Stranded-Asset Risk: How Climate and Insurance Costs Change Real Estate

The short answer

Insurance has become an early-warning market for stranded assets: properties in high-hazard locations face steeper premiums or outright withdrawal of coverage, and research shows these costs get capitalized into lower sale prices and longer time on the market. A stranded asset is simply a building that loses significant value before its economic life ends—through unaffordable premiums, tightening regulation, or falling tenant demand. Screening location exposure and physical resilience now is the cheapest protection you can buy.

Key takeaways

A stranded asset is a building or site that loses significant value before the end of its economic life—not only after a disaster but also through unaffordable insurance, tightening regulation, and evaporating tenant demand.
Insurance is the earliest market signal: US homeowners' premiums rose roughly a third between 2020 and 2023, with the sharpest increases in hurricane- and wildfire-exposed areas, driven largely by a doubling of reinsurance costs.
Risk has three layers—physical (flood, heat, wildfire), transition (energy-efficiency rules), and market (the green premium and the brown discount on inefficient buildings).
Protecting value means stress-testing each asset: current and forward-looking hazard data on the location, the building's resilience, insurance affordability, and lender requirements.
Data and methods are still fragmented—most practitioners cite a lack of granular property data—so every figure is an estimate under assumptions, not a precise forecast for a given address.

What turns a property into a stranded asset

The term "stranded asset" migrated from energy into real estate: it describes an asset that loses significant value or becomes unusable before the end of its expected economic life. In the built environment, this happens through three overlapping channels. The first is physical—floods, extreme heat, and wildfire drive up repair and operating costs, cut rental income, and raise insurance premiums. The second is regulatory—tighter energy-efficiency standards can make a building legally unlettable without expensive work. The third is market-based—corporate climate targets and rising energy bills make inefficient, high-carbon buildings less attractive to tenants and buyers.

In the United Kingdom, where the debate is most advanced, proposals would raise the minimum energy-performance rating for commercial property by 2031 and for rented homes around 2030; estimates suggest a large share of offices in major cities and millions of homes would need upgrades to comply. That is a concrete example of a regulatory shift effectively stranding an otherwise functional building. Crucially, stranding is rarely a binary event—it is a gradual erosion of value you can often see coming through indirect signals such as rising premiums, longer time on the market, and softening rents.

Physical risk: climate damage, rising upkeep costs, climbing insurance premiums.
Transition risk: energy-efficiency rules, disclosure requirements, fines for non-compliance.
Market risk: tenants leaving over climate targets, a green premium on efficient buildings and a brown discount on the rest.

Why insurance is the earliest price signal

Insurance reprices risk faster than property, because buildings are durable and revalue slowly. A Wharton study built from tens of millions of mortgage escrow payments across the United States between 2014 and 2024 found that average homeowners' premiums rose from roughly $1,900 to about $2,500 a year between 2020 and 2023, with far sharper increases in areas exposed to hurricanes and wildfires. The main driver was reinsurance—"insurance for insurers"—whose price roughly doubled over several years and was passed through to homeowners.

Economists describe the surge as a sharp rise in the cost of living in harm's way, and they expect these costs to be capitalized into house prices over time. The early evidence already shows it: in states with heavy climate loading such as Florida, properties with significant exposure have lost billions of dollars in relative value, and homes in flood zones sit on the market longer. Rising premiums shrink the pool of buyers and add uncertainty for sellers—often the first visible sign that an asset is starting to strand.

US homeowners' premiums rose about a third in 2020–2023, concentrated in disaster-prone areas.
Reinsurance costs roughly doubled in 2017–2023, and the increases were passed on to policyholders.
Homes in flood zones sell more slowly: the market penalizes liquidity even before the price drops.

Location decides: physical versus transition risk

Climate risk is location-specific by nature: the impact of floods, heat, and wildfire depends on local geography, exposure, and vulnerability, and cities that invest in flood defenses, heat plans, and water security retain capital longer. Municipal adaptation effort has therefore become a competitive factor—areas that plan for climate tend to hold their value, while unprepared districts can lose long-term investment appeal.

