Thirteen state insurance departments have now issued bulletins specifically governing aerial imagery in homeowners underwriting, and they have converged on the same line: cosmetic conditions cannot support an adverse action, structural ones can.

That distinction is easy to state and hard to compute from a single overhead photograph, which is where the compliance problem actually sits.

Key Takeaways

  • 13 states have aerial-imagery-specific bulletins: Alabama, Delaware, Louisiana, Maine, Maryland, Massachusetts, Michigan, New Hampshire, North Carolina, Pennsylvania, Rhode Island, Tennessee and West Virginia.
  • Image age limits run from 12 months to 24, with Louisiana most permissive at 24 and Colorado and Kentucky at 12. California and New York have proposed 180 days.
  • Roof streaking and discoloration are named explicitly in the Maryland, Rhode Island and Kentucky rules as conditions that cannot independently justify nonrenewal.
  • 24 jurisdictions have adopted the NAIC AI Model Bulletin, including nine of the 13, and it states that insurers cannot outsource accountability for vendor AI.
  • 1.57 to 7.5 centimeters per pixel is the resolution range the major vendors capture at, which is the physical constraint on telling algae from a missing shingle.

The 13 States and the Standard They Share

Each bulletin reflects local law, but four pillars repeat: image quality and recency, the cosmetic-versus-structural distinction, notice and transparency, and a consumer dispute path.

The recency requirement is the most operationally concrete, and the least consistent:

  • Louisiana (R.S. 22:1339) caps imagery at 24 months for evaluating property condition, with no limit where imagery is used only to identify or locate a property.
  • Rhode Island (Bulletin 2025-3) caps it at 15 months and requires a clear, accurate and current view.
  • Colorado (Bulletin B-5.57) and Kentucky both require 12 months, with Kentucky adding that satellite images alone are insufficient.
  • Georgia's HB 1344 requires date-stamped images no older than 12 months from the notice date; Indiana's HB 1260 sets 24.
  • Alabama, Maine, Massachusetts, Michigan and West Virginia prescribe no number, requiring only that imagery be current and accurate.

Proposed law is tighter still: California's AB 1559 and New York's S9156 would both cap image age at 180 days, and Vermont's pending rule at 15 months with mandatory physical inspection for blurry or low-resolution captures.

A carrier writing in 30 or more states therefore faces a feed that can be compliant in Louisiana and non-compliant in Colorado for the same property on the same day. The practical default most are adopting is an internal 12-month maximum, which clears every enacted rule and none of the proposed 180-day ones.

The Cosmetic Line Is a Model Problem, Not a Policy One

Massachusetts Bulletin 2025-02 says cosmetic damage alone cannot support nonrenewal. Maryland Bulletin 25-10 names roof streaking and discoloration. Rhode Island states it outright: images showing only cosmetic damage "without functional or structural damage are not sufficient to independently support cancellation or nonrenewal."

The computer vision model has to separate dark staining from algae growth, which does not change loss probability, from dark patches caused by missing or deteriorated shingles, which does. At the resolutions currently in production, 1.57 to 7.5 centimeters per pixel depending on vendor and capture frequency, that separation is not always available from one overhead image.

The published failure modes are not subtle. Solar panels have been scored as structural damage. Moss on a neighbor's tree has been counted against the wrong property. Consumer complaints include cancellation decisions taken on images of a different house.

For an actuary that converts a compliance rule into a rate filing question. An imagery-derived variable has to demonstrate a relationship to expected loss frequency or severity, not merely correlate with property age, roof material or climate zone. Streaking correlates with all three, which is precisely why it makes a plausible-looking variable and an indefensible one, and why examiners in the states running the NAIC evaluation pilot will look for the distinction in filings that use these scores.

The dispute requirement adds a second number to the expense side. Michigan tells insurers to inspect physically or offer the policyholder a licensed contractor's verification. Massachusetts requires prompt review of submitted evidence and revision where warranted. Georgia's HB 1344 and Indiana's HB 1260 both establish appeals with 60-day remedy periods.

None of the bulletins say how many disputes to expect. But if even 5% to 10% of flagged properties generate one that requires an inspection follow-up, the per-policy inspection cost re-enters the expense loading, and the business case that assumed imagery eliminates field inspections has a floor under it that it did not price. That is a model validation question for the rate filing as much as an operations one.

Accountability Does Not Move to the Vendor

The NAIC Model Bulletin, now adopted in 24 jurisdictions including nine of the 13 aerial imagery states, is explicit that insurers cannot outsource accountability and must manage vendor AI and data as if it were their own.

That places the whole cosmetic-versus-structural burden on the carrier rather than the supplier. If Nearmap, Cape Analytics, ZestyAI or Verisk scores cosmetic streaking as structural damage and the carrier acts on the score without independent validation, the carrier holds the regulatory exposure. The vendor sold a number.

The vendors are repositioning accordingly rather than absorbing the risk. Nearmap now publishes a state-by-state compliance guide mapping age limits, cosmetic rules, dispute processes and inspection triggers. ZestyAI markets itself as regulator-approved AI with more than 200 regulatory approvals. Verisk grew aerial imagery revenue 30% over two years and shipped seven new AI modules in 2026. None of that positioning transfers accountability, and the NAIC's 12-state evaluation pilot running January through September 2026 gives examiners a standardized way to test whether the carrier exercised any.

The structural bind is the interaction of the two constraints. Defaulting to the most restrictive applicable recency standard is the only way to run one national workflow, and doing so shortens the useful life of every capture, which raises the refresh cost per property. Tightening resolution or refresh frequency to make the cosmetic call reliable raises it again. The regulatory framework does not prohibit aerial imagery underwriting. It removes most of the cost saving that justified it, in the same way the four-regime state AI patchwork does, and the claims-handling scrutiny the NAIC has flagged extends the same logic to imagery-based claim decisions.

Further Reading

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