Butte County property tax starts at 1% of your property’s assessed value, the ceiling set by California’s Proposition 13. Voter-approved bonds and special district charges sit on top of that base, so most owners pay somewhere above 1% depending on which school, fire, and utility districts cover their parcel. Bills come out in October, split into two installments: the first is delinquent after December 10, the second after April 10. The Butte County Assessor sets the taxable value; the Treasurer-Tax Collector handles billing, collection, and payment plans.
What Makes Up the Rate
California Constitution Article XIII A caps the general ad valorem tax at 1% of assessed value, not current market value.1Justia. California Constitution Article XIII A – Tax Limitation The county collects that 1% and splits it among schools, fire, law enforcement, roads, and other local services.2Butte County, CA. Property Taxes
Added to that base are voter-approved bond debts: school district bonds, community college bonds, water district levies, and similar line items. Each one was authorized at an election, and because the mix of districts covering any given parcel differs, the total rate differs block to block.
Butte County publishes a multi-rate tax report each fiscal year showing the combined rate for every tax rate area in the county.3Butte County, CA. Multi-Rate Taxes If you’re buying, pull that report and look up the specific area for the parcel. The gap between a low-bond area and one carrying several overlapping obligations can run into hundreds of dollars a year.
Mello-Roos in Newer Developments
Some Butte County parcels, especially in newer subdivisions, also carry Mello-Roos special taxes. These fund infrastructure like roads, sewers, parks, and schools inside designated community facilities districts. They are not based on assessed value. They’re calculated using factors like lot size, square footage, or number of bedrooms, and a district requires two-thirds voter approval to form.4Southern California Association of Governments. Mello-Roos Community Facilities District A Mello-Roos charge can add noticeably to a bill and often doesn’t appear in a listing agent’s quick tax estimate.
How Your Assessed Value Is Set
Your bill equals the rate times the assessed value the Assessor enrolls for your property. Under Proposition 13, that value starts at your purchase price (the base year value) and can rise by no more than 2% per year as long as you own the property.5California State Board of Equalization. Understanding Property Tax Laws The annual adjustment tracks the California Consumer Price Index, but 2% is the hard cap no matter how fast inflation runs.1Justia. California Constitution Article XIII A – Tax Limitation
Long-term owners often pay on a value well below current market. When the property changes hands, the assessed value resets to the new purchase price, setting a fresh base year value.5California State Board of Equalization. Understanding Property Tax Laws New construction (an addition, remodel, or new structure) also triggers reassessment, but only on the value of the improvement; the existing structure keeps its protected base.
If the Market Drops
If current market value falls below your factored base year value on the January 1 lien date, the Assessor is required to reduce your assessment to the lower figure. This Proposition 8 reduction happens automatically, though you can request a review if you think it was missed. The catch: once values recover, your assessment can rise by more than 2% a year until it reaches the factored base year value again. It cannot go above that ceiling without a change in ownership or new construction.6California Board of Equalization. Decline in Value – Proposition 8
Supplemental Bills After You Buy
New buyers routinely get surprised by a supplemental bill. It’s separate from the regular annual bill and arrives after a change in ownership or completed new construction.7California Board of Equalization. Supplemental Assessment The county reassesses to current market value and then bills you for the difference between the old assessed value and the new one, prorated for the months left in the fiscal year.
Timing matters. Buy in October and you’ll owe supplemental taxes for roughly nine months (through June 30). Buy between January and May and you may receive two supplemental bills: one for the current fiscal year and one for the next full year. Each has its own due dates printed on the bill, separate from the regular November and February deadlines. Penalties for late payment on a supplemental bill cannot be waived because of confusion between you and your mortgage lender; that excuse is specifically excluded by state law.7California Board of Equalization. Supplemental Assessment
Deadlines, Penalties, and Default
Butte County’s fiscal year runs July 1 through June 30. Bills are mailed in October and split into two installments:8Butte County, CA. Property Tax Due Dates
- First installment: due November 1, delinquent after 5 p.m. on December 10. A 10% penalty is added immediately.
- Second installment: due February 1, delinquent after 5 p.m. on April 10. A 10% penalty plus a $44 administrative cost is added.
If a deadline falls on a weekend or holiday, the cutoff moves to the next business day.
If taxes remain unpaid at 12:01 a.m. on July 1, the property becomes tax-defaulted.9California State Controller’s Office. Public Auctions and Bidder Information Redemption penalties then accrue at 1.5% per month on the unpaid balance, which works out to 18% a year.10California Legislative Information. California Revenue and Taxation Code RTC 4103 The balance compounds because each additional year of unpaid taxes gets added to the running total at the same monthly rate.
