The code-upgrade gap on older buildings.

The unendorsed ISO building form gives back only a sliver of the code-upgrade cost. Under CP 00 10 10 12, Additional Coverage A.4.e Increased Cost Of Construction is capped at the lesser of $10,000 or 5% of the building limit, and only on buildings where the Replacement Cost Optional Coverage applies, meaning you elected to insure the building for what it costs to rebuild rather than its depreciated value. On a $4 million building the 5% leg never binds, so the most that giveback pays is $10,000 against a $4 million rebuild. Source: ISO form CP 00 10 10 12, Building And Personal Property Coverage Form, A.4.e.

Why older and mixed-use buildings need it most

A building constructed under older code can trigger required upgrades to electrical, structural, fire-protection, accessibility, and energy systems when it is rebuilt. The older the building and the stricter the jurisdiction, the wider the gap between what the policy pays to restore and what code demands. Mixed-use and high-rise buildings face the steepest upgrade costs, which is exactly where this coverage earns its keep.

The three parts, and why each matters

Code can force you to tear down undamaged portions of a partially damaged building, and a standard policy will not pay for the lost value or the demolition. It also will not pay the increased cost of building back to current standards. Ordinance and law covers all three, and each can be a large number on a commercial structure. Sizing them to the building's age and jurisdiction is the real work.

The form, and the three things its schedule decides

The coverage is bought by endorsement. On an ISO commercial property policy that endorsement is CP 04 05, Ordinance Or Law Coverage, filed as the 09 17 edition in Arizona, Colorado, Idaho, Montana, Nevada, New Mexico, Oregon, Texas, Utah and Washington. California is not on the current forms list for this endorsement, so if your building is in California, confirm the form and edition on your own policy before relying on any of this. The reason you need the endorsement at all is CP 10 30 09 17, the special causes-of-loss form, whose Ordinance Or Law exclusion at B.1.a rules out the cost of complying with any law regulating construction or repair, or requiring the tearing down of property.

Three things decide what you actually have, and all three are set on the endorsement's schedule, which is the fill-in grid printed on the face of the form. Ask to see it.

Coverage A has no separate limit. The loss in value of the undamaged portion you are forced to demolish is paid inside your building limit. It does not increase it. This is the single most commonly misstated point on the coverage, and it means a building insured close to its replacement cost has very little room for Coverage A once the rebuild is paid for.

Coverage B and Coverage C carry their own scheduled limits, either separately or as a combined limit. Coverage B is the cost to demolish the undamaged parts and clear the site. Coverage C is the increased cost of construction. A token limit here is close to no limit at all on a commercial structure.

The post-loss option is a checkbox. By default the ordinance has to be in force at the time of loss. Mark the Post-Loss Ordinance Or Law Option in the schedule and the endorsement extends to an ordinance passed or revised after the loss but before your reconstruction begins, provided compliance is a condition of getting the permit or the certificate of occupancy. Codes change during long rebuilds. That checkbox is worth asking about by name.

One limit worth knowing: the endorsement responds only to the minimum requirements of the ordinance. If you take the opportunity to build past what code actually demands, that part is on you. It also applies separately to each building, so a schedule of properties needs the limits set building by building.

A tenant who has paid for improvements has a parallel problem and a parallel form, CP 04 26 09 17, which buys the same A, B and C structure on the tenant's own improvements and betterments. It carries the same California caveat as CP 04 05. See tenant improvements and betterments.

Why the exposure is so widespread

There are about 5.9 million commercial buildings in the United States and the median year of construction is 1981, with roughly 75% built before 2000, according to the Energy Information Administration's Commercial Buildings Energy Consumption Survey (2018 round, the most recent completed). A building with a 1981 median vintage is a building that will not be rebuilt to the code it was built under.

Code adoption on the other side of that equation has not kept pace. FEMA's Building Code Adoption Tracking reported in June 2025 that only 21% of US jurisdictions had adopted current natural-hazard-resistant building codes, covering 38% of the population. That cuts both ways for an owner. Where codes have moved, the upgrade bill after a loss is larger. Where they have not yet, they can move during the rebuild, which is what the post-loss option is for.

How we handle it

We weigh the building's age, its jurisdiction, and any major renovations against the way code would apply after a loss, then size the ordinance and law limits to a realistic upgrade scenario. On an older building it is usually inexpensive relative to the exposure it closes, which makes it one of the higher-value endorsements in a commercial program.