California property taxes: why your bill changes and how to question the value

If your home’s estimated value has fallen but your property-tax bill has risen, start by separating three things: the county’s assessed value, the market value on the assessment date, and the individual charges on the bill. A higher bill does not, by itself, prove the county has overvalued your home.

California’s familiar 2% rule generally limits annual inflation adjustments to a property’s Proposition 13 value. It is not a blanket limit on the total tax bill. Temporary assessment reductions, reassessment events, bond rates and direct charges can change the result.

California BOE: Proposition 13 and temporary value reductions (new tab) · Placer County: tax rates and voter-approved debt (new tab) · Placer County: direct charges and agency contacts (new tab)

How the county establishes your home’s value

A purchase generally establishes a new base-year value at fair market value, usually the purchase price in an open-market transaction. The assessor determines the value; an online estimate does not set the tax assessment. Certain transfers qualify for exclusions, so ask before assuming every title change causes reassessment.

California BOE: property reassessment after an ownership change (new tab)

The county tracks that base-year value with annual inflation adjustments. This is the factored base-year value. New construction can add assessed value for the new work; ordinary repair and maintenance generally are not treated the same way. Ask the assessor about the actual project and any applicable exclusion.

California BOE: new construction and reassessment (new tab)

For an annual decline-in-value review, January 1 is the key valuation date. For example, the regular 2026 to 2027 assessment concerns January 1, 2026, rather than what a home might sell for in October. A purchase or new construction can also produce a separate supplemental assessment with a different valuation date.

California BOE: how a decline-in-value review works (new tab) · Placer County: informal value review (new tab)

How much can the assessed value go up or down?

• Normal Proposition 13 indexing: the annual inflation adjustment is limited to the California Consumer Price Index change or 2%, whichever is lower. That limit does not govern a new base-year value after a reassessable ownership change or added new construction.
• Falling market value: Proposition 8 allows a temporary reduction when the January 1 market value is below the factored base-year value. There is no fixed 2% limit on that reduction.
• Recovery after a reduction: the temporary value is reviewed annually and can rise by more than 2%. Without a new reassessment event, it cannot exceed the factored base-year value.

California BOE: Proposition 13 and temporary value reductions (new tab) · Placer County: informal value review (new tab)

Illustration only: suppose the protected value is $600,000, but January 1 market value falls to $540,000. The lower amount may be enrolled. The following year, suppose market value reaches $580,000 while the protected ceiling reaches $612,000. The assessment may rise to $580,000, an increase greater than 2%, because the earlier reduction was temporary.

California BOE: Proposition 13 and temporary value reductions (new tab)

Why the bill can move differently from the assessment

The basic levy is 1% of net taxable value. Voter-approved debt adds other percentage-based taxes, and those rates can change each year. Direct charges, such as certain sewer, service-district or special-district charges, are separate amounts. An assessment reduction generally does not reduce a flat charge that is not based on value.

Placer County: tax rates and voter-approved debt (new tab) · Placer County: direct charges and agency contacts (new tab)

Compare these lines on both years’ bills: land plus improvements, exemptions, net taxable value, each bond tax, direct charges and any penalties. A qualifying owner-occupied home can receive a $7,000 homeowners’ exemption from taxable value. That is not a $7,000 tax refund. Contact the assessor if the exemption appears missing.

California BOE: homeowners' exemption (new tab)

An escrow payment is another number again. Your mortgage servicer may collect money for taxes and insurance, and an escrow shortage can affect the monthly payment. Compare the county bill with the servicer’s escrow analysis before attributing the entire payment increase to property taxes.

CFPB: why a mortgage payment changes (new tab) · OCC: escrow shortages and payment increases (new tab)

What to do if the county’s value looks too high

• Get the actual assessment notice and tax bill. Confirm the parcel number, tax year, valuation date, gross assessed value and exemptions. Do not compare a current online estimate with an unidentified year’s bill.
• Check the property facts. Flag incorrect living area, property type, condition or improvements. Ask the assessor to explain the record and how to submit evidence of an error.
• Gather genuinely comparable closed sales near the valuation date. Consider location, size, condition, lot and features. Asking prices and unadjusted neighborhood averages are not the same as a supported opinion of value.
• Ask for an informal assessor review and keep copies of your evidence and submission. Separately confirm the formal appeal deadline with the clerk of the assessment appeals board. Do not assume an informal discussion preserves your appeal rights.

California BOE: how a decline-in-value review works (new tab) · Placer County: assessment appeals and filing deadlines (new tab) · California BOE: assessment appeal questions and evidence (new tab)

For a January 1 decline-in-value review, BOE guidance generally points to sales near January 1 and no later than March 31. An appeals board cannot consider comparable sales more than 90 days after the valuation date. A summer or fall sale may be useful for a current market discussion without being eligible comparable-sale evidence for that year’s January 1 appeal.

California BOE: how a decline-in-value review works (new tab) · California BOE: assessment appeal questions and evidence (new tab)

Placer County: two different review deadlines

As checked October 12, 2026, Placer County accepts free informal annual value-review requests from July 2 through December 31. Its regular annual assessment-appeal window is July 2 through September 15, with a next-business-day rule when the closing date falls on a weekend or holiday. Other counties may use a November 30 appeal deadline. Verify the county and assessment type.

Placer County: informal value review (new tab) · Placer County: assessment appeals and filing deadlines (new tab) · California BOE: assessment appeal questions and evidence (new tab)

For Placer homeowners reading this in October 2026, the regular annual appeal deadline has passed, but the published informal-review window remains open. That does not reopen the formal appeal period. Supplemental and escape assessments have separate deadlines, generally 60 days from the applicable notice. Ask the clerk about your specific notice rather than assuming you must wait until next year.

Placer County: assessment appeals and filing deadlines (new tab)

Continue paying taxes on time while a review or appeal is pending. A successful review can lead to a corrected bill or refund, but the request itself does not suspend payment. A formal appeal can leave the value unchanged, lower it or raise it based on the evidence.

Placer County: informal value review (new tab) · California BOE: assessment appeal questions and evidence (new tab)

Who to contact with each question

• Assessed value, property facts or exemptions: your county assessor. In Placer County, call 530-889-4300 and start with the informal value-review page linked below.
• Formal appeal procedures and deadlines: the clerk of the assessment appeals board. Placer County lists 530-889-4020.
• Bill copies, payments or payment status: the county tax collector. Placer County lists 530-889-4120 and provides an online bill lookup.
• A bond rate or direct charge: use the agency contact printed beside that line on your bill. The assessor does not set every charge.
• An escrow shortage or mortgage-payment change: your mortgage servicer. For an individualized tax or legal question, consult a qualified tax professional or attorney.

Placer County: informal value review (new tab) · Placer County: assessment appeals and filing deadlines (new tab) · Placer County: view your property-tax bill (new tab) · Placer County: tax rates and voter-approved debt (new tab) · Placer County: direct charges and agency contacts (new tab)

Outside Placer County, use the California BOE county directory to find your assessor and appeals-board contact. County procedures and deadlines differ.

California BOE: county assessor and appeals-board directory (new tab)

Start with the right numbers

You do not need to assume the county is wrong to ask it to explain the assessment. Begin with the bill, the correct valuation date and a clear question. I can help you organize the housing and mortgage questions and identify what to ask next. The assessor and appeals board decide the tax assessment; an estimate or a conversation with me is not an appraisal or a promise of tax savings.

General California homeowner education, with Placer County procedures checked October 12, 2026. Individual facts, assessment types and filing deadlines matter. This is not individualized tax or legal advice.