SB 663: Winter Fires of 2025: real property tax: exemptions and reassessment.

Official summary

Legislative Counsel’s Digest (official, as of the latest version). Written by nonpartisan legislative staff; reproduced verbatim.

(1)The California Constitution generally limits ad valorem taxes on real property to 1% of the full cash value of that property. For purposes of this limitation, “full cash value” is defined as the assessor’s valuation of real property as shown on the 1975–76 tax bill under “full cash value” or, thereafter, the appraised value of that real property when purchased, newly constructed, or a change in ownership has occurred. Existing law defines “newly constructed” and “new construction” to mean any addition to real property since the last lien date and any alteration of land or of any improvement since the last lien date that constitutes a major rehabilitation thereof or that converts the property to a different use. Existing law, where real property has been damaged or destroyed by misfortune or calamity, excludes from the definition of “newly constructed” and “new construction” any timely reconstruction of the real property, or portion thereof, where the property after reconstruction is substantially equivalent to the property prior to damage or destruction. Existing law, pursuant to the authorization of the California Constitution, authorizes the transfer of the base year value of property that is substantially damaged or destroyed by a disaster, as declared by the Governor, to comparable replacement property within the same county that is acquired or newly constructed within 5 years after the disaster, as provided.

Existing law authorizes the owner of property substantially damaged or destroyed by a disaster, as declared by the Governor, to apply the base year value of that property to replacement property reconstructed on the same site of the damaged or destroyed property within 5 years after the disaster if the reconstructed property is comparable to the substantially damaged or destroyed property, determined as provided.

This bill would extend the 5-year time period described above by 3 years if the property was substantially damaged or destroyed by the 2025 Palisades Fire, Eaton Fire, Hurst Fire, Lidia Fire, Sunset Fire, or Woodley Fire, or the 2024 Mountain Fire or Franklin Fire, on or after November 1, 2024, but before February 1, 2025. The bill would make these provisions applicable to the determination of base year values for the 2025–26 fiscal year and fiscal years thereafter. By imposing additional duties on local tax officials, the bill would create a state-mandated local program.

(2)The California Constitution authorizes the Legislature to authorize local governments to provide for the assessment or reassessment of taxable property physically damaged or destroyed after the lien date to which the assessment or reassessment relates. Existing property tax law authorizes the board of supervisors of a county, by ordinance, to provide that every assessee of any taxable property, or any person liable for the taxes thereon, whose property was damaged or destroyed without their fault, may apply for reassessment of that property, as provided. Existing property tax law requires, for property to be eligible for reassessment under these provisions, that the damage or destruction be caused by one of 3 specified occurrences, including a major misfortune or calamity in an area or region subsequently proclaimed by the Governor to be in a state of disaster if the property was damaged or destroyed by the misfortune or calamity that caused the Governor to proclaim the region to be in a state of disaster. Existing property tax law generally requires that an application for reassessment be filed within the latter of the time specified in the county’s ordinance or within 12 months of the misfortune or calamity and be executed under penalty of perjury.

This bill would also authorize a local government to provide for the assessment or reassessment of taxable property damaged by a major misfortune or calamity in an area or regions subsequently proclaimed to be in a state of emergency, as specified. The bill would authorize the local government by ordinance to provide the assessor the discretion to determine the appropriate date of damage for the purposes of reassessment.

This bill would, in the case of property damaged or destroyed by the 2025 Palisades Fire, Eaton Fire, Hurst Fire, Lidia Fire, Sunset Fire, or Woodley Fire, or the 2024 Mountain Fire or Franklin Fire, extend the period to file for reassessment to the latter of the time specified in the county’s ordinance or within 24 months of the fires. By expanding the crime of perjury, this bill would impose a state-mandated local program.

Sponsors

Sponsors by party (alphabetical): Democratic 14

“Support” is shown only as formal sponsorship recorded by the legislature. Roll-call votes are available on the official bill page.

Recent official actions

1. October 10, 2025Chaptered by Secretary of State. Chapter 549, Statutes of 2025.
2. October 10, 2025Approved by the Governor.
3. September 22, 2025Enrolled and presented to the Governor at 2 p.m.
4. September 11, 2025Assembly amendments concurred in. (Ayes 40. Noes 0. Page 2918.) Ordered to engrossing and enrolling.
5. September 11, 2025From committee: That the Assembly amendments be concurred in. (Ayes 5. Noes 0. Page 2940.)
6. September 10, 2025From committee: Be re-referred to Com. on REV. & TAX. pursuant to Senate Rule 29.10(d). (Ayes 3. Noes 0. Page 2759.) Re-referred to Com. on REV. & TAX.
7. September 10, 2025Re-referred to Com. on RLS. pursuant to Senate Rule 29.10(d).
8. September 9, 2025In Senate. Concurrence in Assembly amendments pending.
9. September 9, 2025Read third time. Urgency clause adopted. Passed. (Ayes 80. Noes 0. Page 3077.) Ordered to the Senate.
10. September 4, 2025Ordered to third reading.
11. September 4, 2025Read third time and amended.
12. September 2, 2025Read second time. Ordered to third reading.