Sinkhole & Earthquake Insurance

Why this matters

Florida has two sinkhole coverages. Most homeowners only have one.

Every standard Florida homeowners policy includes Catastrophic Ground Cover Collapse coverage by law. The trigger for that coverage is narrow: it requires sudden, visible ground collapse, structural damage to the building, and the home being formally condemned. The broader protection most homeowners actually want, Sinkhole Loss Coverage, is an optional endorsement that responds to structural damage from sinkhole activity even when those four specific conditions aren't all met. Earthquake coverage is a separate endorsement available in both states, inexpensive given the relatively low seismic risk in Florida and Georgia.

Whether you're considering adding sinkhole coverage to an existing homeowners policy, weighing whether earthquake makes sense for a higher-value home, or trying to understand exactly what the legally required Catastrophic Ground Cover Collapse actually pays for, we'll walk through both coverages and explain where the deductibles and claim-verification requirements come into play.

What's covered

What earthquake and sinkhole coverage includes.

Catastrophic Ground Cover Collapse (CGCC)

Required by Florida law in every standard homeowners policy. Covers sudden, visible ground collapse causing structural damage and condemnation of the home. The narrow legal floor.

Sinkhole Loss Coverage

Optional Florida endorsement for broader sinkhole protection. Covers structural damage caused by sinkhole activity even without total collapse. The more useful real-world protection.

Earthquake damage to dwelling

Earthquake endorsement covers damage to the home structure from earthquake and earth movement events. Subject to its own deductible, typically a percentage of dwelling coverage.

Personal property from earthquake

Earthquake endorsements typically include coverage for personal property damaged by the earthquake event, subject to your existing personal property limit.

Geological investigation costs

When a sinkhole claim is filed, the carrier typically pays for the initial professional engineering and geological investigation required to verify the cause.

Foundation and structural repair

When sinkhole activity is confirmed and Sinkhole Loss Coverage applies, the policy pays for structural repairs and foundation stabilization needed to restore the dwelling.

Gaps

What earthquake and sinkhole coverage doesn't cover.

Cosmetic damage without structural impact

Hairline cracks in drywall, minor settling, and similar cosmetic effects that don't compromise the building's structural integrity are typically not covered by sinkhole or earthquake policies.

Pre-existing damage

Damage that existed before the policy was bound, or damage from prior sinkhole or earth movement events, is not covered. Carriers underwrite around prior claims on the property.

Damage from causes other than sinkhole or earthquake

Settlement from poor construction, expansive soils, drainage issues, tree roots, and similar non-sinkhole causes are not covered. Verification investigations specifically distinguish sinkhole activity from these causes.

Pavement, pools, and detached structures (typical)

Standard sinkhole policies focus on the main dwelling. Damage to swimming pools, driveways, sidewalks, and detached structures is typically not included unless specifically endorsed.

Flood, hurricane, and other excluded perils

Earthquake and sinkhole coverages address only their specific perils. Flood, hurricane, wind, and other excluded events need their own coverages.

Damage below the deductible

Sinkhole deductibles are typically high (often 10% of Coverage A). Damage that doesn't exceed the deductible is paid out of pocket by the homeowner, even when the cause is verified.

State knowledge

What to know about sinkhole and earthquake coverage in Florida and Georgia.

Florida

CGCC required by law Sinkhole Loss Coverage optional Higher risk in Central FL

Florida law requires every standard homeowners policy to include Catastrophic Ground Cover Collapse coverage and to offer Sinkhole Loss Coverage as an option to the policyholder. The two coverages address different levels of sinkhole activity: CGCC is the narrow legal trigger requiring abrupt collapse, visible depression, structural damage, and condemnation; Sinkhole Loss Coverage is the broader optional protection for structural damage from sinkhole activity. Central Florida (Hernando, Pasco, and Hillsborough counties especially) has historically reported the highest sinkhole claim frequency, but the underlying geology (limestone karst) extends across much of the state including parts of the northeast. Earthquake is a low-risk peril in Florida but available as an endorsement.

Georgia

Lower seismic risk Sinkholes less common Endorsements available

Georgia is a relatively low-risk state for both earthquakes and sinkholes compared with the West Coast or Central Florida. Earthquake endorsements are available from most carriers as a low-cost option, and sinkhole coverage is occasionally added for properties in specific geological areas. Most Georgia homeowners don't need either coverage, but the cost of adding earthquake is low enough that some homeowners include it for completeness. We write coverage in both states from our offices in Saint Augustine and Saint Johns.

