontractors: When work is handled by someone who isn’t on the lease, a COI helps confirm they’re covered.

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Who Provides the COI and Who Requests It?

If you manage or own the building, you’re the one who requests the COI. It’s simply part of coordinating access and making sure everything is in order before work begins.

The contractor or third-party partner doesn’t create the document themselves. Their insurance provider or broker generates the COI and sends it over, since this is a routine request and helps reduce risk.

Asking for a COI is just part of working with third-party partners, and most are used to providing one.

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What Should a Building COI Actually Include?

Once you have a COI in hand, the next question is simple: “What actually matters?” Here’s what each one really means:

• General Liability Insurance
  General liability covers property damage or injuries to others caused by the partner’s work. If a contractor accidentally damages a wall, this is the coverage that responds first.

• Workers’ Compensation
  Workers’ comp applies if someone working for the partner gets injured on the job. If an electrician slips while working on-site, their own insurance policy handles medical costs and lost wages. You are not held liable.

• Auto Liability Insurance
  This covers vehicles used as part of the work. For example, if a delivery truck hits part of the building while unloading or causes damage in the parking area.

• Umbrella/Excess Liability Insurance
  Umbrella or excess liability is the extra protection on top of the other policies. If a claim goes beyond the limits of general liability, this coverage bridges the gap so costs don’t fall back on the building.

• Additional Insured Status
  Here, your building (or company) is listed on the third-party partner’s policy. The additional insured status gives you direct protection under their insurance.

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What Happens If a COI Is Expired or Missing?

An expired or missing COI means there’s no clear confirmation that the active insurance coverage exists. The gap can make routine decisions feel less certain.

• Liability becomes harder to confirm
  If damage or an injury occurs, there’s no simple way to point to current coverage.

• Projects may pause
  Many buildings hold off on access or work until valid insurance is verified. 

• Costs take longer to resolve
  Without confirmed coverage, even small issues can involve more back-and-forth, and some expenses may take longer to sort out.

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How Do You Spot a Fraudulent or Invalid COI?

Most COIs you receive will be perfectly valid, but some might be fraudulent or invalid. A quick review usually spots things like:

• Policy details that don’t quite match
  Missing policy numbers, mismatched names, or small inconsistencies can signal fraudulent COIs.

• Coverage dates that don’t line up
  If the policy expires before the work is scheduled to finish, coverage may not be in place for the full duration of the project.

• Information that can’t be verified
  If needed, a call or email to the listed insurer or broker can confirm whether the policy is active. Most providers respond to these checks.

• Certificates sent without a clear source
  A COI should come from the partner’s insurance agent or broker. When documents are forwarded without context, you might be dealing with a fraudulent or invalid COI.

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How Do Building Owners Keep COI Compliance From Becoming a Full-Time Job?

COI management feels simple at first. Then you’re chasing third-party partners, tracking renewals manually, and catching issues at the last minute.

As partners add up, renewals get missed, certificates expire, and problems show up when work is ready to begin.

This is where you need the right support.

illumend, powered by myCOI, brings structure to COI tracking by handling the parts that eat up time day after day. The insurance compliance platform brings over 16 years of insurance compliance expertise into an AI-powered platform to track, verify, and manage COIs in real time.

Third-party partners don't need to create accounts or log in — one link gets them where they need to go. Lumie™ reads every certificate, flags gaps or expiring coverage in real time, and guides partners through exactly what needs to be updated and why — in clear language anyone can follow, no insurance background required. 

You’re not digging through emails or catching issues at the last minute. You can just see what’s covered and what still needs attention.

With illumend, teams are able to stay on top of compliance, so work can move ahead without getting stuck. Schedule a demo to see how your team can manage building COI compliance without the manual follow-up.

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