California property tax is not a flat rate across the state
California's property tax rate varies by county and city because each local government sets its own tax rate on top of a statewide base. The statewide base rate is 1%, but most counties add additional taxes for schools, flood control, libraries, and other services. Your total property tax bill depends on where your property sits — a house in one county might pay a significantly different rate than an identical house in another county.
The county assessor determines your property's assessed value, and the tax collector multiplies that value by your local tax rate to calculate what you owe. Because California's Proposition 13 (passed in 1978) limits how much assessed values can increase each year, two neighboring properties of similar market value can have very different tax bills if one was purchased years ago and the other recently.
Key Takeaways
- California's base property tax rate is 1%, but your actual rate includes county and local add-ons that vary by location.
- Your property tax bill is calculated by multiplying your assessed value (set by the county assessor) by your local tax rate.
- Proposition 13 caps annual increases in assessed value at 2% per year, so older properties often have lower tax bills than newer ones in the same area.
- You can find your specific tax rate by contacting your county assessor's office or checking your property tax bill, which lists the rate breakdown.
How the 1% base rate works with local add-ons
The 1% statewide rate applies to your assessed property value, but this is only the beginning of your bill. On top of this, counties and cities add their own tax rates for specific purposes. A county might add 0.25% for schools, another 0.10% for a flood control district, and a city might add 0.15% for local services. These additions stack, so your total effective rate could be 1.5% or higher depending on where you live.
The easiest way to find your exact rate is to look at your property tax bill, which breaks down each component. If you do not have a recent bill, contact your county assessor's office directly — they can tell you the rate for your specific address. County assessor websites often have rate tables organized by city or district, though the format varies by county.
What assessed value means and how Proposition 13 affects it
Your property tax bill is not based on what your house is worth on the open market — it is based on an assessed value that the county assessor sets. When you buy a property, the assessor typically sets the assessed value at or near the purchase price. From that point forward, Proposition 13 limits how much the assessed value can rise: no more than 2% per year, regardless of how much the property's market value increases.
This means a house purchased in 1990 for $200,000 might have an assessed value of around $500,000 today, even if it would sell for $1.2 million. A house purchased last year for $1.2 million would have an assessed value close to that purchase price. Both houses sit on the same street and have similar features, but the older property pays property tax on a much lower assessed value. The assessed value resets to current market value only when the property changes ownership or when certain major improvements are made.
When your assessed value changes
Your assessed value increases by up to 2% each year automatically under Proposition 13, but it can jump significantly in specific situations. The most common trigger is a change in ownership — when you buy a property, the assessor reassesses it at the new purchase price. This is why property taxes often rise sharply after a sale, even if nothing physical changed about the house.
Major home improvements can also trigger reassessment. Adding a room, replacing the roof, or installing a new foundation may cause the assessor to increase the assessed value. Routine maintenance like painting or replacing windows typically does not. If you make improvements, the assessor may send an inspector to your property, or you may need to report the work yourself depending on your county's process. Some counties require building permits for any work that triggers reassessment, which creates a paper trail the assessor uses.
How to find your county's specific tax rate
Your property tax rate is public information, but it is not published in one central place — each county maintains its own records. The fastest method is to check your property tax bill, which lists your tax rate as a percentage and often breaks it into components (base rate, school district, county services, and so on). If you do not have a bill, search online for "[Your County Name] assessor" and look for a property tax rate table or assessment information page.
You can also call your county assessor's office directly and provide your property address. They will tell you the current tax rate for your location. Some counties offer online lookup tools where you enter your address and see the rate when ready. The California State Board of Equalization publishes statewide data on effective tax rates by county, which shows the average rate in each area, but your individual rate depends on your specific location within the county.
Differences between counties and cities
Tax rates vary widely across California. Coastal counties and areas near major cities tend to have higher assessed values and sometimes higher add-on rates, but this is not a fixed rule. A property in a rural county might have a lower assessed value but a higher local tax rate if that county funds schools or services through property tax more heavily than a coastal county does. There is no straightforward pattern — you must check your specific location.
Some cities have incorporated their own tax districts, which add another layer to your bill. An unincorporated area of a county might have a different rate than a city within the same county. Your property tax bill shows all of these components, so the bill itself is the most reliable source for what you actually pay.
Frequently Asked Questions
Why did my property tax bill go up if I did not sell my house?
Your assessed value increases by up to 2% each year under Proposition 13, so your tax bill rises even without a sale. If the increase was much larger than 2%, the county may have reassessed your property due to major improvements, a change in ownership (if you recently bought it), or a correction to a previous assessment error. Check your bill for the reason or contact your county assessor.
Can I lower my assessed value?
You can file a Proposition 8 appeal if you believe your assessed value is higher than the property's current market value. This is most common after a market downturn. You will need to provide evidence of the property's actual value, such as recent comparable sales or an appraisal. The process and important date vary by county — contact your county assessor for the specific steps and timeline.
Does California have property tax exemptions?
Yes, certain properties are exempt from property tax, including owner-occupied homes for some seniors and disabled persons, agricultural land under specific conditions, and religious or charitable organizations. Exemptions vary by county and have strict income and ownership requirements. Contact your county assessor to learn whether your property might may have access to.
What happens if I do not pay my property tax bill?
If property taxes go unpaid, the county can place a lien on your property and eventually foreclose. The process takes time — typically several years — but unpaid taxes accumulate penalties and interest. If you cannot pay in full, contact your county tax collector about payment plans or hardship options before the bill becomes delinquent.
How often does the county reassess property values?
The county assessor reassesses all properties annually for the 2% increase allowed under Proposition 13. A full reassessment at market value happens when the property is sold or when major improvements are made. Some counties conduct periodic reviews of all properties to catch assessment errors, but this is separate from the annual 2% adjustment.