Policy and market forces delay real estate price declines on the US coast

Dylan E. McNamara, Martin D. Smith (), Zachary Williams, Sathya Gopalakrishnan and Craig Landry
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Dylan E. McNamara: UNC Wilmington
Martin D. Smith: Duke University
Zachary Williams: UNC Wilmington
Sathya Gopalakrishnan: The Ohio State University

Nature Communications, 2024, vol. 15, issue 1, 1-16

Abstract: Abstract Despite increasing risks from sea-level rise (SLR) and storms, US coastal communities continue to attract relatively high-income residents, and coastal property values continue to rise. To understand this seeming paradox and explore policy responses, we develop the Coastal Home Ownership Model (C-HOM) and analyze the long-term evolution of coastal real estate markets. C-HOM incorporates changing physical attributes of the coast, economic values of these attributes, and dynamic risks associated with storms and flooding. Resident owners, renters, and non-resident investors jointly determine coastal property values and the policy choices that influence the physical evolution of the coast. In the coupled system, we find that subsidies for coastal management, such as beach nourishment, tax advantages for high-income property owners, and stable or increasing property values outside the coastal zone all dampen the effects of SLR on coastal property values. The effects, however, are temporary and only delay precipitous declines as total inundation approaches. By removing subsidies, prices would more accurately reflect risks from SLR but also trigger more coastal gentrification, as relatively high-income owners enter the market and self-finance nourishment. Our results suggest a policy tradeoff between slowing demographic transitions in coastal communities and allowing property markets to adjust smoothly to risks from climate change.

Date: 2024
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DOI: 10.1038/s41467-024-46548-6

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