What property tax relief can a California wildfire victim claim?
Edvin Givargis Published 13 minute read
The short answer
A property owner whose California real property was damaged or destroyed by wildfire, and who lost at least $10,000 of value, may file a claim for reassessment under Revenue and Taxation Code section 170, commonly called a misfortune and calamity claim, which temporarily lowers the assessed value to reflect the damage and restores it, without a new base year value, once the property is rebuilt to substantially the same condition. That claim is distinct from the routine annual decline-in-value review under section 51(a)(2), which corrects for a market downturn rather than physical damage and reverses automatically once market value recovers. An owner who does not rebuild on the same site has separate options: transferring the old base year value to a comparable replacement property in the same county under section 69, to a replacement in another county that has opted in under section 69.3, or, for a primary residence, anywhere in California under section 69.6, the disaster-victim provision Proposition 19 added in 2020. Each transfer path has its own comparability test, filing deadline, and mechanics for what happens when the replacement costs more than the original. A separate deferral and penalty-cancellation mechanism under sections 194, 194.1, and 194.9 covers the tax bill while a reassessment claim is pending. For property damaged by the January 2025 Los Angeles area fires and several 2024 and 2025 fires named in the statute, the filing deadline for the section 170 claim was extended from 12 to 24 months.
The first claim: misfortune and calamity reassessment under section 170
Section 170 of the Revenue and Taxation Code lets an assessee whose property was damaged or destroyed through no fault of the assessee's own apply for an immediate reassessment. The threshold is a decline of at least $10,000 in the sum of the full cash values of the affected property, measured before and after the event; the statute reaches real property, business personal property, boats and aircraft, and certain manufactured homes. The application must be filed within the time specified in the county's own ordinance, or within 12 months of the damage, whichever is later, so the operative deadline can run longer than a year depending on the county, and it must be confirmed against that county's ordinance rather than assumed from the statute alone. Where the Governor has proclaimed a state of disaster for the area, the statute also reaches a diminution in value caused by restricted access to the property, built for the situation where a fire perimeter or an evacuation order kept an otherwise intact property unusable for a period. An assessor may also initiate reassessment on its own if it determines that taxable property in the county was damaged or destroyed within the preceding 12 months, so a claim is not always the only route in, though a property owner should not assume the assessor will find every parcel without a filed application. Once reassessed, a corrected bill or refund follows, and the property owner may appeal a proposed reassessment to the assessment appeals board within six months of the date the notice was mailed.
Not the same relief: the Proposition 8 decline-in-value review
Section 51(a)(2), the provision commonly associated with Proposition 8, requires the assessor to value property each year at the lesser of its factored base year value or its current full cash value, considering damage, depreciation, obsolescence, and other factors that reduce value. It sounds similar to a misfortune and calamity claim, and it is sometimes confused with one, but it addresses a different problem. A section 51(a)(2) reduction reflects a market-driven decline, and it is inherently temporary: the property is reappraised annually until its market value again exceeds the factored base year value, at which point the assessment reverts, with no permanent change to the base year value itself. A section 170 reduction, by contrast, follows physical damage from a specific event, requires an application, and produces a base year value adjustment for the damaged or destroyed portion, one that becomes permanent unless and until the property is restored. The practical distinction matters because a property owner who assumes an assessor will automatically apply calamity relief when the actual mechanism at work is the ordinary annual decline-in-value review may miss the section 170 filing deadline, or may misunderstand why the assessment moved without having filed anything.
Rebuilding on the same site: restoration of the base year value
An owner who repairs or reconstructs the damaged property on the same site, rather than moving, has a separate protection under section 70(c). Reconstruction of property damaged or destroyed by misfortune or calamity is excluded from the definition of new construction, and so does not trigger a new base year value, where the property after reconstruction is substantially equivalent to the property before the damage. In effect, an owner who rebuilds the same house is not penalized with a higher assessment for doing so, so long as what gets built back is comparable to what was lost rather than a substantial upgrade. Reconstruction that goes beyond substantially equivalent, a materially larger or more valuable structure than what existed before, is treated as new construction to the extent it exceeds that standard, and that excess receives its own new base year value under section 110.1. What counts as substantially equivalent is a fact question in each case, and a property owner planning a rebuild that will be noticeably larger or more upgraded than the original structure should treat that comparison as a live issue with the assessor's office before construction is complete, not after.
