SB 663 authorizes county boards of supervisors to adopt ordinances that let property owners (or the assessor) seek reassessment when taxable property is damaged or destroyed by a misfortune or calamity. The bill sets out how assessors must appraise pre- and post-event full cash value, requires percentage reductions when losses exceed a $10,000 threshold, and prescribes how taxes are prorated and refunded while property remains in damaged condition.
The measure also clarifies procedural elements — application formality, a six‑month appeal window to the county board, auditor entry and finality of reassessed values (subject to court review), and timing rules for additional assessments when repairs are completed. Importantly, SB 663 gives a 24‑month filing window for reassessment applications tied to a list of specified 2024–25 fires, which expands relief for many affected owners but shifts near‑term revenue outcomes for counties and auditors.
At a Glance
What It Does
Permits county ordinances that allow reassessment of taxable property damaged or destroyed by a governor‑declared disaster or other calamity; requires the assessor to value the property immediately before and after the event, compute percentage reductions when loss exceeds $10,000, and adjust the roll and tax bills accordingly. It also prescribes prorated tax calculations for the fiscal year of the damage and rules for restoring taxable value after repairs.
Who It Affects
Property owners and persons legally liable for property taxes in counties that adopt an ordinance, holders of possessory interests in public land, county assessors and their appraisal staff, county auditors who must enter reassessed values and issue refunds, and county boards that approve assessor‑initiated reassessments where needed.
Why It Matters
The bill creates a standard, statutory pathway for property tax relief after disasters, preserves Proposition 13 mechanics while offering targeted reductions, and extends deadlines for specific 2024–25 fires — a combination that materially changes short‑term local tax receipts and creates an uncompensated administrative workload for county offices.
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What This Bill Actually Does
SB 663 gives county boards the choice to adopt an ordinance allowing reassessment when property is damaged or destroyed without the owner’s fault. A board can limit the ordinance to governor‑declared disasters, broader misfortunes, or both; it may also let the assessor pick the appropriate date of damage.
If the assessor finds within the prior 12 months that taxable property in the county suffered qualifying damage, the assessor may initiate reassessment under the ordinance or wait for an owner’s application.
An owner (or person liable for taxes) who wants relief must submit a written application within the deadline set by the county ordinance or within the statutory window — generally 12 months after the event, but 24 months for several named 2024–25 fires. The application must describe the condition and post‑damage value, state the dollar amount of loss, and be executed under penalty of perjury (or verified by affidavit if filed from outside California).
If the assessor files first, the officer must serve the owner with an application form and the owner then has 12 months to complete it.On receipt of a proper application, the assessor appraises full cash value of land, improvements and personalty immediately before and after the damage. If the total loss across those categories is $10,000 or more, the assessor separately computes percentage reductions for each category and reduces the roll by those percentages, subject to a cap at actual loss.
The assessor notifies the applicant in writing of the proposed reassessment; the applicant can appeal to the county board within six months, and the board must hear the appeal under rules that treat the change as an off‑cycle assessment. Once the reassessed values are forwarded to the county auditor and entered on the roll they are final administratively and can be overturned only in court.Tax mechanics: SB 663 instructs how to prorate taxes for the fiscal year in which damage occurred — a prorated portion of what would have been due before the event plus a prorated amount based on the damaged assessment for the remainder of the year.
Overpayments are refundable under existing refund procedures. The damaged assessed value, increased annually by the statutory inflation factor, becomes the taxable value until full restoration.
Partial repairs on subsequent lien dates increase taxable value proportionally; when repairs are finished the bill requires one or two additional assessments depending on the completion date to bring the roll up to the new taxable value.
The Five Things You Need to Know
The assessor must compute separate percentage reductions for land, improvements, and personalty when aggregate loss exceeds $10,000, and may not reduce values by more than the actual loss.
Applicants must file a written, signed application showing condition and post‑damage value; filings are under penalty of perjury or verified by affidavit if executed outside California.
The assessor must notify the applicant of the proposed reassessment and the applicant has six months from that mailing to appeal to the county board, which hears the case as an off‑cycle assessment appeal.
Reassessed values entered on the roll by the auditor are administratively final and can be reviewed only by a court of competent jurisdiction, limiting further administrative reexamination.
For the 2025 Palisades, Eaton, Hurst, Lidia, Sunset, and Woodley Fires and the listed 2024 fires (Mountain and Franklin), the application window is extended to 24 months from the calamity or the ordinance period, whichever is later.
Section-by-Section Breakdown
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County authority to adopt reassessment ordinances and eligibility triggers
This subsection gives boards of supervisors power to adopt ordinances authorizing reassessments for property damaged without owner fault. It defines eligible events (governor‑proclaimed disasters, misfortunes, and disruptions to possessory interests) and permits the ordinance to cover some or all of those categories. Practically, this is an opt‑in tool: counties decide the scope and effective period of relief, and the assessor may be granted discretion to set the date of damage and to initiate reassessments in some circumstances.