But location alone is not enough. Even in an equally hazardous zone, buildings differ: one has flood walls, basement pumps, and proper ventilation; another does not. According to the OECD, risk assessment in real estate remains fragmented—close to 60% of respondents to its 2025 survey named a lack of granular property-level data as a key barrier, and about half cited unreliable methodologies. The practical conclusion: risk is the combination of "where" (location under current and future climate scenarios) and "what" (how resilient the specific building is to heat, water, and wind).

Start with location under current and forward-looking scenarios for flood, heat, wildfire, and water scarcity.
Then assess the building itself: cooling and ventilation, basement protection, facade and systems condition.
Check municipal adaptation plans and investment in protective infrastructure before committing capital.

A practical screen: how exposed is each asset

What an investor needs is not panic analysis but a repeatable process. Start with questions about your own portfolio: where are the assets, which hazards threaten them over five to thirty years, do the buildings meet future standards, and can the owner keep paying for insurance and financing? The OECD is blunt that resilience is a value driver—physical damage quickly cascades into asset devaluation, loan defaults, and market disruption, while insurance markets face mounting pressure from growing climate losses.

Lenders and insurers are already tightening their rules. Insurers in several markets now require detailed risk assessments as part of underwriting, and bank surveys indicate the weight of climate risk in lending decisions will rise sharply in the next few years, with flood, storm, and heat named the top concerns. For an owner this means pricing climate into acquisition and renovation models, verifying insurance affordability and long-term trends before a deal closes, and checking how a lender treats climate risk in financing terms.

Assess location exposure with current and future climate scenarios during due diligence.
Review portfolio and asset vulnerability, and check lender requirements on climate risk.
Build climate risk into pricing models for acquisitions and renovations, not just into the insurance line.

What owners and investors can actually do

The main lever is forward adaptation rather than reacting to damage. Retrofits that improve energy efficiency and resilience to heat and water—better insulation, modern windows, ventilation and passive cooling, basement protection—simultaneously cut bills, retain tenants, and strengthen your position in insurance negotiations. UK advisers warn against "EPC tunnel vision": optimizing only for the minimum rating ignores market demand and physical impacts, leaving you to pay for two expensive retrofits instead of one holistic one.

For prioritizing, scenario tools such as the Carbon Risk Real Estate Monitor show the year a property is likely to become stranded under decarbonization pathways. Treat any projection as an estimate under assumptions, not a certainty. Cities investing in flood protection generally keep economic losses lower over time, and buildings that demonstrably handle heat and water scarcity retain tenants and premiums longer. Whether to sell a risky asset, retrofit it, or hold depends on your ownership horizon and goals—there is no universal answer, only a well-scoped decision.

Do resilience retrofits that save energy and protect against heat and water in one program.
Use scenario models such as CRREM to identify the year an asset may lose liquidity.
Weigh municipal adaptation and infrastructure spending, since they shape future value.

Limits: data gaps, timing, and jurisdiction

An honest assessment must acknowledge uncertainty. The OECD puts annual global climate-related economic losses in the tens to hundreds of billions of dollars, yet granular property-level data remains the single biggest barrier, methodologies differ, and disclosure rules are fragmented across jurisdictions. Headline figures—billions in lost Florida home value, premiums up a third—are averages built on assumptions, not precise predictions for a specific address.

Jurisdiction matters as much as data. Approaches to insurance, building codes, and risk disclosure differ sharply between countries and even US states; several states now mandate flood-history disclosure at sale, and some have created state-backed insurers of last resort to keep coverage available. Wherever the asset sits, the principle is the same: combine location data, building characteristics, and forward-looking climate scenarios, and remember that insurance and mortgages look only a few years ahead while the risk runs for decades.

Scrutinize the source of any figure: averages hide a wide spread across individual addresses.
Account for local rules—building codes, disclosure duties, and the presence of a government backstop.
Do not rely on the short horizon of an insurance policy or loan: model the asset across 10–30 years.

Put it into practice

Stranded-Asset screening scorecard: 10 questions before you buy or hold

Use this checklist to sort any asset by its stranding risk before a transaction or a hold/sell decision. Answer yes or no; three or more warning answers mean you need a deeper scenario assessment, not panic.