Limits

Coverage limits to consider.

The fundamental decision on the sinkhole side is whether to add Sinkhole Loss Coverage on top of the legally required Catastrophic Ground Cover Collapse coverage. CGCC is included automatically in every Florida homeowners policy at no separate cost, but the trigger is narrow enough that many sinkhole-related claims don't qualify. Sinkhole Loss Coverage costs an additional premium and carries a significantly higher deductible (often 10% of Coverage A), but covers structural damage from sinkhole activity that doesn't meet the strict CGCC criteria.

Coverage A on the sinkhole endorsement typically matches the dwelling coverage on the main homeowners policy. Higher-value homes have proportionally higher exposure but also higher available coverage. The deductible structure means smaller sinkhole repairs may fall entirely below the deductible threshold, which is part of why sinkhole coverage tends to be cost-effective primarily for larger structural events.

Earthquake endorsements typically work as a separate add-on with their own deductible (often a percentage of dwelling coverage). Premium in Florida and Georgia is generally low given the relatively low seismic risk. The trade-off is between paying a small annual premium for protection against a low-probability event versus accepting the risk yourself.

Carrier availability varies for both coverages. Some carriers no longer offer Sinkhole Loss Coverage even in Florida due to claim history; others offer it only in lower-risk counties or with additional underwriting. Earthquake endorsements are more widely available but pricing varies. We compare what's available on your specific property and existing homeowners carrier.

Required, narrow trigger

CGCC

Catastrophic Ground Cover Collapse is included by Florida law in every homeowners policy. Triggers only when all four conditions are met: collapse, visible depression, structural damage, condemnation.

Optional, broader trigger

Sinkhole Loss

Sinkhole Loss Coverage is an optional Florida endorsement. Covers structural damage from sinkhole activity even without total collapse. Higher deductible (often 10% of Coverage A).

Common scenarios

Situations that change your sinkhole or earthquake coverage.

Buying a home in a higher-risk sinkhole county

For homes in Hernando, Pasco, Hillsborough, or other higher-risk areas, adding Sinkhole Loss Coverage is worth more careful evaluation. We can quote with and without the endorsement.

Suspicious cracking or settling

Visible cracks in walls, doors that won't close properly, or noticeable floor slope can indicate ground movement. Document the issue and contact us before assuming it's a sinkhole claim.

Lender requiring geological testing

Some lenders require sinkhole investigation before closing in higher-risk areas. We help coordinate with the carrier and lender on what testing is required and how it affects coverage.

After a major hurricane or storm

Heavy rainfall can saturate ground and trigger sinkhole activity or expose pre-existing conditions. Post-storm inspection of foundation and structural elements is worth the time.

Adding earthquake to a higher-value home

For higher-value properties, earthquake's small premium relative to dwelling coverage often makes adding it an easy decision. We quote it as part of any homeowners review.

Moving from a high-risk area

Owners moving from California, the Pacific Northwest, or Puerto Rico often want earthquake coverage out of habit. In Florida and Georgia it's available and inexpensive, even if the underlying risk is lower.

Premium and pricing

What goes into your earthquake or sinkhole premium.

What affects your premium

Sinkhole Loss Coverage pricing in Florida depends primarily on the county and the property's specific location. Higher-risk counties (Hernando, Pasco, Hillsborough especially) face higher pricing and more restrictive availability than lower-risk areas. The property's age, construction type, prior claims history, and proximity to known sinkhole activity also factor in. Some carriers don't write sinkhole coverage at all in certain counties; others do but with additional underwriting requirements.

Earthquake endorsement pricing in Florida and Georgia is generally low because both states are relatively low-risk for seismic events. The dwelling value drives most of the premium, with adjustments for construction type and foundation. Earthquake deductibles are typically percentage-based (often 5% to 15% of dwelling coverage), which keeps premium low but means significant out-of-pocket cost if a claim happens.

Both coverages are typically added as endorsements to your existing homeowners policy with the same carrier. Some carriers don't offer one or both and the only option is a separate endorsement through a different carrier or a specialty market. We confirm what's available on your specific homeowners and quote accordingly.

Pricing considerations

Earthquake and sinkhole coverage pricing don't work like typical insurance discounts. The pricing is driven more by risk factors than by behavioral or bundling discounts.

Property location and county

Sinkhole pricing varies significantly by county. Earthquake pricing varies less but is still tied to seismic risk zones documented by USGS.