Appraisal method, $10,000 threshold, and percentage reductions
The assessor must appraise full cash value immediately before and after the event for land, improvements and personal property. If the combined decrease is $10,000 or more, the assessor computes separate percentage reductions for each category and applies those reductions to the roll; reductions cannot exceed actual loss. This creates a two‑step calculation: a monetary threshold to trigger percentage math, then category‑level percentage adjustments to preserve allocation between land and structures.
Notice, appeal timeline, and finality rules
After appraisal the assessor must send a written notice of the proposed reassessment; the owner then has six months to appeal to the county board of equalization or assessment appeals board. The board treats the matter as an assessment made outside the regular period and its decision on damaged value is final administratively. Reassessed values entered by the auditor cannot be reworked administratively and are subject to judicial review only, reducing the scope for later county adjustments.
Assessor‑initiated relief and board approval where authorization is limited
If no owner applies but the assessor identifies qualifying damage within the prior 12 months, the assessor must provide an application form to the last known owner; the owner then has 12 months to file. Where the assessor lacks general authority to initiate reassessments, subdivision (l) allows the assessor, with board approval, to reassess particular properties — a check that ensures board oversight when the assessor seeks to start off‑cycle changes without broad ordinance authority.
Tax proration, refunds, and procedural refunds
SB 663 prescribes how to prorate taxes for the fiscal year in which damage occurs: owners pay a prorated share of what would have been due before the event plus a prorated amount on the reassessed (damaged) value for the rest of the fiscal year. Any tax paid in excess of the recalculated total is refunded under existing refund procedures or by board order without a formal claim. This locks in both the calculus for the damaged year and a path for correcting overpayments.
Taxable value while damaged and restoration adjustments
The assessed value in the damaged condition becomes the taxable value until full restoration, and that value is compounded each year by the consumer price inflation factor used elsewhere in the code. Partial restorations increase taxable value proportionally to the percentage of repairs completed on a lien date; full restoration triggers one or two supplemental assessments depending on whether repairs finish before or after May 31. Those timing rules can produce different supplemental tax bills depending on when reconstruction completes during the year.
Extended filing window for specified fires
SB 663 specifically lists several 2024 and 2025 fires for which the application window is lengthened to 24 months after the calamity or the ordinance’s time period, whichever is later. That targeted extension expands eligibility for those affected by named wildfires and is the clearest substantive change in the bill versus standard reassessment timelines.
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Explore Finance in Codify Search →Who Benefits and Who Bears the Cost
Every bill creates winners and losers. Here's who stands to gain and who bears the cost.
Who Benefits
- Homeowners and commercial property owners in counties that adopt an ordinance — they can have their tax liability reduced to reflect damaged condition and receive prorated relief for the fiscal year of the event.
- Holders of possessory interests on state or federal land whose permits were suspended or restricted — the bill explicitly covers restricted access losses when the county ordinance applies.
- Owners affected by the listed 2024–25 fires — the 24‑month filing window gives them more time to document losses and apply for tax relief, a practical benefit for those faced with displacement and long insurance timelines.
- County assessors and clerks of the board — they gain a clear statutory process for administering disaster reassessments, reducing legal ambiguity about off‑cycle assessments and appeals procedures.
Who Bears the Cost
- County governments and local services reliant on property tax revenue — expanded reassessments reduce near‑term assessed values and alter cash flows for counties, cities, and special districts.
- County assessors' and auditors' offices — they must absorb the additional workload of appraisals, percentage calculations, notices, roll changes, and refunds without an explicit funding source.
- Taxpayers in the same jurisdictions — while relief is targeted, reduced assessed values can shift budget pressure onto other revenue sources or require spending adjustments that affect broader constituents.
- Insurance adjusters and reconstruction contractors — indirect administrative and timing costs arise because tax relief calculations hinge on documented losses and reconstruction completion dates, which tie into claims and repair schedules.
Key Issues
The Core Tension
The central dilemma is between offering timely, meaningful tax relief to property owners recovering from disasters and protecting the stability and predictability of local property tax revenue and administration — giving counties discretion and extended filing windows improves individual fairness but creates uneven treatment, administrative burdens, and near‑term fiscal pressure on local governments.
SB 663 balances targeted tax relief with strict procedural mechanics, but those mechanics create practical and policy frictions. Giving assessors discretion to set the date of damage and to initiate reassessments where they detect qualifying loss can produce inconsistent outcomes across counties and raises questions about uniformity in valuation practices; county‑by‑county ordinances increase variation in who actually gets relief.
The $10,000 aggregate threshold and category‑level percentage approach are administrable, but they also exclude many small losses and require assessors to make granular allocations between land, improvements and personalty — tasks that are time‑consuming and evidence‑dependent.
The bill’s finality rule — reassessed values entered on the roll are administratively unreviewable except by court — tightens predictability but shifts dispute resolution to the judiciary, which may increase litigation costs for property owners. The special 24‑month window for named fires is equitable for those events but creates a preferential treatment template; other disaster victims may press for similar extensions, multiplying fiscal exposure.
Finally, compounding the damaged taxable value by the statutory inflation factor preserves some real‑value erosion over time, limiting permanent revenue loss but also blunting the extent of long‑term relief for severely damaged properties.
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