Product April 28, 2026 6 min read

HomeHistory vs NHD Report: What Is the Difference?

Short answer: A California Natural Hazard Disclosure (NHD) report exists to satisfy statutory hazard disclosure tied to mapped zones and seller obligations. HomeHistory is built around documentary and administrative records (permits, contractors, claims-style signals) that sit outside that statutory hazard box. They overlap only where facts happen to appear in both worlds; they are complementary checks, not interchangeable products.
Key Takeaways
  • NHD addresses mapped natural hazards and related disclosure rules under California law
  • HomeHistory focuses on permit history, licensing, and other documentary risk signals
  • HomeHistory does not replace an NHD report your deal requires or your professionals recommend
  • Running both gives you hazard-zone context plus a paper trail on how the house was altered and by whom
  • Always confirm requirements with your broker and a California real estate attorney

What an NHD report is for

In a typical California resale, sellers and their agents must disclose whether the property lies in certain natural hazard areas defined by statute. Specialized NHD companies prepare reports that map the parcel against flood, fire, seismic fault, and other prescribed layers and document the seller side of that disclosure workflow. The product is tightly coupled to those legal categories and the maps that support them.

An NHD report is not a general home history audit. It will not, by design, tell you whether a kitchen remodel was finaled, whether the roof permit closed, or whether the contractor who pulled the permit still holds a valid license. Those questions live in building departments, licensing boards, and related records, not in the hazard disclosure statute.

What HomeHistory is built to surface

HomeHistory aggregates documentary sources buyers often chase manually: building permit status across portals and data partners, contractor license checks, assessor improvement hints, and other records that speak to how work was done and whether it left loose ends. The goal is to flag permit, contractor, and claims-style risk patterns before you waive contingencies, not to redraw flood or fire maps.

Not legal advice; not an NHD substitute HomeHistory.org does not provide legal opinions and does not issue statutory Natural Hazard Disclosure reports. If your purchase contract or local practice calls for an NHD, obtain it from a qualified disclosure provider and follow counsel. This article compares product categories for education only.

Side-by-side: different questions

Ask an NHD-focused workflow: Is this lot in a mapped special flood hazard area? Is it in a state responsibility area or high fire severity zone? Does the seller's disclosure packet reflect the mapped hazards? Ask a HomeHistory-style workflow: Were additions permitted and finaled? Is there an open permit on the electrical panel? Does the CSLB show disciplinary history for the contractor on the last major job? The first set follows statute and maps; the second follows agency records and licenses.

Add a documentary permit and contractor pass to your hazard disclosure stack.

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Why buyers still want both

A clean NHD package does not prove the house was built or altered correctly. A strong permit history does not remove the need to know whether you are in a liquefaction or wildfire zone. Serious due diligence stacks the statutory hazard picture with the documentary trail so you are not surprised after closing by either map-based obligations or unclosed permits.

Practical checklist

  • NHD: Order from a reputable provider; review every mapped item and seller responses with your agent.
  • Permits: Search LADBS, eTrakit, or your city's portal; note issued versus finaled status on structural, roof, electrical, and HVAC jobs.
  • Contractors: Cross-check names on permits against CSLB license and complaint history.
  • Counsel: Ask your attorney how NHD, inspection, and documentary findings affect your contingencies and repair requests.

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HomeHistory checks permit history across 12+ source categories before you close.

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This article is for informational purposes only and does not constitute legal advice. Natural Hazard Disclosure requirements, map accuracy, and broker duties vary by transaction and change over time. Consult a licensed California real estate attorney and a qualified NHD provider for guidance specific to your deal.