What Does a Natural Hazard Disclosure Report Cover, and Why Do California Sellers Need One?

A Natural Hazard Disclosure (NHD) Report tells a buyer whether a California property sits in one of six state-mapped hazard zones — flood, fire, or earthquake related — and it's required by law for nearly every residential sale in the state. The report is prepared by an independent third-party company, not the seller, and typically costs between $70 and $150.

What Are the Six Hazard Zones an NHD Report Covers?

California's Natural Hazard Disclosure Act requires sellers to disclose whether a property is located in: a Special Flood Hazard Area (as mapped by FEMA), a Dam Failure Inundation Area, a Very High Fire Hazard Severity Zone, a State Responsibility Area with substantial wildland fire risk, an Earthquake Fault Zone, or a Seismic Hazard Zone. The report confirms a yes-or-no status for each of the six zones based on official state and federal maps, not the seller's personal knowledge.

What Else Does the Report Include Beyond the Six Zones?

Most NHD reports bundle in additional disclosures that aren't part of the core six zones but are commonly delivered alongside them: proximity to an airport, nearby industrial uses, radon gas information, registered sex offender database notice (Megan's Law), and former military ordnance locations. Because of all this bundled content, a full NHD package often runs 40 to 60 pages, even though the legally required core is just the six-zone statement.

Who Orders the Report and What Does It Cost?

The seller is responsible for providing the NHD Report, and in practice it's almost always ordered through a specialized third-party NHD company, often coordinated by the listing agent once escrow opens. Pricing generally runs $70 to $150 for a standard residential report, with commercial or multi-unit properties sometimes priced higher. Because the report comes from an independent provider, that company — not the seller — carries liability if the report itself contains an error.

When Does the Buyer Need to Receive It?

California law requires the NHD Report to be delivered to the buyer as soon as practicable, generally alongside the rest of the seller's disclosure package early in escrow. If a buyer receives the NHD Report after their offer has already been accepted, they generally get a three-day right (five days if delivered by mail) to review it and decide whether to proceed, renegotiate, or cancel the transaction.

Are the Fire Hazard Maps Changing for Southern California Sellers?

Yes, and it's worth watching if you're planning to sell. CAL FIRE issued updated 2025 Fire Hazard Severity Zone maps for Local Responsibility Area lands in Los Angeles County, reflecting newer data on fuels, fire history, weather, and terrain. Local jurisdictions are required to adopt the updated maps by ordinance, and more parcels across the county are expected to shift into higher-hazard categories as a result. Because an NHD Report reflects whatever the official maps show at the time it's ordered, a property's hazard status can change even if nothing about the property itself has changed — so it's worth checking current zone status well before listing.

Frequently Asked Questions

Does the NHD Report replace other disclosures, like the Mello-Roos notice?
No. The NHD Report covers the six natural hazard zones and the commonly bundled items above, but Mello-Roos and other special tax assessments are disclosed separately, usually through the title company or county assessor.

Can a seller be exempt from providing an NHD Report?
Limited exemptions exist, such as certain transfers between family members, some trustee or probate transfers, and foreclosure-related transfers. Exemption rules are specific, so sellers should confirm eligibility with their agent or a real estate attorney rather than assume one applies.

Does being in a Special Flood Hazard Area mean I need flood insurance?
If a property is in a FEMA-designated Special Flood Hazard Area and has a federally backed mortgage, the lender will typically require flood insurance as a condition of the loan, regardless of what the NHD Report itself requires.

Is the NHD Report the same as a home inspection?
No. A home inspection evaluates the physical condition of the structure and its systems. The NHD Report is a disclosure of mapped hazard zones and related items — it says nothing about the condition of the roof, foundation, or appliances.

Updated for October 2026.