Quick answer: Standard homeowners policies exclude earth movement, which usually includes sinkholes. In Florida, state law requires insurers to include catastrophic ground cover collapse coverage, but that covers only a sudden collapse that leaves the home condemned and ordered vacated. Broader sinkhole loss coverage, which pays for structural damage from sinkhole activity, is optional and costs extra. Florida sinkhole claims follow specific testing, repair and reporting rules, including a two-year deadline to report a loss. Outside Florida, homeowners in karst areas can sometimes add a sinkhole endorsement.
Sinkholes form when water dissolves soluble rock such as limestone beneath the ground, leaving voids that the soil above can slowly settle into or suddenly collapse into. The U.S. Geological Survey (USGS) estimates that about 20 percent of the land in the United States is susceptible to sinkholes, and it identifies Florida, Texas, Alabama, Missouri, Kentucky, Tennessee and Pennsylvania as states where the most damage occurs.
Because sinkhole repairs can involve foundation stabilization that costs far more than cosmetic fixes, the coverage details matter. This article explains how standard policies treat sinkholes, how Florida’s law works and what to do if you suspect sinkhole damage. For the policy basics, see our homeowners insurance guide.
Sources: Florida Statutes sections 627.706, 627.7073 (sinkhole reports and seller disclosure) (sinkhole insurance and catastrophic ground cover collapse), 627.7072 (testing standards for sinkholes) and 627.7074 (alternative procedure for resolution of disputed sinkhole claims, neutral evaluation); Florida Department of Financial Services and Florida Office of Insurance Regulation consumer guidance; U.S. Geological Survey (USGS) sinkhole and karst information; Insurance Services Office (ISO) homeowners policy earth movement exclusion as summarized by the Insurance Information Institute (Triple-I). Laws and policy terms change; confirm with your insurer and state regulator. This is general information, not insurance or legal advice.
Why Standard Policies Exclude Sinkholes
Most homeowners policies, including the widely used ISO HO-3 form, contain an earth movement exclusion. It typically excludes damage caused by earthquakes, landslides, mudflows, subsidence and sinkholes, along with the sinking, rising or shifting of the ground. The same exclusion is why earthquake damage requires separate coverage, as our guide to earthquake insurance explains.
Some policies cover certain resulting losses. For example, if earth movement causes a fire, the fire damage may be covered. But damage to the home from the ground itself sinking is usually excluded unless the policy adds sinkhole coverage.
Florida: Two Different Coverages
Florida has the most detailed sinkhole insurance law in the country, in section 627.706 of the Florida Statutes. It separates two kinds of coverage.
| Coverage | Required? | What it covers |
|---|---|---|
| Catastrophic ground cover collapse | Included in every Florida homeowners policy | A sudden collapse meeting all four legal conditions |
| Sinkhole loss | Insurer must make it available; policyholder pays extra | Structural damage to the building, including the foundation, caused by sinkhole activity |
Catastrophic Ground Cover Collapse
Under Florida law, catastrophic ground cover collapse means geological activity that results in all of the following:
- The abrupt collapse of the ground cover
- A depression in the ground cover clearly visible to the naked eye
- Structural damage to the covered building, including the foundation
- The insured structure being condemned and ordered to be vacated by the governmental agency authorized by law to issue such an order
All four conditions must be met. Cracks, settling or gradual sinking, even serious ones, usually do not qualify unless the home is condemned. That narrow definition surprises many homeowners who assume their basic policy covers sinkholes.
Sinkhole Loss Coverage
Sinkhole loss coverage is broader. Florida law defines a sinkhole loss as structural damage to the covered building, including the foundation, caused by sinkhole activity. Structural damage has its own legal definition, which generally involves significant damage to the foundation or load-bearing components, such as movement or cracking beyond certain thresholds or damage that makes the building unsafe.
Insurers must make sinkhole loss coverage available for an additional premium, but they may require an inspection before offering it, and they can decline to offer it if the inspection finds problems. Premiums are often higher in west-central Florida counties where sinkhole claims have been most common.
How Florida Sinkhole Claims Work
Florida’s sinkhole claim process has several steps set by statute:
- Report the claim promptly. Under section 627.706, a sinkhole claim must be reported to the insurer within two years after the policyholder knew or reasonably should have known about the sinkhole loss.
- Insurer inspection. The insurer inspects the property to decide whether there is structural damage that may be from sinkhole activity.
- Testing. If the insurer finds structural damage and cannot rule out sinkhole activity, it must order testing by a professional engineer or professional geologist under the standards in section 627.7072. The testing determines whether sinkhole activity caused the damage and what repairs are needed.
- Repair recommendations. If the claim is covered, the engineer or geologist recommends methods to stabilize the land and building, such as grouting or underpinning, and to repair the foundation.
- Payment. Florida law allows the insurer to pay actual cash value of the damage at first and to pay the remaining amounts as the policyholder enters into a contract to perform the recommended repairs and as work progresses. Policy proceeds generally must be used for the recommended stabilization and repairs.
Our guide to replacement cost vs. actual cash value explains why that first payment may be lower than the full cost.
Common Sinkhole Repair Methods
Engineers choose repairs based on testing results, the depth of the problem and the condition of the home. Common methods include:
| Method | How it works | Typical use |
|---|---|---|
| Compaction grouting | Thick grout is pumped deep into the ground to fill voids and densify loose soil | Stabilizing the subsurface beneath and around the home |
| Chemical grouting | Low-viscosity grout or resin is injected into shallow soils | Sealing and strengthening soils just under the foundation |
| Underpinning | Steel piers are driven or screwed down to stable soil or rock and attached to the foundation | Supporting and sometimes lifting a settled foundation |
| Foundation and structural repair | Cracks are repaired, slabs leveled and walls fixed | After the ground has been stabilized |
Stabilization comes first, then cosmetic and structural repairs. That order is why Florida’s law ties payment to the recommended stabilization work. Ask for written warranties on stabilization work and keep all engineering reports, since future buyers and insurers may ask for them.
