When they can’t verify something, they assume the worst case. That’s true across roof, electrical, plumbing, water mitigation, HVAC and structural work — any system where the work is invisible unless you can prove it happened.
Roof is the clearest case, because the industry has actually measured it. A home built in 1997 and re-roofed in 2022 gets priced like a 29-year-old roof — the oldest it could possibly be — unless the invoice proves otherwise. Most people have that invoice. It’s just in a drawer, not in front of the underwriter.
The data carriers rate you on is wrong far more often than you’d think. More than a quarter of roofs get misclassified as under 15 years old, and insurers estimate $1.31B a year in premium mispriced because of it.
When a carrier can’t verify your roof’s age, it falls back on the age of your house — because that’s the oldest the roof could be. If you’re the one who put a new roof on, you’re the one who eats that assumption. Homeowner-reported roof age is itself understated by about five years on average, sometimes by fifteen or more — which is exactly why carriers stop trusting what you tell them and default to the house’s birth year instead.
North Carolina has had wind-mitigation rate credits since 2011, through the Department of Insurance. The mechanism is a certificate — something you hand your agent to get the credit.
Elsewhere, regulators already treat a verified attribute as real money, not a guess. Alabama’s insurance department set published discount benchmarks of 35–60% on the hurricane portion of premium for IBHS FORTIFIED-certified homes. A University of Alabama study of 40,000+ insured properties after Hurricane Sally found FORTIFIED construction cut loss frequency by 55–74% and claim severity by 15–40%. That’s Alabama’s program and Alabama’s numbers, not North Carolina’s, and not a projection onto your bill — it’s evidence that insurers and regulators already treat documentation as real money.
The same gap shows up everywhere proof is possible but missing. A permit shows the electrical panel was actually upgraded. An install record shows when the water heater went in, or when the HVAC system was replaced. A certificate shows a repipe or a structural fix met code. Home Pro’s insurance packet collects exactly these — organized by system, each line backed by the record it came from — so what you can prove isn’t sitting in a drawer when your agent asks for it.