Home & Property
Sinkhole Coverage
Coverage for structural damage caused by the sudden collapse of the ground beneath a property into underground cavities.
Last reviewed: May 2026 · Editorial methodology
Definition
Sinkholes form when water dissolves soluble rock (primarily limestone, dolomite, or gypsum) beneath the surface, creating underground voids that can cause sudden ground collapse. Florida has the highest sinkhole activity in the U.S. due to its karst geology, and state law (F.S. §627.706) requires insurers to offer sinkhole coverage (distinct from catastrophic ground cover collapse, which is the baseline legally mandated protection). Standard homeowners policies across most states exclude sinkhole damage; coverage must be added by endorsement or purchased from a specialty carrier. Florida sinkhole claims surged in the 2000s and early 2010s, leading many insurers to exit the market or dramatically raise premiums, especially in Hillsborough, Hernando, Pasco, and Citrus counties — collectively called 'Sinkhole Alley.' Subsidence coverage (for gradual soil settling) is separate from sinkhole coverage and even more broadly excluded. Before purchasing a home in karst terrain, buyers should commission a subsurface investigation report.
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Cover Forge USA Editorial Team
Editorial Lead
This article was researched and written by the Cover Forge USA editorial team against federal sources (NAIC, CMS, FEMA, DOL, SSA, state DOIs) and standard policy forms. Bylines organize content by topic — they do not assert individual licensure. See our editorial-policy for details.
Reviewed 2026-06-14
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