What property tax relief can a California wildfire victim claim?

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. 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. A section 51(a)(2) reduction reflects any decline in value as of the lien date, damage included, 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, ordinarily requires an application, and produces a reduced taxable value for the damaged or destroyed portion that stays in place until the property is restored, repaired, or reconstructed (section 170(g)). The practical distinction matters because a property owner who assumes an assessor will automatically apply calamity relief when the 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). Timely 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.

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 and that sustained a loss of more than $10,000, 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 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. The statutory definition of substantially damaged or destroyed is more generous than the phrase is usually given credit for, and getting it wrong is the most common way a qualifying claim gets abandoned before it is filed. Under section 69(c)(1), property is substantially damaged or destroyed if either the land or the improvements sustain physical damage amounting to more than 50 percent of either the land's full cash value or the improvements' full cash value immediately prior to the disaster. The land and the improvements are tested separately, against their own pre-disaster values, and damage crossing the threshold on either component alone satisfies the test. A reading that measures the damage against the combined value of the whole parcel is materially narrower than the statute and will screen out claims the statute allows. Comparable means similar in size, utility, and function to the property it replaces, and any portion that is not comparable is treated as having changed ownership. The value test is separate: a replacement worth up to 120 percent of the damaged property's full cash value takes the adjusted base year value outright, and a replacement worth more takes the adjusted base year value plus the amount above 120 percent (section 69(b)). 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 replacement must be of equal or lesser value, defined on its own scale: no more than 105 percent of the original property's full cash value if acquired in the first year after the damage, 110 percent in the second year, and 115 percent in 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 to the Constitution a statewide transfer for a primary residence substantially damaged or destroyed by wildfire or natural disaster (Cal. Const. art. XIII A, section 2.1), and section 69.6 implements it. Section 69.6 tests damage the same way as section 69, with the land and the improvements tested separately against their own pre-disaster full cash values; the constitutional definition measures the damage against the improvement value, so a claim resting on land damage alone should be tested against that text before it is filed. 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. The replacement must be purchased or newly constructed within two years of the sale of the original property. 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 (Property Tax Rule 462.540). On the proclamation question, the constitutional text Proposition 19 added treats the two triggers differently: a wildfire, as defined in Government Code section 51177, qualifies without a proclamation, while any other natural disaster must be one declared by the Governor (Cal. Const. art. XIII A, section 2.1).

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 covered by a Governor's emergency proclamation for the disaster and that has 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 on the regular installment date or within 30 days of the assessor's notice, whichever is later, 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, the section 194 deferral, 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. Section 69.6 splits the difference. Under the constitutional text Proposition 19 added, a wildfire qualifies without a proclamation, while any other natural disaster must be one declared by the Governor (Cal. Const. art. XIII A, section 2.1). 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 24-month window is the only disaster-specific extension written into section 170. The Legislature has taken the same approach elsewhere in the code, extending the section 69 replacement period for the Northridge earthquake, the Cedar Fire, the COVID-19 emergency period, and the 2018 Camp Fire, rather than changing the general rule for every future event. Section 69 has not been extended for the 2024 and 2025 fires. 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.

The separate-component damage test matters more in these fires than in most, and it is where the base year value transfers are most often given up too early. Much of the burned footprint sits in neighborhoods where the land carries the larger share of the parcel's value, so that the lot is worth more than the house that stood on it. A fire that took the structure down to the slab while leaving the land physically intact can fail a test that measures the loss against the parcel as a whole, because the destroyed improvements may not amount to half the combined value of land and improvements together. Section 69(c)(1) does not ask that question. It tests the improvements against the improvements' own full cash value immediately prior to the disaster, and a structure destroyed outright is damage of 100 percent of that value, which satisfies the threshold on its own no matter what the land underneath is worth. The owners a whole-property reading would wrongly exclude are the owners inside these fire perimeters, which is reason enough to check the premise before concluding that a transfer under section 69, 69.3, or 69.6 is unavailable.

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 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. G&G State Tax Group provides property tax assessment analysis for disaster-damaged property, including misfortune and calamity claims and base year value transfer modeling, alongside its state and local tax practice.