The Natural Hazard Disclosure (NHD) tells you whether a California home sits inside one of the state's mapped flood, fire, or earthquake hazard zones — before you commit your money.
What the NHD is and why it exists
The Natural Hazard Disclosure Statement is a one-page statutory form required by California Civil Code Section 1103 et seq. for most residential sales of one-to-four units. Its job is narrow but important: to tell a buyer whether the property falls inside specific government-mapped hazard areas so the buyer can decide whether to investigate, buy hazard insurance, or walk.
Because checking the official maps is technical work, sellers and agents almost always order an NHD report from a qualified third-party company (a disclosure firm, licensed engineer, surveyor, or geologist). Statute lets the seller and agent rely in good faith on that expert report.
The six statutory hazard zones
The NHD reports a Yes/No for each of these six zones defined in Civil Code 1103.2:
- Special Flood Hazard Area (SFHA) — a FEMA-mapped 100-year flood zone (any Zone "A" or "V"). Being inside one typically triggers a lender requirement for flood insurance.
- Dam inundation area — an area that would flood if an upstream dam failed, shown on state-approved inundation maps.
- Very High Fire Hazard Severity Zone (VHFHSZ) — a local-responsibility area mapped by CAL FIRE / the Office of the State Fire Marshal as very high wildfire risk.
- Wildland area / State Responsibility Area (SRA) — land where the State of California has primary financial responsibility for wildfire protection; owners may owe extra fire-prevention duties.
- Earthquake Fault Zone (Alquist-Priolo) — a zone mapped along an active surface-rupture fault trace under the Alquist-Priolo Earthquake Fault Zoning Act.
- Seismic Hazard Zone — an area mapped as subject to strong ground shaking, liquefaction, or earthquake-induced landslide under the Seismic Hazards Mapping Act.
Airport influence and noise
Beyond the six core hazards, many NHD reports and related disclosures also note whether a home sits within an airport influence area or an airport noise / overflight zone. California law requires sellers to disclose if a property is within an airport influence area, because aircraft noise and operations can affect everyday living and resale. Always read the airport section of your report.
Who provides it, who pays, and what it does NOT promise
The seller is legally responsible for delivering the NHD, but in practice the seller's side orders a third-party report and both seller and listing agent sign it. The buyer's agent usually signs to acknowledge receipt. Who pays for the report is negotiable and is commonly addressed in the purchase agreement.
Crucially, the NHD only reports zone status as of the map data used. It does not say the home will flood, burn, or shake — nor does it promise it won't. It is not an insurance quote, an inspection, or a guarantee of safety.
Your rights and next steps as a buyer
Use the NHD as a launch point, not a finish line:
- If a flood or fire zone is flagged, get an insurance quote early — premiums and availability can change your budget or even your loan.
- Ask whether your purchase agreement gives you a disclosure/inspection contingency window to review the NHD and cancel if the risk is unacceptable.
- For fault or seismic zones, consider a geotechnical or structural professional.
- You can independently verify zones using public sources such as FEMA, CAL FIRE/OSFM, and the California Department of Conservation maps.
Important Disclaimer
Brian Cooper is a licensed REALTOR® with eXp Realty, not an attorney or CPA. This page is general information about California real estate practice and is not legal or tax advice. Disclosure laws and the standard C.A.R. forms change, and every transaction is different. Confirm the specifics for your situation with the appropriate licensed professional (real estate attorney, CPA, or your county) and the current California law and C.A.R. forms before you act.
Frequently Asked Questions
Is an NHD report legally required in California?
For most residential one-to-four-unit sales, yes. Civil Code Section 1103 requires the seller to disclose whether the property is within the six statutory natural hazard zones on the standardized Natural Hazard Disclosure Statement.
Does the NHD mean my home will flood or burn?
No. The NHD only reports whether the property falls inside a government-mapped hazard zone as of the map data used. It is not a prediction, an inspection, or an insurance determination.
Who pays for the NHD report?
It is negotiable and addressed in the purchase agreement. The seller is responsible for providing the disclosure, but the cost of the third-party report is commonly assigned to one party or split, depending on local custom and your contract.
What is the difference between an Earthquake Fault Zone and a Seismic Hazard Zone?
An Earthquake Fault Zone (Alquist-Priolo) is mapped along an active fault's surface-rupture trace. A Seismic Hazard Zone is mapped for ground shaking, liquefaction, or earthquake-induced landslide. They are separate maps and a property can be in one, both, or neither.
If a hazard zone is disclosed, can I still cancel the purchase?
Often yes, if your contract gives you a disclosure or inspection contingency. Review the timeline with your agent. After contingencies are removed, your right to cancel may be limited.
Can I verify the hazard zones myself?
Yes. FEMA flood maps, CAL FIRE / Office of the State Fire Marshal fire severity zone maps, and California Department of Conservation seismic and fault maps are public. Your NHD report should also cite its sources.