Is the location in mapped flood, wildfire, or extreme-heat zones under current hazard data?
Do forward-looking climate scenarios (10–30 years) make the situation materially worse at this address?
Are insurance premiums rising faster than inflation, or are carriers restricting or exiting coverage here?
Does the building meet future energy-performance rules, or will it need a costly retrofit to stay lettable?
Are tenants or buyers cooling on the asset over climate targets and energy bills?
Does your lender factor climate risk into terms, and could refinancing get harder?
Is the building resilient to heat (ventilation, cooling) and water (basement protection, pumps)?
Is the city investing in protective infrastructure: flood defenses, heat plans, water security?
Have you priced climate into the acquisition model and retrofit budget, not just the premium line?
Do you have a scenario estimate (for example, via CRREM) of when the asset could lose liquidity?

Questions people ask

How does a stranded property asset differ from a building that is simply damaged by a storm?

A stranded asset loses significant value or becomes unusable before the end of its expected economic life—and not necessarily because of direct damage. Its value is eroded by unaffordable insurance premiums, carriers pulling out of the area, tightening energy-performance rules, and tenants leaving. A disaster is only one trigger; stranding usually develops gradually and first shows up as rising premiums and longer time on the market rather than as a single catastrophic loss.

How do I tell whether rising insurance is a real risk signal or just a one-off anomaly?

Compare premium trends with the location's climate exposure. In the US, premiums rose roughly a third in 2020–2023, concentrated in hurricane- and wildfire-prone areas, with reinsurance cost doubling as the main driver. If the increase traces to a persistent reinsurance shock and a genuinely hazardous location—rather than a single tariff change—it is likely to persist and to be capitalized into price. Also check whether carriers are restricting coverage or leaving the market entirely.

Will an energy-efficiency retrofit protect value, or does location decide everything?

Retrofits help, but location is primary: even a superbly insulated building in a flood zone with departing insurers stays under pressure. A resilience retrofit (ventilation, passive cooling, basement protection) cuts bills, retains tenants, and improves your insurance negotiating position, but it does not remove location risk. The smart approach is to assess "where" and "what" separately, then retrofit what is within your control.

Who is most exposed to stranding risk: individual owners, landlords, or institutional funds?

Individual and small owners in high-risk zones are most exposed because they cannot diversify and depend on a single address; research shows premiums weigh more heavily on lower-income households and areas. Institutional investors are vulnerable too, through concentration and disclosure duties, but they have more capacity to diversify, retrofit, and negotiate. Banks and insurers feel the risk through underwriting and lending and are already tightening requirements accordingly.

What should I check before buying a property in a high-hazard area?

Five things: (1) the history and forward-looking scenarios of hazards at the address; (2) the real cost and availability of insurance, including the premium trend; (3) whether the building will meet future energy rules and what retrofit will cost; (4) how your lender treats climate risk in financing terms; and (5) area resilience, meaning municipal flood and heat protection plans. If carriers are already restricting coverage or the property is slow to sell, build a substantial discount into your offer.

How accurate are the value-loss figures reported in studies and the press?

They are average estimates over large samples built on assumptions, not precise forecasts for one address. US research, for example, shows billions of dollars in relative value lost in high-risk zones and premiums up about a third, but the spread across individual properties is enormous. The OECD itself identifies a lack of granular property data and unreliable methodologies as the main barriers to good assessment. Treat the numbers as directional and verify them locally before acting.

Sources and further reading

Sources were checked when this page was generated. Confirm changing dates, rules and prices with the original publisher.

How Higher Property Insurance Premiums Mirror Climate RiskWharton Knowledge (University of Pennsylvania)
Executive summary: Future-Proofing Real Estate InvestmentOECD iLibrary
How climate risk is shaping real estate strategyMunich Re Risk Management Partners
Climate Change, Housing, and Homeowners Insurance in Florida: Lessons for CaliforniaNew America
What are stranded assets in Real Estate - and is your portfolio at risk?Bioregional
What Big Data Says About Rising Home Insurance RatesWharton Magazine (University of Pennsylvania)