The Natural Hazard Disclosure (NHD) report tells you whether a California home sits in a state-mapped hazard area — a flood zone, a fire hazard severity zone, an earthquake fault zone, or another designated hazard area. It is a mandatory seller disclosure, almost always prepared by a specialized third-party company that researches official government maps. As of 2026 it covers six statutory hazard categories and is a routine part of every California home sale.
What the NHD covers — the six statutory hazards
California law requires sellers to disclose whether a property lies within certain mapped hazard zones. The standard Natural Hazard Disclosure Statement addresses six statutory hazards:
1. Special Flood Hazard Area — a FEMA-designated flood zone. 2. Area of Potential Flooding — land that could flood if a dam failed. 3. Very High Fire Hazard Severity Zone — areas mapped by the state as having elevated wildfire risk. 4. State Fire Responsibility Area (Wildland Area) — land where the state, not a local agency, has primary fire protection responsibility.
5. Earthquake Fault Zone — areas along known active faults, mapped under the Alquist-Priolo Act. 6. Seismic Hazard Zone — areas prone to earthquake-induced landslides or liquefaction. The NHD report answers "Yes," "No," or "Unknown" for each.
How to read your NHD report
The first page of the NHD is the statement itself: a grid of Yes/No answers for each of the six hazards, signed by the seller and the preparer. Behind that summary, the report usually runs many pages of supporting maps and explanatory text. Most of the bulk is standardized language — the Yes/No grid is what changes from property to property.
Pay attention to which company prepared the report and the date. Hazard maps are updated periodically, especially fire maps, so a current report matters. Also note that many NHD reports include additional, non-statutory information as a courtesy — tax and assessment data, environmental notices, and more — but the six statutory hazards are the legally required core.
What a 'Yes' means for insurance and cost
A "Yes" on the NHD does not mean you cannot or should not buy the home. Plenty of excellent California homes sit in mapped hazard zones. What a "Yes" means is that you need to do some specific homework before you remove contingencies.
Flood zone "Yes": if you finance with a federally backed loan and the home is in a Special Flood Hazard Area, your lender will require flood insurance. Get a flood insurance quote for the specific address early — premiums vary widely and can meaningfully change your monthly payment.
Fire zone "Yes": a property in a Very High Fire Hazard Severity Zone or a State Responsibility Area can be harder and more expensive to insure as of 2026. Some carriers limit new policies in these areas, which is why buyers may need to combine the California FAIR Plan (for fire coverage) with a separate "difference in conditions" policy. Always get a real homeowners insurance quote for the actual address before your contingencies come off.
NHD in Simi Valley and Ventura County
Ventura County's geography means hazard zones are common — and that is normal here, not alarming. Portions of the county sit in mapped fire hazard severity zones, particularly where neighborhoods meet open hillsides and the wildland-urban interface. Areas near the Santa Clara River and other waterways can fall within flood hazard areas, and the region has mapped earthquake fault and seismic hazard zones as well.
In Simi Valley specifically, you will see properties along the surrounding hills flagged for fire hazard, and pockets of the valley floor flagged for flood or seismic hazards. None of this is a reason to avoid the area — it is a reason to read each property's NHD individually. Two homes a few streets apart can have very different hazard profiles, and therefore very different insurance costs.
What a hazard designation does and doesn't tell you
It is worth being precise here. The NHD tells you whether a property is inside a mapped zone. It does not measure the actual risk to that specific structure — a well-maintained home with defensible space and a modern roof in a fire zone may be far safer than the map alone suggests, while still showing a "Yes."
Conversely, a "No" on every line does not mean zero risk. California is earthquake country statewide; flooding can happen outside mapped flood zones. The NHD is a starting point for informed decisions — pair it with your inspections, an insurance quote, and common sense about the home's location and construction.
What I tell buyers when a hazard shows up
When an NHD comes back with a "Yes," the first thing I tell clients is: don't panic, and don't ignore it. We do three things. First, we get a real insurance quote for that exact address right away, so the monthly cost is a known number, not a guess. Second, we factor that number into whether the home still works for your budget.
Third, we make sure the right inspections happen — a home in a seismic zone, for example, may warrant a closer look at foundation and bracing. Only after we have the insurance number and the inspection results do we talk about removing contingencies. I have helped plenty of clients happily buy in mapped hazard zones — the difference between a good outcome and a bad one is doing this homework before the contingency deadline, not after.
Note: hazard maps, insurance programs, and the FAIR Plan change over time. Verify current details with a licensed insurance agent during your transaction.
Frequently Asked Questions
What is a Natural Hazard Disclosure in California?
The NHD is a mandatory seller disclosure report that states whether a property lies within state-mapped hazard zones — flood, fire, and earthquake areas. It is typically prepared by a specialized third-party company.
What hazards does the NHD report cover?
The NHD addresses six statutory hazards: special flood hazard areas, areas of potential dam-failure flooding, very high fire hazard severity zones, state fire responsibility (wildland) areas, earthquake fault zones, and seismic hazard zones.
Does a 'Yes' on the NHD mean I shouldn't buy the home?
No. A 'Yes' simply means the property is inside a mapped zone. Many great California homes are. It means you should get a real insurance quote and appropriate inspections before removing your contingencies.
Will I need flood or fire insurance if the NHD says 'Yes'?
If a financed home is in a FEMA Special Flood Hazard Area, your lender will require flood insurance. Homes in very high fire hazard zones can be harder and costlier to insure as of 2026 — always get a written quote for the specific address.
Are homes in Simi Valley in fire hazard zones?
Some are. Properties near Simi Valley's surrounding hills and the wildland-urban interface are commonly mapped in fire hazard severity zones, while parts of the valley floor may show flood or seismic designations. Each property's NHD should be reviewed individually.