Deductible selection

Higher deductibles (often 10% to 15% of Coverage A) reduce premium meaningfully. The deductible is one of the few levers homeowners can use to manage premium on these endorsements.

Construction type

Masonry, concrete block, and frame construction rate differently. Foundation type (slab, stem wall, raised) also factors in for both earthquake and sinkhole pricing.

Same-carrier endorsement

Adding these coverages to your existing homeowners policy with the same carrier is typically the most efficient option, both for pricing and for claims handling continuity.

Standard insurance discounts (multi-policy, paid-in-full, autopay) apply on the underlying homeowners policy, not separately on the sinkhole or earthquake endorsement. We size each coverage to actual exposure rather than maximizing discount stacking.

Decisions

When you actually need each coverage.

01

Do I need Sinkhole Loss Coverage on top of CGCC?

For properties in higher-risk Central Florida counties, yes, almost without exception. For properties in lower-risk areas (including most of Saint Johns County), it depends on how you weigh the small probability of a major sinkhole event against the added premium and high deductible. The CGCC alone has a narrow trigger that many sinkhole losses won't meet, so adding Sinkhole Loss Coverage closes that gap if the cost is acceptable.

02

Is earthquake insurance worth it in Florida or Georgia?

Earthquake premiums in Florida and Georgia are typically low because the seismic risk is low. For most homeowners the answer is personal preference: if a low-cost endorsement provides peace of mind for a low-probability event, it's worth adding. For higher-value homes the marginal cost is small relative to the protection.

03

Endorsement on my homeowners policy, or standalone?

When the same carrier writes both, an endorsement on the existing homeowners is almost always the right answer. It keeps renewal dates aligned, simplifies claims, and usually prices better than a standalone policy through a separate carrier. Standalone is the answer when your homeowners carrier doesn't offer the coverage at all.

04

What deductible should I choose?

Sinkhole and earthquake deductibles are typically percentage-based (often 10% of Coverage A for sinkhole, 5% to 15% for earthquake). The higher the deductible, the lower the premium. For coverages designed to address rare but severe events, the standard advice is to size the deductible to what you could absorb if the event happened tomorrow, then optimize premium against that. Smaller damage below the deductible is the homeowner's responsibility regardless.

Carriers

Carriers we work with for sinkhole and earthquake coverage.

We write sinkhole and earthquake coverage through the carriers that offer it on the homeowners side, since these coverages are almost always added as endorsements to an existing homeowners policy. The right fit depends on your existing homeowners carrier, the property's county and location, and whether your current carrier offers both coverages or only one.

Sinkhole availability is more variable than earthquake. Some carriers no longer write sinkhole coverage in certain Florida counties due to claim history; others write it with additional underwriting requirements. We confirm what's available on your specific property before recommending whether to add either coverage.

Citizens

Tower Hill

American Integrity

Slide

Carrier appointments vary by line and state. Sinkhole and earthquake endorsement availability depends on the underlying homeowners carrier, the property's location, and underwriting eligibility. Not every carrier offers sinkhole coverage in every Florida county.

Questions

Sinkhole and earthquake questions we hear a lot.

Does my homeowners insurance cover sinkholes in Florida?

Partially. Florida law requires every standard homeowners policy to include Catastrophic Ground Cover Collapse (CGCC) coverage, but the definition is narrow and only triggers when very specific conditions are met (visible ground depression, structural damage, and the home being condemned). Broader sinkhole protection (Sinkhole Loss Coverage) is an optional endorsement and is required by Florida law to be offered to homeowners, not automatically included. The two are different products that respond to different levels of sinkhole activity.

What's the difference between Catastrophic Ground Cover Collapse and Sinkhole Loss Coverage?

Catastrophic Ground Cover Collapse (CGCC) is mandatory in every Florida homeowners policy and triggers only when all four conditions are met: abrupt collapse of the ground cover, depression in ground cover clearly visible to the naked eye, structural damage to the building including the foundation, and the structure being condemned and ordered to be vacated. Sinkhole Loss Coverage is an optional endorsement that covers structural damage from sinkhole activity even without total collapse. CGCC is the narrow legal floor; Sinkhole Loss Coverage is the broader practical protection.

Do I need earthquake insurance in Florida or Georgia?

Florida and Georgia are low earthquake-risk states relative to the West Coast. Earthquake coverage is available as an endorsement to most homeowners policies and is typically inexpensive given the low risk. It's worth considering for higher-value properties, properties near known fault systems, or owners who want full protection regardless of risk level. For most properties, it's a small line item that closes a known coverage gap.