Two companion provisions, both reshaped by the Legislature in 2025, sit alongside section 70(c) for the same-site rebuild. Section 70.5 lets the owner of property substantially damaged or destroyed in a Governor-declared disaster apply the old base year value to property reconstructed on the same site within five years, with its own value bands: a rebuild whose full cash value stays within 120 percent of the destroyed property's value keeps the old base year value outright, a rebuild above 120 percent adds only the excess to the old base year value, and a rebuild worth less than the old base year value takes the lower figure. An owner who takes section 70.5 relief is not eligible for the section 69 transfer, so the same-site and move-away routes are an election between remedies, not a stack. For property substantially damaged or destroyed between November 1, 2024 and February 1, 2025 by the eight named fires (the six January 2025 fires plus the 2024 Mountain and Franklin fires), the Legislature extended section 70.5's five-year reconstruction window by three years, to eight (section 70.5(f), added by Stats. 2025, ch. 549). And for property impacted by the six named 2025 fires that does not qualify under section 170, new section 171.5 fixes the January 1, 2025 lien date value at the property's damaged value, so the 2025-26 roll reflects the loss even where no county ordinance claim was available (Stats. 2025, ch. 530).
Moving instead of rebuilding: the base year value transfer options
A property owner who does not rebuild on the same parcel has three distinct paths to carry the old, lower base year value to a replacement property, and they differ in geographic reach, comparability standard, and filing deadline.
Within the same county (section 69). Where the property was substantially damaged or destroyed, meaning physical damage exceeding 50 percent of the property's full cash value immediately before the disaster, in an area the Governor has proclaimed to be in a state of disaster, the owner may transfer the base year value to comparable replacement property acquired or newly constructed within the same county within five years of the disaster. Comparable means similar in size, utility, and function to the property it replaces, and the replacement's full cash value generally cannot exceed 120 percent of the damaged property's value without affecting the comparability determination. Only the owner of the damaged property qualifies, and that owner must take title to the replacement.
Across county lines (section 69.3). A county may, but is not required to, adopt an ordinance authorizing an intercounty transfer for a primary residence substantially damaged or destroyed in a Governor-proclaimed disaster, accepting a base year value transferred in from a different county. Participation is optional and changes as counties adopt or repeal ordinances, so the current list should be confirmed directly with the receiving county's assessor rather than assumed from this article. Where a county participates, the comparability test runs on the same escalating scale used elsewhere in these transfer statutes: generally no more than 105 percent of the original property's value within the first year after the disaster, 110 percent within the second year, and 115 percent within the third.
Anywhere in California, for a primary residence (section 69.6, Proposition 19). Proposition 19, approved by voters in November 2020 and operative for this purpose on and after April 1, 2021, added a statewide transfer for a primary residence substantially damaged or destroyed by wildfire or natural disaster, defined the same way as under section 69, physical damage exceeding 50 percent of value. The replacement may be purchased or newly constructed anywhere in the state, without regard to county participation, and disaster victims are not subject to the three-transfer limit that applies to the separate over-55 and severely disabled claimants who share section 69.6's mechanics. The value comparison follows the same equal-or-lesser-value bands used throughout the Proposition 19 transfer scheme: 100 percent of the original home's full cash value before the original is sold, 105 percent within the first year after the sale, 110 percent within the second year. A replacement that costs more than that threshold does not disqualify the claim; instead, the excess above the threshold is added to the transferred, factored base year value, so the new taxable value becomes the old base year value plus that excess rather than a fresh market-value assessment of the whole replacement. Section 69.6's own definition of a qualifying disaster does not, on its text, carry the governor-proclamation requirement that sections 69 and 69.3 carry; the operative test is the 50 percent damage threshold, a meaningful difference worth checking against the current Proposition 19 implementing regulations before it is relied on in a specific case.