You have five years to redeem by paying all defaulted taxes plus penalties. After five years, the tax collector gains authority to sell the property at public auction and must attempt the sale within four years of gaining that authority.9California State Controller’s Office. Public Auctions and Bidder Information Properties with nuisance abatement liens face a shorter three-year redemption window.
Ways to Pay
The Treasurer-Tax Collector accepts payment several ways, and the fees differ sharply:
- E-check online: free.11Butte County, CA. Convenience Fee
- Credit card online: 2.30% of the payment.11Butte County, CA. Convenience Fee
- Debit card online: $3.49 flat fee.11Butte County, CA. Convenience Fee
- Mail: send a check in the return envelope that came with your bill. The postmark date is what counts for the deadline.
- In person: Treasurer-Tax Collector, 25 County Center Drive, Suite 125, Oroville, CA 95965.
On a $5,000 payment, the credit card option costs $115 in fees while e-check costs nothing.
Exemptions and Relief That Can Lower Your Bill
A handful of programs reduce assessed value or defer payment. All require an application filed with the Butte County Assessor (or, for deferral, the Tax Collector).
Homeowners’ Exemption
If the property is your primary residence on January 1, you can claim a $7,000 reduction in assessed value.12California Department of Tax and Fee Administration. Homeowners’ Exemption At a 1% base rate that saves about $70 a year. The application is one-time; the exemption continues as long as you live there.
Disabled Veterans’ Exemption
Veterans with a service-connected disability rated at 100% (or compensated at the 100% rate for unemployability) qualify for a much larger reduction. The basic exemption was originally set at $100,000 of assessed value and is adjusted annually for inflation, now exceeding $180,000. A low-income version, originally $150,000, provides a larger reduction if the veteran’s household income falls below a separate annually adjusted threshold.13California Department of Tax and Fee Administration. Disabled Veterans’ Exemption Call the Assessor for the current-year figures, as both numbers rise each January.
Disaster Relief After Fire or Other Damage
Butte County’s wildfire history makes this one worth knowing. If your property suffers at least $10,000 in damage from a fire, flood, earthquake, or similar disaster, you can apply for a reassessment that temporarily lowers your assessed value to reflect the damaged condition.14California Department of Tax and Fee Administration. Information Guide for Disaster Relief for Damaged or Destroyed Property File with the Assessor within 12 months of the loss or by the county’s local ordinance deadline, whichever gives you longer.
When the Governor has declared a state of emergency, you may also defer the next installment. For homes, the eligibility threshold is $10,000 in damage or 10% of fair market value, whichever is lower. The deferral application has to reach the Tax Collector before the next installment deadline, December 10 or April 10.14California Department of Tax and Fee Administration. Information Guide for Disaster Relief for Damaged or Destroyed Property
Proposition 19 Base-Value Transfers
Since April 1, 2021, Proposition 19 lets homeowners age 55 or older, and severely disabled homeowners of any age, transfer their property’s taxable value to a replacement home anywhere in California, up to three times. If the replacement costs the same or less than the original, you keep the old taxable value entirely. If it costs more, the difference in market values is added to your transferred taxable value.15California Board of Equalization. Proposition 19 Fact Sheet Both homes must qualify for the homeowners’ or disabled veterans’ exemption, and you have to buy or build the replacement within two years of selling the original.
Proposition 19 also tightened the rules for inheriting a parent’s low tax base: the exclusion now applies only to a family home or farm, the child must use it as a principal residence, and a value cap applies above which the base value gets stepped up.16California Board of Equalization. Proposition 19 If you’re inheriting Butte County property and planning to keep it, read the full rules before closing on the transfer.
Appealing an Assessment You Think Is Too High
If the Assessor’s value looks wrong, you can file with the Butte County Assessment Appeals Board. The regular filing window runs July 2 through November 30 each year.17Butte County, CA. Assessment Appeals For a supplemental assessment, you have 60 days from the date on the supplemental notice.
Appeals go to the Clerk of the Board of Supervisors at 25 County Center Drive, Suite 200, Oroville.17Butte County, CA. Assessment Appeals A three-member board or a hearing officer weighs evidence from both sides and sets the value. The strongest cases bring recent comparable sales showing similar properties selling for less than your enrolled value on the January 1 lien date. An independent appraisal carries weight, and so do photos of condition problems the Assessor couldn’t see from the street. The question the board answers is narrow: was the enrolled value higher than what the property was actually worth on January 1?