Geolocation, heat and passive homes test insurance underwriting

By Daniel Okafor

Phius, a leading U.S. passive-house certifier, completed a record 155 design certifications in 2025. The median project expanded from roughly 6,000-7,000 square feet in 2019-2024 to 25,000 square feet. Phius attributed part of that jump to a surge in multifamily projects in New York and Massachusetts.

An insurance-industry risk analysis connects three developments usually handled in separate departments. Geolocation data now sits inside commercial operations. Extreme heat threatens materials and workers. Passive-house adoption changes how buildings contain heat and moisture.

What does the 2026 privacy ruling change?

In Chatrie v. United States, the U.S. Supreme Court ruled on law enforcement's use of a geofence warrant. The Court held that the method “constituted a search under the Fourth Amendment.” It also recognized “a reasonable expectation of privacy in their cellphone location records.”

The analysis expects the 2026 decision to increase judicial sensitivity to how companies collect, store, share and monetize location information. That matters even though no single comprehensive federal law currently governs personal-data collection and retention.

Geolocation data identifies or indicates a device, user or object's geographic location. GPS, IP-address tracking, Wi-Fi triangulation and cellular signals generate it. The technology now extends beyond cellphones into Wi-Fi and Bluetooth products, including wearables, ride-share platforms and robotic lawnmowers.

The analysis identifies several commercial uses:

• Retailers and advertising firms measure foot traffic, analyze consumer behavior and deliver targeted marketing.
• Wearable-device manufacturers use location data for health and physical-activity diagnostics.
• Financial institutions use location information to help detect fraud.

As privacy laws, regulatory requirements and litigation involving geolocation data continue to develop, organizations that collect or use the information may face increased legal, compliance and risk-management demands.

Potential claims now include:

• Cyber exposure.
• Technology errors and omissions.
• Directors and officers liability.
• Professional liability.

How does extreme heat weaken buildings?

The risk review cites record-setting temperatures across much of the U.S. and Europe this summer as evidence of a rapidly heating planet. The direct danger extends beyond human health. Heat can reduce the durability of concrete and steel, while also increasing workplace risks.

A study published in the Journal of Engineering in August 2025 found that curing temperatures can alter concrete's microstructure. Concrete durability remains highly sensitive to temperatures that are too hot or too cold. High temperatures can accelerate or inhibit cement hydration, affecting pore structure, microcrack development and permeability.

A 2025 study in Buildings, the international, peer-reviewed, open-access journal on building science published by MDPI, examined structural steel under temperature-humidity cycles. Researchers reported that humid environments caused corrosion that increased with repeated exposure. Repeated corrosion damage substantially reduced steel's strength, ductility and fatigue life over time.

According to a 2019 study, construction workers accounted for approximately one-third of occupational heat-related deaths between 1992 and 2016. Workers represented only around 6% of the overall workforce during that period.

Longer and more frequent heat waves across U.S. regions may increase those dangers. The analysis also links unfavorable heat conditions to lower construction productivity. Project delays, cost overruns and heightened job-site safety risks could follow.

Can a sealed home create new losses?

Rising energy costs and interest in lower-carbon living have pushed many homeowners toward energy-efficient construction. Passive-house designs can also create built-in insurance risks, according to the analysis, because their efficiency features can trap moisture and make ventilation performance more consequential.

A passive house contains heat during colder months and keeps it out during warmer months. It continuously cycles fresh air through the home. Its design typically combines:

• A super-insulated envelope and airtight construction methods.
• Air barriers and the elimination of thermal bridges at junctions.
• Heat-recovery ventilation that supplies continuous fresh air.

Passive-building proponents suggest these designs can use up to 90% less heating and cooling energy than conventional construction. The analysis presents that saving as a significant incentive for builders and homeowners. Buildings account for nearly 37% of U.S. energy consumption.

Airtight construction also removes an escape route for humidity. What might dissipate in a conventional structure typically must be removed mechanically in a passive house. The American Society of Civil Engineers has identified mold as a potential unintended consequence of certain energy-efficient approaches, citing cases where insulation blocked airflow entirely.

Passive-design standards generally include hygiene and moisture-control criteria intended to prevent mold, rot and corrosion. Sustained performance still depends on building inhabitants and property managers operating ventilation and related systems properly.

A 2024 review of existing research on passive-housing performance found overheating risks across numerous climate regions. Building characteristics, climate conditions and occupant behavior shaped the findings. The authors said rising temperatures and other climate-related factors may exacerbate those challenges.

For insurers, the practical response is to identify and adapt risk-management strategies before privacy scrutiny, longer heat waves and dependence on mechanical ventilation turn today's design choices into claims.