Short answer: Most homeowners policies list earth movement as an exclusion (Texas Department of Insurance), so cracking from a sinkhole is often not covered unless you add it. Two states write the rules into law. In Florida, every property insurer must cover catastrophic ground cover collapse — an abrupt collapse with a visible depression, structural damage and a government order to vacate — and must offer broader sinkhole loss coverage for extra premium, with optional 1%, 2%, 5% or 10% deductibles (Fla. Stat. 627.706). In Tennessee, insurers selling homeowners coverage must make sinkhole coverage available for optional purchase on request, at inception or later (TN Dept. of Commerce & Insurance). The USGS says the most sinkhole damage tends to occur in Florida, Texas, Alabama, Missouri, Kentucky, Tennessee and Pennsylvania.
Where sinkholes happen
Sinkholes form where the rock under the surface — limestone, other carbonate rock, salt beds, gypsum — can be dissolved by circulating groundwater. Cavities grow until the ground above loses support. Some sinkholes develop slowly and are barely noticeable; cover-collapse sinkholes in clay-rich ground can open over a period of hours (USGS).
The USGS notes there is no national database of sinkhole collapses; some state geological surveys track reports, and many collapses in rural areas go unreported (USGS). It also documents how human activity can trigger them: during a January 2010 freeze, more than 110 sinkholes formed around Dover, Florida, after heavy pumping for crop frost protection drove groundwater to record lows (USGS).
If you live in karst terrain outside Florida or Tennessee, the insurance question is the same: does your policy exclude earth movement, and can you buy it back?
Why a standard homeowners policy usually doesn’t pay
The Texas Department of Insurance’s homeowners guide lists earthquakes or earth movement among the damage most policies don’t cover, and lists damage to foundations or slabs as a separate endorsement many companies offer (TDI). Read the exact exclusion wording in your own policy form: whether it names sinkholes, subsidence or settling decides more than the cause you suspect. Settling and ordinary foundation cracking are a different issue — see does homeowners insurance cover foundation cracks.
Florida: two different coverages
| Catastrophic ground cover collapse (CGCC) | Sinkhole loss coverage | |
|---|---|---|
| Required? | Yes — every authorized property insurer must provide it | Must be made available for an additional premium |
| Trigger | All four: abrupt collapse of ground cover; depression visible to the naked eye; structural damage to the covered building including the foundation; the structure condemned and ordered vacated by the authorized agency | Structural damage to the covered building caused by sinkhole activity, as defined in the statute |
| Excludes | Mere settling or cracking of a foundation, structure or building | Damage that doesn’t meet the statute’s “structural damage” definition |
| Deductible | Per policy | Residential policies may offer 1%, 2%, 5% or 10% of the dwelling limit, with discounts |
Source: Fla. Stat. 627.706. Insurers may require an inspection before adding sinkhole coverage and may limit both coverages to the principal building (627.706(1)). A policy that excludes sinkhole loss must carry a bold 14-point notice telling you that it covers only catastrophic ground cover collapse that leaves the home condemned and uninhabitable, and that sinkhole coverage can be purchased (627.706(3)).
Two-year notice limit. A sinkhole claim — initial, supplemental or reopened — is barred unless notice is given under the policy within 2 years after you knew or reasonably should have known about the loss (627.706(5)).
How a Florida sinkhole claim is investigated and paid
Florida spells out the insurer’s duties in Fla. Stat. 627.707:
- Inspection. The insurer must inspect for structural damage that may come from sinkhole activity.
- Testing. If structural damage exists and the cause is unclear or consistent with sinkhole loss, and sinkhole loss is covered, the insurer engages a professional engineer or geologist at its own cost.
- Written notice to you of what it found, when testing is required, and your right to request testing.
- If denied without testing, you may demand testing in writing within 60 days; you pay 50% of the cost or $2,500, whichever is less, and are reimbursed if sinkhole loss is confirmed.
- If verified, the insurer pays to stabilize the land and building and repair the foundation per its engineer’s recommendations. It may pay only actual cash value (excluding below-foundation work such as grouting or underpinning) until you contract for the repairs. You must sign that repair contract within 90 days of the coverage confirmation, and the insurer pays as work is performed — it may not require you to advance the money.
