Disclosure Risk April 28, 2026 5 min read

What Does a California Natural Hazard Disclosure Report Include?

Short answer: A California Natural Hazard Disclosure (NHD) report tells you whether a property falls within six state-defined hazard zones: flood, fire, earthquake fault, seismic hazard, dam failure, and state fire responsibility area. It is legally required in most California transactions. But it is a zone-mapping compliance document, not a full risk assessment. It does not cover insurance claim history, building permits, property condition, or most environmental contamination.
Key Takeaways
  • Required by California Civil Code Section 1103 in most residential transactions
  • Covers six statutory hazard zones: flood, fire, fault, seismic, dam, and state fire responsibility
  • Does NOT cover permits, insurance claims, violations, environmental contamination, or property condition
  • Many buyers mistake the NHD for a comprehensive risk check. It is the legal minimum, not the full picture.
  • NHD reports cost $54–$110 and are almost always provided by the seller

What the NHD report is legally required to disclose

California Civil Code Sections 1102–1103 require sellers to deliver an NHD report before the sale of most residential properties of one to four units. The report discloses whether the property is located within any of the following state-defined zones:

  • FEMA Special Flood Hazard Area (SFHA): The property is in a high-risk flood zone as mapped by the Federal Emergency Management Agency. Properties here typically require flood insurance.
  • CAL FIRE Fire Hazard Severity Zone (FHSZ): The property is in a state-mapped zone classified as Moderate, High, or Very High fire hazard by the California Department of Forestry and Fire Protection.
  • Alquist-Priolo Earthquake Fault Zone: The property is within 50 feet of an active fault trace as mapped by the California Geological Survey. Most lenders require a geological report before approving a loan in these zones.
  • Seismic Hazard Zone (liquefaction or landslide): The property is in a zone where an earthquake could trigger soil liquefaction (ground instability) or earthquake-induced landslide.
  • State Fire Responsibility Area (SRA): The property is in an area where the state, rather than a local government, is primarily responsible for fire protection. SRA properties carry different insurance and vegetation-management requirements.
  • Dam failure inundation zone: The property is in a zone that could be flooded if a nearby dam failed.

Many providers also include additional disclosures beyond the six statutory zones, such as airport influence areas, Mello-Roos and special tax districts, high-voltage power lines, and pipeline proximity. These extras vary by provider and are not uniformly required.

What the NHD report does NOT cover

This is where most buyers get tripped up. The NHD is a zone check that answers whether the parcel falls inside a mapped boundary. It does not answer what has actually happened at the property.

What NHD misses A property can receive a clean NHD report, no flags on any of the six zones, and still have a history of water damage insurance claims, open permits on unpermitted additions, active code violations, proximity to Superfund contamination, or a roof that failed inspection three years ago.

The NHD does not cover:

  • Insurance claim history (CLUE): Prior water damage, fire, structural, or other claims against the property. A property can be outside a FEMA flood zone and still have flooded twice.
  • Building permits and violations: Open permits, unpermitted additions, failed inspections, and code enforcement orders are not part of the NHD.
  • Contractor work history: Who did the work, whether they were licensed, whether the work was ever inspected.
  • Environmental contamination: Proximity to Superfund sites, GeoTracker contamination plumes, underground storage tanks, or agricultural pesticide application records. This data exists in EPA and state databases but is not in the NHD.
  • Property physical condition: The NHD maps zones, not the specific condition of the roof, foundation, electrical, or plumbing.
  • HOA disputes and litigation: Active HOA lawsuits, special assessments, or reserve fund shortfalls.
  • Ownership and lien history: Prior foreclosures, tax delinquencies, and mechanic's liens are not covered.
  • Radon: California does not have a statewide radon zone map. The NHD does not address radon risk.

The NHD is required, but it's the floor, not the ceiling. Know what it misses before you close.

Run a Full Property Check

How the NHD report is delivered

In California, the NHD report is almost always ordered and paid for by the seller or listing agent. It becomes part of the seller's disclosure package, which must be delivered to the buyer within the timeframe specified in the purchase contract, typically before the end of the inspection contingency period.

NHD reports are delivered as PDF documents, usually within one to four hours of order. Most providers charge between $54 and $110. Providers include PropertyID, NHD.report, California Property Data, and others.

Why buyers should not stop at the NHD

The NHD fulfills a legal obligation. It is a meaningful first step: knowing whether a property is in a high-risk fire or earthquake zone matters, especially for insurance costs and future insurability. But the NHD was designed to answer a narrow set of statutory questions, not to give buyers a full picture of what has happened to the property.

A property can pass every zone check on the NHD and still have significant undisclosed history: an insurance claim for water intrusion, a HVAC permit that was never closed, a contractor who lost their license midway through a remodel. These facts exist in public and private records. They are simply not covered by the NHD.

What to do Review the NHD report when the seller provides it and flag any hazard zone designations. Then run a separate permit history check, request the seller's insurance claim disclosure, and review any known code violations before your contingency deadline. Do not assume a clean NHD report means a clean property history.

Why It Matters Before Closing

The stakes are specific. A property in a Very High Fire Hazard Severity Zone may face homeowner's insurance availability challenges; multiple major insurers have stopped writing new policies in California VHFHSZ areas. If insurance is unavailable or cost-prohibitive, your lender may not fund the loan.

A property in an Alquist-Priolo fault zone will require a geological investigation report before most lenders approve the purchase. This adds time and cost to the closing process that buyers in competitive markets may not have anticipated.

Knowing the NHD status before you make an offer, rather than discovering it mid-contingency, gives you time to get insurance quotes, understand financing implications, and decide whether the zone designations affect your willingness to proceed at the offered price.

Sources HomeHistory Checks Beyond the NHD

  • OpenFEMA NFIP Claims Has this property filed flood insurance claims? Actual claim history, not just zone classification.
  • CAL FIRE FHSZ Fire Hazard Severity Zone status (High or Very High); same data as the NHD, but with historical context
  • EPA EJSCREEN Environmental justice scores, air toxics, hazardous waste proximity, lead paint risk by census tract
  • EPA Superfund / CERCLIS Toxic cleanup sites within proximity of the property
  • GeoTracker (CA SWRCB) Groundwater contamination plumes, underground storage tank sites
  • Cal MyHazards Wildfire, flood, earthquake, tsunami, liquefaction risk by address
  • Alquist-Priolo Fault Zones (CGS) Active fault proximity mapped by the California Geological Survey
  • FEMA National Flood Hazard Layer FIRM panel data for detailed flood zone classification
  • NOAA Sea Level Rise Viewer Coastal flooding projections for properties near the coast

Related Articles

HomeHistory goes beyond the NHD: permits, claims, violations, contamination, and more, all source-cited.

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This article is for informational purposes only and does not constitute legal advice. California disclosure requirements change and vary by transaction type. Consult a licensed California real estate attorney, your local building department, and a licensed insurance professional for guidance specific to your transaction and property.