What Is a Natural Hazard Disclosure?
California Civil Code §1103 requires sellers to tell buyers whether a property sits in a mapped natural hazard zone. That requirement is called the natural hazard disclosure — and it applies to nearly every residential sale in the state.
The natural hazard disclosure requirement
A natural hazard disclosure is a California legal requirement that sellers of residential property (one-to-four units) inform buyers about hazard zone exposure before title transfers. Codified in Civil Code §1103–§1103.14, the requirement covers six categories of officially mapped natural hazard zones.
The disclosure takes the form of the Natural Hazard Disclosure Statement (NHDS) — a signed document the seller delivers to the buyer. In practice, a third-party NHD report provides the hazard zone determinations that populate the statement. When the seller relies in good faith on an expert report, the expert — not the seller or agent — is responsible for the accuracy of the determinations. That safe harbor is the practical reason nearly every California transaction includes a professional NHD report.
The six statutory hazard zones
The natural hazard disclosure covers exactly six categories of government-mapped zones. For each one, the disclosure must state whether the property is inside the mapped zone.
| Hazard zone | Mapped by | What it means |
|---|---|---|
| Special Flood Hazard Area (Zone A/V) | FEMA | Flood insurance typically required by lenders |
| Dam Inundation Zone | CA Division of Safety of Dams | Area that would flood if a dam failed |
| Very High Fire Hazard Severity Zone | CAL FIRE | Highest wildfire risk; defensible space required |
| Wildland / State Responsibility Area | CAL FIRE | State bears fire suppression responsibility |
| Earthquake Fault Zone (Alquist-Priolo) | CGS | Property near an active fault; surface rupture risk |
| Seismic Hazard Zone | CGS | Liquefaction or earthquake-induced landslide risk |
Many NHD providers, including Verity NHD, screen additional environmental databases — GeoTracker, EnviroStor, EPA Superfund, and CalGEM — beyond the six statutory zones, giving the buyer a broader picture of the property's environmental exposure.
Who must provide the disclosure — and when
The seller carries the disclosure obligation. The seller's agent has a duty to ensure the disclosure is delivered, and the buyer's agent should verify it was received. Neither agent is personally liable for the accuracy of the hazard determinations when a professional NHD report is used — that liability rests with the expert who prepared the report.
- Best practice: order the NHD report at listing so it is available during the offer period.
- Legal requirement: the disclosure must be delivered to the buyer as soon as practicable before transfer of title.
- Rescission window: if the disclosure is delivered after the buyer's offer is accepted, the buyer generally has three days (five days if mailed) to rescind.
What happens without the disclosure
Failing to deliver a natural hazard disclosure can expose the seller to rescission claims and civil liability for damages. The listing agent may face DRE discipline for allowing a transaction to close without a required disclosure. The cost of an NHD report — typically $54 to $100 — is trivial compared to the liability of skipping it.
How to satisfy the requirement
Order a professional NHD report from a licensed provider. The report will check the property address against every government hazard map, state whether the property is inside each zone, and provide a signed Natural Hazard Disclosure Statement ready for the seller and buyer to execute. Verity NHD reports generate in about 60 seconds, include built-in eSignature, and deliver in English and Spanish.
You can run a free hazard check on any California address to see a preliminary screen before ordering the full report.
Frequently asked questions
What is a natural hazard disclosure?
A natural hazard disclosure is a California legal requirement under Civil Code §1103 that sellers of residential property inform buyers whether the property sits inside any of six mapped natural hazard zones — flood, dam inundation, fire, wildland fire area, earthquake fault, and seismic hazard zones.
Who is required to provide a natural hazard disclosure?
The seller (transferor) of most residential properties of one-to-four units in California must provide the disclosure. The seller's agent has a duty to ensure the disclosure is delivered, though the disclosure obligation belongs to the seller.
When must the natural hazard disclosure be delivered?
The disclosure must be delivered to the buyer as soon as practicable before transfer of title. Best practice is to have the NHD report completed at or before listing, so it is available to all prospective buyers during the offer period.
What happens if the seller does not provide a natural hazard disclosure?
The buyer may have the right to rescind (cancel) the transaction within a specified period after receiving the disclosure or, if the disclosure is never delivered, potentially after close of escrow. The seller and agent may also face civil liability for damages caused by the failure to disclose.
Is a natural hazard disclosure the same as a home inspection?
No. A natural hazard disclosure identifies whether a property is in a government-mapped hazard zone. A home inspection examines the physical condition of the structure. Both are important, but they cover completely different ground. Read more about the differences in our NHD report vs. home inspection guide.
Bottom Line
A natural hazard disclosure is not a suggestion — it is a California statutory requirement that applies to nearly every residential sale. The professional NHD report is the fastest, safest way to satisfy it: it provides the hazard determinations, the statutory safe harbor, and a signed disclosure document in one step.
Keep reading
What Does NHD Stand For?
NHD stands for Natural Hazard Disclosure — here is what the acronym means and how the report works.
Read moreCalifornia Real Estate Disclosure Requirements
Every disclosure a California seller owes, from the TDS to Mello-Roos.
Read moreWho Pays for the NHD Report?
The seller usually pays, but the purchase agreement controls.
Read moreWho Orders the NHD Report?
The listing agent usually places the order — here is when and how.
Read moreWhat Is a Natural Hazard Disclosure Report?
The full guide to what the report covers and how it is produced.
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