Somewhere in every California escrow, a document arrives that most sellers have never heard of until they're signing it: the Natural Hazard Disclosure report, or NHD. It's required, it's inexpensive, and it answers a question every buyer in the Inland Empire eventually asks — what natural risks come with this address?
What the NHD Is
California law requires sellers of most residential property to disclose whether the home sits in legally mapped natural hazard zones. The disclosure is delivered on a statutory form, and in practice nearly every transaction handles it by ordering a report from a third-party NHD company that researches the official maps and produces the completed disclosure — typically at a modest cost that the seller usually pays.
The Six Statutory Zones
- Special flood hazard areas — federally mapped flood zones that can trigger lender flood-insurance requirements.
- Dam inundation areas — mapped zones that could flood if a dam failed.
- Very high fire hazard severity zones — locally mapped areas of elevated wildfire risk.
- Wildland fire areas (state responsibility areas) — where the state has primary fire-suppression responsibility and additional rules can apply.
- Earthquake fault zones — mapped zones along active faults.
- Seismic hazard zones — areas mapped for risks like liquefaction or earthquake-induced landslide.
NHD reports commonly bundle useful extras as well — including the tax report identifying Mello-Roos and other special assessments on the parcel, which we've covered in its own post.
Why IE Sellers Should Order It Early, Not Late
Plenty of Inland Empire homes touch at least one mapped zone — foothill neighborhoods along the San Gabriels can intersect fire severity zones, and parts of the region carry mapped seismic or flood designations. None of this is exotic: buyers' lenders and insurers see these maps too. What matters strategically is when the buyer learns it.
- Ordered at listing, the NHD becomes part of the information buyers absorb before writing an offer — priced in, no drama.
- Delivered mid-escrow as a surprise, the same report becomes a renegotiation excuse or, worse, feeds an insurance-shopping panic that threatens the closing.
- Zone status also previews the buyer's insurance experience. A home in a mapped fire zone should prompt you to gather your insurance history and any wildfire-mitigation documentation before listing — more on that in Thursday's post on insurance and your sale.
What Sellers Sometimes Get Wrong
- You can't skip it because \"the buyer knows the area.\" The disclosure obligation is yours, and the statutory form is the standard of care.
- Being in a zone isn't a defect — it's a fact about the map. Thousands of homes sell in mapped zones every year. Surprise, not zone status, is what kills deals.
- The NHD covers mapped natural hazards; it doesn't replace your Transfer Disclosure Statement or your duty to disclose known material facts about the property itself.
JP Dauber is a licensed California broker (DRE #01499918) with 21+ years of experience managing Inland Empire escrows — including ordering the right reports at the right time. SoldByJP provides full-service home selling at a 1% listing fee. Get your free home valuation →