Aerial imagery and drones in property underwriting

Insurers use aerial and satellite imagery, and sometimes drones, to see a building without visiting it: roof condition and shape, nearby trees and brush, additions, pools, parking lots, and construction. The images feed models that score the property and flag items for an underwriter. They are useful, and they are imperfect, so a nonrenewal or surcharge based on an image deserves a second look.

What imagery is used for

Underwriting at submission. Before quoting, a carrier checks the address against imagery to confirm the building looks like what the application says: size, number of stories, roof type, occupancy, nearby exposures. A mismatch between the statement of values and the image is a common source of follow-up questions. See the statement of values: what property underwriters need.

Hazard assessment. Imagery supports wildfire scoring (vegetation near the building), hail and wind vulnerability (roof material and condition), flood exposure (grade and drainage) and proximity to other hazards. Hazard scores in turn influence appetite, deductibles and price. See wildfire and commercial property insurance: cover, cost and mitigation and named storm deductibles: how percentage wind deductibles work.

Insurance to value. Measured footprints and roof areas help check whether building limits are reasonable. They do not capture interior finish, but they flag buildings that are plainly larger than reported. See insurance to value: setting the right building limit.

Portfolio and catastrophe work. Carriers use imagery to update exposure data across thousands of locations, particularly after a storm, to see which areas were hit.

Claims. Before-and-after imagery speeds up large catastrophe claims by showing which buildings are damaged, and it can verify what a roof looked like before a storm. Drones add close-up views for adjusters and engineers, particularly on large or unsafe roofs. See the commercial property claim process, step by step.

How the technology works

Aerial imagery comes from planes flying surveys at high resolution (typically capturing a region several times a year, depending on the provider) and from satellites at lower resolution. Computer-vision models extract features: roof material, condition indicators such as staining or missing material, tree overhang, solar panels, and presence of sheds or pools. Drones capture much closer images for individual inspections, and some insurers or inspection firms use them for roofs and facades.

What imagery can see

• Roof shape, size and general material.
• Obvious damage: missing shingles, tarps, ponding.
• Vegetation, nearby buildings and structures.
• New construction, additions, changes since the last image.

What it cannot see

• Underlying roof age or remaining service life. A roof that looks weathered may be sound; one that looks fine may be near end of life.
• The deck, insulation, drainage details and what is under the membrane.
• Interior conditions, sprinklers, electrical systems, housekeeping.
• Anything the image date predates. Imagery may be months old, so a roof replaced after the capture date can still appear bad.
• Cosmetic versus structural. Staining, streaking and discoloration may be cosmetic.

Regulators and imagery-based nonrenewals

Most of the public controversy involves homeowners policies, but the concerns apply to commercial property too. Regulators in several states have issued bulletins saying aerial imagery alone should not be the sole basis for nonrenewal or cancellation. Tennessee's Department of Commerce and Insurance updated its Bulletin 25-03 on April 14, 2026, stating that aerial imagery is one tool and that when an image does not give accurate certainty about a property's condition, the insurer should get clear information through a physical inspection or otherwise. Insurance Journal (May 4, 2026) reported that Tennessee joined other states in warning insurers about proper use of drone images, and that bulletins have also come from Pennsylvania, Connecticut, Massachusetts, Vermont, Alabama and West Virginia. In California, AB 1559, a bill to require advance notice, access to the image and a right to dispute, was reported by Insurance Journal as still in committee in May 2026; check the current status of that bill.

These bulletins mostly address personal lines, and a state's rule on commercial nonrenewal notices is separate. Commercial nonrenewal notice periods and reason requirements are set by each state and vary by line. See policy cancellation and nonrenewal: notice periods and your rights and the workers' comp and benefits requirements by state. Where the state has not spoken to imagery, ask for the image and the date.

If imagery drives a surcharge, condition or nonrenewal

1. Ask for the image, its capture date and what the insurer believes it shows. Put the request in writing through your agent.
2. Compare with the building's actual condition. Roof replacement invoices, permits, inspection reports and dated photos are the strongest evidence.
3. Get an independent roof or building inspection if needed, from a licensed roofer or engineer, and send the report to the underwriter.
4. Fix real defects and document the repair; ask the carrier to rescind the condition or restore eligibility.
5. Escalate to the state insurance department if the nonrenewal seems based solely on a stale or cosmetic image. See how to complain to your state insurance department.
6. Market the account while you work on it. A nonrenewal notice sets a clock. Your broker should approach other carriers in parallel.

Hypothetical example

Say an owner of a small strip center receives a conditional renewal: the carrier says imagery shows moss and discoloration on the roof and requires a roof inspection within 60 days. The owner's roofer reports a membrane in good condition, with a documented replacement in the rear section last year. The owner sends the report and invoices. The carrier removes the condition. Without the evidence, the carrier's model would have stood.

Get ahead of it

• Keep roof records: installation year, warranty, repair history, inspection reports.
• Trim trees and clear debris and vegetation, especially in wildfire areas.
• Update your statement of values after additions or renovations so the application and the images tell the same story.
• Ask your broker whether your carriers use imagery and which flags they raise.
• If you operate drones yourself, for inspections or deliveries, the exposure is separate; see commercial drone insurance: liability, hull and payload coverage.

Key takeaways

• Insurers use aerial imagery, satellite data and drones to check the application, score hazards, estimate values and handle claims.
• Imagery cannot see roof age, interior conditions or anything after its capture date, and it can mistake cosmetic wear for damage.
• Several state regulators have said aerial imagery alone should not justify a nonrenewal, mostly for homeowners; commercial rules are separate and vary.
• If imagery triggers a condition or nonrenewal, ask for the image and date and respond with inspection reports, invoices and photos.
• Start shopping early; a nonrenewal notice starts a clock.