Do you know what your homeowners policy says about building code? Most homeowners never look for that clause until a storm claim is underway, a roofer pulls a permit, and the estimate suddenly includes materials that the old roof never had.
That gap between what was on your house and what the code now requires is where a small, often-overlooked piece of your policy does its work. It is called ordinance or law coverage, and it can decide whether several thousand dollars of upgrades land on the insurer's ledger or on yours.
What Ordinance Or Law Coverage Is
Ordinance or law coverage pays the increased cost of repairing or rebuilding your home when a local building code, ordinance, or law requires you to do more than simply put back what was there. In other words, it covers the difference between like-kind replacement and code-compliant replacement.
A standard homeowners policy is built around restoring your property to its pre-loss condition. However, a building department will not issue a permit to restore a roof to a condition the current code no longer allows, so something has to pay for the difference.
On many HO-3 policies written on Insurance Services Office (ISO) forms, this appears as an additional coverage equal to 10% of the Coverage A dwelling limit. Keep in mind that insurers are free to modify, reduce, or remove that wording, which is why your own declarations page and endorsements matter more than any general rule.
Why A Storm Claim Triggers Current Code
An existing roof is generally grandfathered, meaning it can remain as installed even if the code has changed since the day it went on. That protection typically ends once the roof is replaced or substantially repaired under a permit.
Most U.S. jurisdictions base their residential rules on some edition of the International Residential Code (IRC), with local amendments layered on top. Chapter 9 covers roof assemblies, and a permitted reroof is expected to meet the edition your city or county has adopted — not the edition in force when your house was built.
This is why a 20-year-old roof that performed perfectly well can generate a list of required upgrades the moment a hailstorm or windstorm forces a replacement. The old roof was legal; the new one has to be legal too, and legal now means more material and more labor.
The Code Upgrades That Most Often Show Up On A Roof Claim
The specific requirements depend on your local code edition and climate zone. That said, the upgrades that most commonly appear on a post-storm roof estimate include but are not limited to:
- Ice barrier underlayment. The IRC requires an ice barrier, such as a self-adhered ice-and-water membrane, at the eaves in areas where there has been a history of ice forming along the eaves. It typically runs from the eave edge to a point at least 24 inches inside the exterior wall line, and older roofs in cold climates often have none.
- Drip edge. Drip edge at eaves and rake edges became a requirement for asphalt shingle roofs in the 2012 edition of the IRC. Many homes reroofed before local adoption of that edition never had it, which makes it one of the most frequent code line items on a claim — our guide to drip edge and gutter apron explains what it does.
- Solid roof decking. Asphalt shingles require solid sheathing under the IRC, so homes with older spaced-board (skip) sheathing may need new plywood or OSB before shingles can go down. For a closer look at when decking gets replaced and what it costs to evaluate, see our explainer on roof decking replacement.
- Full tear-off instead of a layover. Code generally prohibits adding a new layer of shingles over two or more existing layers, or over a roof that is water-soaked or deteriorated. If your current roof already has two layers, the new roof requires a complete tear-off.
- Flashing and ventilation details. Some jurisdictions require updated flashing at walls and chimneys or minimum attic ventilation ratios during a reroof. Our guides to roof flashing and roof ventilation cover how those systems work.
All of these items share one trait: they exist on the estimate because the code demands them, not because the storm damaged them. That distinction is exactly what the adjuster will be evaluating.
If you live in a cold climate, the ice barrier item deserves special attention. Our guide to ice dams explains why the requirement exists and why it is worth having even where it is optional.
How Much The Policy Pays
Under ISO-style HO-3 wording, ordinance or law coverage is additional insurance on top of your dwelling limit, capped at a percentage of that limit. For example, a home insured for $300,000 under Coverage A with the standard 10% provision would have up to $30,000 available for code-driven costs.
For a typical roof, that amount is often enough to absorb ice barrier, drip edge, and sheathing upgrades. However, it can run short when a claim also triggers larger code work, such as structural changes, or when the carrier has written a lower percentage into your policy.
This is why many insurers offer an endorsement that increases the ordinance or law limit. The ISO version is commonly referred to as HO 04 77, and carriers often sell increases in steps such as 25% or 50% of Coverage A, depending on the company and state.
On the contrary, some policies — particularly lower-cost or non-standard forms — exclude ordinance or law coverage altogether. In that case, the homeowner pays for every code-required upgrade out of pocket, even when the underlying storm damage is fully covered.