Neutral Evaluation for Disputes
If the homeowner and insurer disagree about whether a sinkhole caused the damage or what repairs are needed, Florida offers neutral evaluation under section 627.7074. The Florida Department of Financial Services administers the program, and a neutral evaluator, a qualified engineer or geologist, reviews the claim. The process is meant to resolve disputes without litigation. Either party can request it once testing is complete, and the insurer typically pays the evaluator’s fee.
Signs of Possible Sinkhole Activity
Many sinkhole issues show up gradually rather than as a sudden hole. Florida’s consumer guidance and the USGS list warning signs such as:
- New cracks in interior walls, floors or the foundation
- Doors and windows that suddenly stick or do not close
- Cracks in driveways, sidewalks or pool decks
- Circular depressions or ponding in the yard
- Trees or fence posts that tilt
- Exposed foundation or soil pulling away from the home
These signs can also come from ordinary settling, expansive clay soils, tree roots or poor construction. Only testing can confirm sinkhole activity. A structural engineer can often tell you whether cracks look like typical settling, and a home inspector can help track changes over time, but neither replaces the testing an insurer orders for a claim. Document what you see with dated photos, since it helps with the two-year reporting deadline.
What to Do if You Suspect a Sinkhole
- Stay safe. If a hole opens suddenly or the home shows major structural movement, leave and call 911 or local emergency management.
- Mark off the area and keep children and pets away.
- Take photos and notes of cracks and changes, with dates.
- Review your policy for catastrophic ground cover collapse and sinkhole loss coverage.
- Report the claim to your insurer within the deadline.
- Avoid repairs that cover up evidence until the insurer has inspected, except for necessary steps to prevent further damage.
Our guide on filing a homeowners insurance claim walks through the general process.
Sinkhole Coverage Outside Florida
Outside Florida, sinkhole coverage depends on the insurer and the state. Some states with significant karst, such as Tennessee, have laws requiring insurers to offer sinkhole coverage, and some insurers in other karst states offer a sinkhole endorsement. Others do not offer it at all. Ask your insurer:
- Does my policy exclude sinkholes under the earth movement exclusion?
- Is a sinkhole endorsement available, and what does it cost?
- Does the endorsement cover gradual settlement, or only sudden collapse?
- Is there a separate deductible for sinkhole claims?
- Does coverage extend to other structures, such as a pool or detached garage?
The USGS publishes maps of karst areas that can help you judge whether your area is susceptible.
How Much Coverage Is Enough
Sinkhole repairs can involve more than cosmetic fixes. Stabilization methods such as grouting and underpinning, along with foundation repair and interior damage, can add up quickly. Make sure your dwelling limit reflects the full cost to rebuild, since sinkhole coverage pays up to that limit. Our guide on how much dwelling coverage you need explains how to estimate it.
Florida homeowners should also look at their deductibles. Policies may carry separate hurricane deductibles, and some sinkhole coverages use their own deductible. Our article on hurricane and wind/hail deductibles explains percentage deductibles, which work similarly.
Buying a Home in Sinkhole Country
If you are buying a home in a known sinkhole area:
- Ask the seller about past sinkhole claims, testing and repairs. When testing confirms sinkhole activity, section 627.7073 requires the insurer to file the engineering report with the county clerk, where it becomes a public record. A seller who received a sinkhole claim payment that was not used to fully repair the damage must disclose that to buyers.
- Ask for engineering reports if repairs were made, including the stabilization method and any warranties.
- Get insurance quotes before closing, since some insurers may decline or limit coverage for homes with prior sinkhole activity.
- Consider an independent inspection by a geotechnical professional if you see warning signs.
Common Misunderstandings
- “My Florida policy covers sinkholes.” It covers catastrophic ground cover collapse, which is narrow. Full sinkhole loss coverage is optional.
- “Any crack is a sinkhole.” Many cracks come from settling or other causes. Testing determines the cause.
- “I can report it whenever.” Florida has a two-year deadline from when you knew or should have known.
- “The check is mine to spend.” In Florida, sinkhole payments generally must be used for the recommended stabilization and repairs.
Frequently Asked Questions
Does homeowners insurance cover sinkholes?
Usually not, because standard policies exclude earth movement. Some states and insurers offer sinkhole coverage as an endorsement or separate option.
What is catastrophic ground cover collapse?
A Florida coverage required in every homeowners policy that pays for a sudden collapse with a visible depression, structural damage and an order to vacate the home from a government agency.
How long do I have to report a sinkhole claim in Florida?
Two years after you knew or reasonably should have known about the sinkhole loss, under section 627.706.
Who tests for sinkholes in a Florida claim?
A professional engineer or professional geologist hired by the insurer, under the testing standards in section 627.7072.
Can I get sinkhole coverage after damage appears?
Usually not for existing damage. Insurers may require an inspection before adding coverage and typically will not cover damage that started before the coverage began.
The Bottom Line
Sinkholes are excluded from most homeowners policies unless you add coverage. In Florida, the coverage every policy includes applies only to catastrophic collapses that leave the home condemned, so homeowners in sinkhole-prone areas should ask about full sinkhole loss coverage. Watch for warning signs, document changes and report a suspected sinkhole claim within the deadline.