How does sinkhole coverage work?

When a homeowner suspects sinkhole damage, the claim process typically requires a geological investigation by a qualified professional engineer or geologist to confirm that sinkhole activity is the cause. If confirmed, coverage applies to structural repairs. Sinkhole policies in Florida often carry a higher deductible (commonly 10% of Coverage A), and there are specific procedural rules under Florida law (F.S. 627.706 and related statutes) about how claims are investigated and paid.

What is "Sinkhole Alley" and am I in it?

"Sinkhole Alley" is an informal name for the Central Florida counties (primarily Hernando, Pasco, and Hillsborough) that have historically reported the highest sinkhole claim frequency. The geological conditions that cause sinkholes (limestone karst topography) exist across much of Florida, including parts of the northeast where Saint Johns County sits, but the highest-risk areas remain concentrated in Central Florida. Carrier underwriting often reflects the higher claim frequency in those counties with different pricing and availability.

How is a sinkhole claim verified?

Sinkhole claims in Florida follow a specific verification process. The carrier typically retains a qualified professional engineer or geologist to investigate, including soil testing, depth analysis, and review of structural damage. The investigation determines whether sinkhole activity is the cause of the damage versus other causes (settlement, expansive soils, drainage issues). If confirmed, the claim is paid; if not, the claim is denied. The investigation process is rigorous and can take time.

What does the geological investigation cost?

When a claim is filed, the carrier typically bears the cost of the initial sinkhole investigation under Florida law. If the homeowner disputes a denied claim, they may need to retain their own engineer at their own cost. Costs for independent investigations vary based on property size and complexity. We help walk through the process if you're considering filing a sinkhole claim.

What's the typical sinkhole deductible?

Sinkhole Loss Coverage deductibles in Florida are commonly set at 10% of Coverage A, separate from the standard all-perils deductible. On a $300,000 dwelling, that's $30,000 out of pocket before sinkhole coverage responds. The high deductible reflects the cost and severity of sinkhole claims and is one of the trade-offs in deciding whether to add the optional coverage.

Does sinkhole coverage include cosmetic damage?

Generally no. Sinkhole coverage is designed to address structural damage caused by sinkhole activity. Cosmetic damage (small cracks in drywall, minor settling) that doesn't affect the building's structural integrity is typically not covered. The investigation distinguishes between structural and cosmetic effects.

What about damage to my swimming pool or pavement?

Sinkhole damage to swimming pools, driveways, sidewalks, and pavement is typically not covered under standard sinkhole policies, which focus on the dwelling structure. Some carriers offer broader endorsements that include other structures, and some pool coverage is part of the dwelling's other-structures coverage subject to separate sublimits. We'll confirm what your specific policy includes.

Can I add sinkhole coverage to a Citizens policy?

Citizens Property Insurance offers Sinkhole Loss Coverage as an optional endorsement on its homeowners policies in Florida. Availability and pricing depend on the property's location, age, and prior claims history. For homes in higher-risk sinkhole counties, Citizens sometimes requires additional underwriting before adding the coverage.

How does earthquake insurance work?

Earthquake coverage is typically added as an endorsement to a homeowners policy or written as a standalone policy. It pays for damage to the dwelling and contents caused by earthquake or earth movement, subject to a deductible (often a percentage of dwelling coverage rather than a flat amount). In Florida and Georgia, earthquake premiums are usually low given the relatively low seismic risk.

Can I bundle these with my home insurance?

Yes. Sinkhole Loss Coverage and earthquake coverage are typically added as endorsements to your existing homeowners policy with the same carrier, which keeps renewal and claims handling simpler. Some carriers don't offer one or both of these coverages, in which case the only option is a separate endorsement or specialty policy. We confirm what's available on your specific homeowners policy.

How fast can I get an earthquake or sinkhole insurance quote?

Most earthquake and sinkhole endorsements can be quoted the same day. Carriers ask for the property address, year built, construction type, prior insurance history, and any prior sinkhole or earth-movement claims on the property. Properties in higher-risk sinkhole counties may require additional underwriting and sometimes inspections before binding.

Ready to compare your sinkhole or earthquake coverage?

Send us your current declarations page, give us a call, or request a free quote. We'll review what you already have, confirm what your existing policy includes, and walk you through the options.

Get a Free Quote Call 904-777-3133

Earthquake & Sinkhole Insurance in Florida and Georgia