Depreciation is one of the more consistently misunderstood pieces of a property insurance claim, and it comes up often in appraisal. At its core, depreciation reflects the idea that a building component loses value over time as it ages and is used, and that a claim payment for its replacement can account for that reduced remaining value depending on the terms of the policy.
Useful life is the starting point for most depreciation calculations. Different building components have different expected service lives, an asphalt shingle roof might carry an expected life of somewhere between twenty and thirty years depending on the product, while vinyl siding, gutters, and other exterior components each have their own general ranges based on manufacturer data and industry experience. These figures are guidelines, not rigid rules, and actual condition often matters more than age alone.
This is where condition adjustments come in. A fifteen year old roof that has been well maintained, with intact flashing, no signs of granule loss beyond normal wear, and no prior leak history, may reasonably be depreciated differently than a fifteen year old roof showing significant curling, brittleness, or prior patch repairs. An appraiser’s job in evaluating depreciation includes looking past the stated age of a component and actually assessing its physical condition at the time of loss, since two components of the same age in different conditions do not necessarily have the same remaining useful life.
Disputes over depreciation rates are common precisely because there is a reasonable range of professional judgment involved. Different depreciation schedules and pricing tools may suggest different percentages for the same type of component, and appraisers can reasonably disagree about how heavily to weigh visible wear versus stated age. This is one of the areas where an appraisal panel’s role is most clearly about forming an independent, supportable opinion rather than defaulting to a single software generated number, since automated depreciation schedules are a starting reference point, not a final answer.
Recoverable and nonrecoverable depreciation is a separate but related concept tied to policy language rather than physical condition. Recoverable depreciation refers to amounts that a policyholder may be able to claim back after repairs are completed, typically under policies with replacement cost coverage, once the work is done and documented. Nonrecoverable depreciation is not paid back under any circumstance, regardless of whether repairs occur. Whether depreciation on a given claim is recoverable or not is a matter of the specific policy language, and appraisers are not in a position to interpret or waive that language, they generally work within the framework the policy provides regarding actual cash value and replacement cost.
For a Midwest home dealing with a hail damaged asphalt shingle roof, this often plays out as a fairly specific set of questions, what is the roof’s stated age, what does the physical condition actually show, what depreciation percentage does that combination reasonably support, and how does the applicable policy language treat that depreciated amount. None of these questions have a single mechanical answer, which is exactly why depreciation is one of the more frequently appraised issues in property claims.
Property owners and carriers benefit from the same thing here that helps everywhere else in appraisal, clear documentation of the component’s actual condition, not just its calendar age, since that documentation is what supports a well reasoned depreciation opinion.
This article is general education about how the appraisal process commonly works. It is not legal advice, and specific procedures can vary by state and policy.
Russ Lis is a working property insurance appraiser and umpire based in Minnesota, serving clients nationwide. His construction background supports grounded, condition based depreciation opinions rather than reliance on age alone. Contact Appraisal Resolution.