When The Money Is Actually Paid
Ordinance or law coverage is usually paid when the increased cost is incurred, not when the claim is first approved. Most policies require the work to be completed, or at least contracted and underway, before the code-upgrade portion is released.
As a result, the first check from your insurer may leave out code items entirely. This is especially common on replacement cost policies, which often pay actual cash value first and release the rest after repairs are finished — our breakdown of actual cash value vs. replacement cost walks through that holdback.
Remember that your roofer's estimate should list code items separately from like-kind replacement items. When they are blended together, it becomes much harder for the adjuster to approve the code portion, and much harder for you to track what has been paid.
When Ordinance Or Law Coverage Does Not Apply
Even a policy with generous ordinance or law limits has boundaries. Some of the situations where coverage typically does not respond include:
- The underlying damage is not covered. Ordinance or law coverage is tied to a covered loss, so if the claim for wear, tear, or deferred maintenance is denied, the code upgrades are denied along with it. Our guide to a denied roof claim covers the most common reasons.
- No code actually requires the upgrade. If your jurisdiction has not adopted the provision, or has amended it out, the insurer has no obligation to pay for it. A roofer's preference or a manufacturer's warranty requirement is not the same as an ordinance.
- The work was never permitted. Because the coverage responds to enforcement of a law, unpermitted work makes it difficult to prove the upgrade was legally required.
- Pollutant testing or cleanup. ISO-based forms exclude costs to test for, monitor, or clean up pollutants, even when an ordinance requires it.
- Loss in property value. The coverage pays increased construction costs, not any decrease in your home's value caused by a code requirement.
Additionally, code items on a detached structure the storm never touched are generally outside the claim. The coverage extends to undamaged portions of the damaged building only when that work is necessary to complete the covered repair.
How To Check Your Own Policy
You can find out where you stand before the next storm rather than after it. Here's a list of the steps to take:
- Read the declarations page. Look for an ordinance or law line, a percentage, or an endorsement number referencing it.
- Read the additional coverages section. On an HO-3, ordinance or law usually appears alongside debris removal and similar coverages, with its percentage stated.
- Look for amendatory endorsements. Some state-specific or carrier endorsements reduce or remove the coverage, and these override the base form.
- Ask your agent a direct question. Ask what percentage of Coverage A is available for ordinance or law and whether it is inside or on top of the dwelling limit.
Once you know the number, you can compare it against the likely code upgrades for your roof and decide whether an increased limit is worth its premium.
How To Handle A Code-Upgrade Dispute
Code items are one of the most common points of disagreement on a roof claim. Fortunately, most of these disputes turn on documentation rather than interpretation.
First, ask your roofer to cite the specific code section and the edition your jurisdiction has adopted for each code item. Adjusters respond far better to a section number than to a general statement that the item is required.
Next, get something in writing from the building department when possible. A permit, an inspection correction notice, or a letter from the local building official is strong evidence that the upgrade is being enforced rather than suggested.
Then, document the existing roof before tear-off. Photos showing the absence of drip edge, the spaced-board sheathing, or the number of existing layers establish what was there — our guide on how to document storm damage for an insurance claim covers what to capture.
Finally, if the insurer still will not budge, a licensed public adjuster may be able to help present the code portion of the claim. Our explainer on when a public adjuster makes sense for a roof claim outlines how they are paid and what they can and cannot do.
Keep in mind that code disputes often overlap with other scope disagreements. If your claim also involves shingles that no longer match, our guide to roof matching disputes explains how that separate question is usually handled.
Putting It All Together
When a storm forces a roof replacement, current code sets the scope and your policy decides who pays for the part of that scope the old roof never had. Ordinance or law coverage is the bridge between the two, and its size is set long before the storm arrives.
The decision rule is straightforward: if your roof predates the code edition your jurisdiction now enforces, and especially if it lacks drip edge, an ice barrier, or solid decking, confirm your ordinance or law percentage now. If it is missing or small, ask your agent what an increased limit would cost and weigh that against the upgrades your roof would likely require.
After all, the most expensive time to discover a gap in your coverage is in the middle of a claim. A few minutes with your declarations page today can prevent a difficult conversation with your adjuster later.
This article is for informational purposes and is not financial / mortgage / contractor advice. Consult a licensed professional in your jurisdiction.