- Completion. Repairs generally must be finished within 12 months of the contract, with exceptions for agreement, neutral evaluation, appraisal, mediation or litigation.
- No rebates. Accepting a rebate from the repair contractor voids coverage, and offering one is a felony.
The statute also limits nonrenewal based on sinkhole claims if payments didn’t reach policy limits or you completed the engineer’s recommended repairs (627.707(7)).
Tennessee: available on request
Tennessee Code 56-7-130(b) requires every insurer offering homeowner property insurance in the state to make coverage available for insurable sinkhole losses, including contents, though it does not require sinkhole coverage to be built into every policy. The insurer may require an inspection first. The Department of Commerce and Insurance’s 2014 bulletin says insurers may not limit that availability to the start of a policy — you can request it later, too (TN DCI bulletin). The practical takeaway for Tennessee owners: ask in writing whether your policy includes sinkhole coverage, and request a quote for the endorsement if it doesn’t.
Other states
Outside those two statutes, sinkhole protection is a matter of policy form and endorsement. Ask your agent:
- Does my policy exclude earth movement, and does that exclusion mention sinkholes or subsidence?
- Is a sinkhole, collapse or foundation endorsement available, and what deductible applies?
- Does the endorsement cover contents and additional living expenses, or the dwelling only?
- Will the insurer require an inspection or engineering report before adding it?
Your state insurance department can tell you whether your state has a sinkhole-specific statute.
First steps if you suspect a sinkhole
If a depression opens near the house, keep people away and contact local emergency services or your building department before anything else. Then:
- Photograph the ground and the home’s interior and exterior with dates.
- Notify your insurer promptly and ask which coverage applies (sinkhole, CGCC or none).
- Keep receipts if you must move out; additional living expense under Florida sinkhole coverage applies only if there is structural damage caused by sinkhole activity (627.706(2)(j)).
- Get the insurer’s engineering report in writing before agreeing to any repair plan.
Related: landslide and mudflow insurance, home insurance appraisal clause rules, the Florida homeowners insurance guide and the Tennessee homeowners insurance guide.
Frequently asked questions
Does homeowners insurance cover sinkholes?
Usually not without added coverage. Most homeowners policies exclude earth movement, and foundation coverage is often sold as an endorsement (TDI). Florida and Tennessee have specific laws on sinkhole coverage (Fla. Stat. 627.706; TN DCI).
What is catastrophic ground cover collapse in Florida?
Geological activity causing all of the following: an abrupt collapse of the ground cover, a depression clearly visible to the naked eye, structural damage to the covered building including the foundation, and the structure being condemned and ordered vacated. Every Florida property insurer must cover it; mere settling or cracking does not qualify (Fla. Stat. 627.706).
What deductibles apply to Florida sinkhole coverage?
Residential policies may include a sinkhole deductible of 1%, 2%, 5% or 10% of the dwelling limit, with premium discounts for each option (Fla. Stat. 627.706(1)(b)).
How long do I have to report a sinkhole claim in Florida?
Notice must be given under the policy within 2 years after you knew or reasonably should have known about the sinkhole loss; the limit applies to initial, supplemental and reopened claims (Fla. Stat. 627.706(5)).
Can I add sinkhole coverage in Tennessee after my policy starts?
Yes. Tennessee requires insurers offering homeowners coverage to make sinkhole coverage available for optional purchase on request, and the Department says that availability may not be limited to the policy’s inception (TN DCI bulletin).
Which states have the most sinkhole damage?
The USGS says the most damage from sinkholes tends to occur in Florida, Texas, Alabama, Missouri, Kentucky, Tennessee and Pennsylvania, and notes there is no national database of sinkhole collapses (USGS).
Alishahi Insurance · 439 N Canon Dr, Penthouse, Beverly Hills, CA 90210 · (877) 711-4545 · CA License #4348151. General information only. This isn't legal, tax or financial advice or a coverage determination. Coverage depends on policy language and underwriting, and rules vary by state.