The bill while the claim is pending: deferral and penalty relief
A property owner does not have to choose between filing a section 170 claim and paying an installment on an assessment that no longer reflects the property's condition. Sections 194 and 194.1 allow an owner of eligible property with substantial disaster damage, defined as damage of at least 10 percent of fair market value or $10,000, whichever is less, for a homeowner's-exemption property, and at least 20 percent for other property, located in a county that has proclaimed the disaster and adopted a section 170 ordinance, to defer the next installment of tax on the regular roll under section 194.1, with a parallel provision, section 194.9, covering the supplemental roll, without penalty or interest, so long as the deferral claim is filed by the installment's due date, typically alongside the reassessment claim itself. Once the assessor completes the reassessment and issues a corrected bill, the deferred amount becomes due on the normal installment date, or 30 days after the corrected bill is mailed, whichever is later. If the assessor determines the property does not in fact qualify for reassessment, the deferred tax becomes due within 30 days of that determination, and an owner who claimed the deferral in bad faith is subject to the ordinary delinquency penalty on the unpaid amount.
Governor-declared disaster versus a local emergency
Several of these remedies turn on whether the Governor, not merely a city, county, or fire department, has proclaimed a state of emergency or disaster for the affected area. Section 170's restricted-access provision, and the base year value transfers under sections 69 and 69.3, are written around a Governor-proclaimed disaster. A local emergency declaration by a city or county, useful for many other purposes, does not by itself satisfy that statutory trigger. Section 170's basic reassessment claim, by contrast, does not require a gubernatorial proclamation at all; it runs on the damage threshold and the county's own ordinance regardless of who declared what. And section 69.6, as discussed above, is written around the 50 percent damage threshold rather than a proclamation requirement. The practical consequence is that a property owner cannot assume every disaster-relief provision in the code turns on the same trigger, and a claim built on the wrong premise, assuming a Governor's proclamation covers a remedy that does not require one, or assuming a local emergency declaration satisfies a remedy that requires the Governor's proclamation, can cost time in a process where several of the deadlines are already unforgiving.
The January 2025 Los Angeles fires
For property damaged or destroyed by the Palisades Fire, Eaton Fire, Hurst Fire, Lidia Fire, Sunset Fire, or Woodley Fire, all occurring in January 2025, or by the 2024 Mountain Fire or Franklin Fire, section 170 was amended to extend the filing deadline for a misfortune and calamity reassessment claim from 12 months to 24 months from the date of the damage, running from whichever is later, the county's own ordinance period or the 24-month statutory window. Every fire named in that extension had a gubernatorial state of emergency proclaimed for it, which also opens the base year value transfer provisions discussed above for owners in the affected areas. The extension reflects a pattern in this part of the code: the Legislature has repeatedly lengthened section 170's ordinary filing window for specific, named disasters, including the Northridge earthquake, the Cedar Fire, the COVID-19 emergency period, and the 2018 Camp Fire, rather than changing the general 12-month rule for every future event. A property owner whose damage does not come from one of the named 2024 or 2025 fires remains on the general 12-month-or-ordinance rule, and should not assume the 24-month window applies without checking whether the specific fire is one the statute names.
Practice notes
The recurring error is treating these as one remedy instead of several, each with its own clock. A property owner focused on the section 170 reassessment can lose track of the shorter, separate deadlines that govern a base year value transfer, particularly the five-year window under section 69, which sounds generous until an owner who intended to rebuild changes course midway through and only then starts evaluating a replacement purchase. The comparability tests are also easy to get wrong in the direction of assuming a bigger, better replacement carries the old base year value automatically; it does not, and the value-difference addition mechanics under the Proposition 19 transfer can produce a materially higher taxable value than expected if the excess above the equal-or-lesser-value threshold was not modeled before the purchase closed. Where a property sits in an area affected by one of the 2024 or 2025 fires named in the current statute, confirming which extended deadline applies, and which county's ordinance governs the underlying section 170 claim, is worth doing before any filing goes in rather than after a deadline has passed. In practice, sorting out which of these provisions applies, and modeling the base year value consequences of a replacement purchase before it is made, is exactly the kind of property tax assessment analysis that benefits from involvement before the filing deadline, not after it.
This article states the law as of September 19, 2026
Statutes, rates, thresholds, and agency practice change, and a different set of facts can change the answer. Before acting on anything discussed above, contact G&G State Tax Group to confirm what has changed since this was written and how the rules apply to a specific situation.
G&G State Tax Group, LLC is a state and local tax advisory firm. The firm provides state and local tax consulting and representation in state and local tax controversies. G&G does not prepare or file tax returns, perform attest services, or provide bookkeeping, and is not a CPA firm.