climate, cop26, climate change
During the first nine months of 2021, there were 18 separate billion-dollar weather and climate disaster events across the U.S. that caused $104.8 billion in damages. Credit: NOAA

As climate change fuels large-scale natural disasters, the real estate mantra of “location, location, location” is taking on new meaning. In 2021, homeowners have contended with threats including paralyzing cold on the Great Plains, wildfire evacuations in the West and flooding from the South to New York City and New England.

Buying a house is complicated enough in a market that has become supercharged in many U.S. cities. Emerging climate change risks will further complicate those decisions. Investors will be less likely to regret their decisions if they do due diligence in researching local climate risks. Mortgage lenders will face less risk of borrowers defaulting, and insurers will face fewer losses, if they factor climate risks into decisions on loans and insurance policies.

I study environmental economics, and in my recent book, “Adapting to Climate Change: Markets and the Management of an Uncertain Future”, I explore how the rise of Big Data will help people, firms and local governments make better decisions in the face of climate risks. I see the emergence of a climate risk analysis industry for real estate as a promising development, but believe the federal government should set standards to ensure that it provides reliable, accurate information.

Prices send climate signals, but not everyone listens

Home prices reflect implicit judgments about whether properties are good investments—including the house and the area around it. For example, the current median home value in California is nearly US$720,000—more than twice the national median. This difference reflects a judgment that California offers a desirable climate, lifestyle and job opportunities.

People who buy property in California are betting that the state will continue to be a great place to live in the future. If climate change devastates large portions of it, buyers could regret their investment.

Recent research studying U.S real estate shows that flood risk and fire risk are reflected in current housing prices. Properties that are perceived to be riskier sell for a lower price—but it’s not clear whether these climate price discounts fully compensate buyers for the risks they are exposed to.

Climate change is eroding one of the most vibrant real estate markets in the country—and has quietly been doing so for nearly a decade, according to new research. https://t.co/3pjI0lzDsr

— Hannah Fairfield (@hfairfield) October 12, 2020

Concern about emerging climate risks varies, due partly to the partisan divide. It’s fair to assume that some buyers will be eager to purchase homes in locations that others view as too risky. When people disagree about the probability of a bad outcome, the more optimistic bidder is more likely to purchase the asset.

Climate change is making extreme weather events, such as tropical storms and flooding, more frequent and intense in many places. Will people’s risk perceptions shift along with these changes? Studies show that many people underestimate climate risks to housing.

As Nobel laureate economist George Akerlof has shown, asymmetric information in markets—when sellers know more about a product than buyers—can impede trade. Buyers rightly fear getting stuck with a “lemon,” whether it’s a used car or a house that floods with every big storm.

In the auto market, rating systems like Carfax help level the playing field; in the real estate industry, climate concerns are creating an opportunity for a nascent industry of climate risk screening modelers offering similar service for homebuyers.


Climate change is increasingly affecting home values across the U.S. Not everyone can afford to live in risky areas.

Like Standard & Poor’s but for climate risk

Just as Moody’s and Standard & Poor’s rate private companies’ creditworthiness to help inform investor decisions, a growing set of firms seek to assess spatially refined climate risks, ranging from flooding to extreme heat and wildfire risk. These companies include Climate Check, First Street Foundation, Jupiter Intelligence, Moody’s ESG Solutions Group and RMS.

Climate risk raters use recent natural disasters to compare the geography of recent flood events to what their model predicts. Typically, they combine peer-reviewed research in climatology and hydrology with a climate change model to generate risks maps. First Street Foundation has posted a step-by-step overview of its modeling approach.

Like any emerging industry, spatially refined climate prediction has grown unevenly. Some models are scientifically sound and highly precise, while others are lower quality. In a normal market, consumers would select the winning products through market competition—but for climate risk forecasts, it may take years to assess which offerings are most reliable.

I believe the federal government should play a role in screening the new generation of climate risk products. Regulators could work with the National Science Foundation to create a jury of experts to evaluate the new products.

One way to quality-check these offerings would be to foster a competition in which teams post forecasts about the likely locations of disasters in 2022, and then are ranked early in 2023 based on how well they predicted actual outcomes. This kind of annual review could nudge participants to upgrade their models regularly. One potential example is algorithmic trading competitions in financial markets, in which contestants develop new models to accurately predict how the stock market will respond to large trades.

Saving lives and protecting assets

Climate risk assessment firms could help make the U.S. real estate sector more resilient by helping homebuyers become more sophisticated and realistic property shoppers. Lending patterns will shift as banks offer borrowers less-generous terms for riskier properties. This incentive should nudge people to bid more for relatively safer properties and to seek to live in less risky areas.

Such shifts in turn could nudge changes in local land use and zoning laws to upzone—allow higher-value or denser uses—in relatively safer areas. Building more homes in less risky areas would make climate adaptation more affordable.

Climate change confronts people with fundamental uncertainty. I see developing the skills and infrastructure to better predict local climate risks as a useful strategy for adapting to climate risks. If forecasters can develop trusted predictive models, people will face less future regret about their real estate investments and less risk in their daily lives. Provided by The Conversation

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Citation: A new ratings industry is emerging to help homebuyers assess climate risks (2021, November 24) retrieved 24 November 2021 from https://phys.org/news/2021-11-industry-emerging-homebuyers-climate.html This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.

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