An NHD report in California — short for Natural Hazard Disclosure report — is a document the seller must give you before closing that states whether the home sits inside any of six natural hazard zones mapped by state and federal agencies. California Civil Code Section 1103 requires it for most residential sales, and it covers floods, dam inundation areas, wildfire zones, earthquake faults, and seismic hazard areas.1California Legislative Information. California Code CIV 1103 – Natural Hazard Disclosure A “Yes” on any box doesn’t mean the house is damaged. It means the parcel falls inside a mapped zone, which can change your insurance, your building obligations, and your long-term costs.
The Six Hazard Zones the Report Checks
Every NHD statement answers the same six questions with Yes, No, or “Do not know and information not available from local jurisdiction.”
- Special Flood Hazard Area. A FEMA-designated Zone A or Zone V, where the property has at least a one-percent annual chance of flooding. A Yes here plus a federally backed mortgage means mandatory flood insurance.2Federal Emergency Management Agency. Special Flood Hazard Area (SFHA)
- Area of Potential Flooding (Dam Inundation Zone). Land that could be flooded if a nearby dam failed, mapped under California Government Code Section 8589.5.
- High or Very High Fire Hazard Severity Zone. Classified by CAL FIRE. The form breaks this into three sub-boxes: High FHSZ in a state responsibility area, Very High FHSZ in a state responsibility area, and Very High FHSZ in a local responsibility area. Properties here face vegetation management and defensible-space requirements.3California Legislative Information. California Code CIV 1103.2 – Natural Hazard Disclosure Statement
- Wildland Area With Substantial Forest Fire Risks. A separate category covering state responsibility areas under Public Resources Code Section 4125. The form specifically notes that the state is not responsible for providing fire protection to structures in these wildlands unless CAL FIRE has a cooperative agreement with a local agency.
- Earthquake Fault Zone. Areas mapped under the Alquist-Priolo Earthquake Fault Zoning Act. Inside these zones, a structure for human occupancy generally cannot be built within fifty feet of an active fault trace.4California Geological Survey. Alquist-Priolo Earthquake Fault Zones
- Seismic Hazard Zone. Areas prone to liquefaction (saturated ground losing strength during shaking) or earthquake-triggered landslides. The form has separate boxes for each sub-type, so check which one applies.
The front page shows the checkboxes. The twenty or so pages behind it contain the actual maps — read those too, because a Yes on seismic hazard tells you nothing about whether the concern is liquefaction, landslides, or both.
What Else Usually Comes With the Report
Most NHD companies attach supplemental disclosures that go beyond what Civil Code Section 1103 requires. These extras aren’t mandated, and the exact mix varies by provider, so ask what’s included before you order or review. Common additions:
- Airport Influence Area — whether noise, flight paths, or safety restrictions touch the parcel.
- Military Ordnance Location — whether the land is on or near a Formerly Used Defense Site, rated on a severity scale from one (imminent hazard) to five (no action needed).
- Radon Gas Exposure — radon seeps up from soil through floor cracks and utility gaps, and parts of California run high. Long-term exposure is linked to lung cancer.
- Registered Sex Offenders — a Megan’s Law notice pointing to the state registry.
Many reports also bundle a Mello-Roos and 1915 Improvement Bond Act disclosure. These are special tax liens funding local infrastructure like schools, parks, and fire stations, and they run with the property. Under California Civil Code Section 1102.6b, the seller must make a good-faith effort to obtain and deliver notices of any such liens. They show up as a separate line on your annual property tax bill and can add hundreds or thousands of dollars a year. If a district is listed, ask for the current annual assessment and the bond’s maturity date — some pay off in a decade, others run thirty years or more. Cross-check against the preliminary title report, which also flags these liens.
Your Right to Cancel After Receiving It
If the NHD report reaches you after you’ve already made your offer, you can back out. California gives you three days from in-person delivery, or five days if the report was mailed or sent electronically.5California Legislative Information. California Code CIV 1103.3 – Delivery of Disclosure To use the right, deliver a written notice of termination to the seller or the seller’s agent within the window. You don’t need to give a reason, and you don’t forfeit your deposit for exercising the statutory right.
The clock resets if the seller later provides a material amendment to any disclosure the statute requires. A mid-escrow update with new hazard information gives you a fresh three or five days.
What a Yes Means for Your Insurance and Costs
The zones flagged on the report shape what coverage you need and what you’ll pay.
A Special Flood Hazard Area triggers mandatory flood insurance if your loan is backed by Fannie Mae, FHA, VA, or any other federally related program.6Fannie Mae. Flood Insurance Requirements for All Property Types That policy is separate from your homeowners coverage and can run from several hundred to several thousand dollars a year depending on elevation and zone.
Fire severity zones bring a different problem. Many private carriers have pulled out of fire-prone parts of California, and if you can’t find coverage on the open market, you may end up on the California FAIR Plan, the state’s insurer of last resort. Fire-zone parcels also carry ongoing defensible-space duties around the structure. Get insurance quotes while you’re still in escrow. Finding out you can’t afford coverage after closing is one of the more expensive surprises in California real estate.
What to Do With Each Type of Yes
Your next step depends on which box is checked.
For a flood zone, get a flood insurance quote right away and work it into your monthly budget. For a fire severity zone or wildland area, confirm you can actually get homeowners coverage at a price you’ll pay long-term, and read the defensible-space obligations. For an earthquake fault zone or seismic hazard zone, consider hiring a geologist or structural engineer to assess the property before you release your inspection contingency. These consultations cost money. They’re a fraction of what you’d spend finding the problem after closing.
Keep the signed Natural Hazard Disclosure Statement permanently. If an insurance claim or a disclosure dispute comes up later, that document is your starting point.
Can You Rely on What the Report Says
Mostly, yes — with a limit. California gives sellers and agents a safe harbor when they rely on a third-party NHD company: if the error came from public agency data or a qualified professional, and ordinary care was used, nobody is liable for the inaccuracy.7California Legislative Information. California Code CIV 1103.4 – Errors, Inaccuracies, or Omissions A licensed geologist, engineer, or land surveyor’s report on matters within their expertise also satisfies the seller’s duty for those items.
The protection drops away when someone skips the disclosure or acts negligently. A seller who willfully or negligently fails to deliver the required NHD report can be held liable for actual damages the buyer suffers as a result — uninsured flood losses the buyer didn’t know to plan for, or retrofit costs tied to zone requirements that should have been disclosed. That liability shift is what the report is really doing. It moves the risk of a hazard surprise off the buyer and onto a paper trail of what was disclosed and when.