California is known for a lot of things, but affordable housing isn’t often among them. What catches many homeowners and prospective buyers off guard is that property taxes in the state can quietly eat into thousands of dollars a year, even though California’s effective tax rates look fairly modest on paper. The reality is that when you’re taxing even a small percentage of a million-dollar home, bills add up fast, and in some counties they climb faster than most people ever expect.
Under Proposition 13, California’s base property tax is capped at 1% of a home’s assessed value, which is locked in at the time of purchase and can only increase by a maximum of 2% per year. For long-term homeowners, this is genuinely taxpayer-friendly. Once you add in voter-approved bonds, Mello-Roos districts, and local assessments, however, effective property tax rates can jump to 1.1% and as high as 1.5% depending on where you live.
Proposition 13’s framework has also been reshaped by Proposition 19, passed by voters in November 2020 and in effect since February 16, 2021. Under Prop 19, children can no longer automatically inherit a parent’s low property tax base. To keep it, heirs must move into the inherited home as their primary residence within one year of the transfer, and the exclusion is now capped at roughly $1,044,586 above the parent’s factored base year value (for transfers between February 2025 and February 2027, adjusted for inflation every two years). Investment properties, vacation homes, and rental properties are fully reassessed to market value upon inheritance. A ballot initiative called “Fix Prop 19 to Save Our Children’s Future” began circulating petitions in late 2025 and, if enough valid signatures are gathered, could appear on the November 2026 ballot. Two prior repeal efforts in 2022 and 2024 did not qualify.
For new home buyers, the assessed value resets to the full market price, meaning the tax bill is calculated on what you paid. The result is a wide gap between counties, and those at the top of the list share one thing in common: very expensive homes.
Why Low Rates Still Mean Big Bills in California
If you look only at effective property tax rates, California seems like a bargain. The statewide average effective rate is approximately 0.71%, well below the national average of around 0.89%. The reason California still ranks among the costliest states for total property taxes paid is straightforward: home values are extraordinary. When the median home in San Mateo County sits above $2 million, even a 0.68% effective tax rate can produce a $4,424 annual tax bill.
The comparison with other states tells the story plainly. A homeowner in a state with a 2% rate but a $250,000 home pays $5,000 a year. California’s low rate is more than offset by the sheer cost of the homes underneath it.
Worth noting for eligible homeowners: starting January 1, 2025, Senate Bill 23 provides full property tax exemptions for California veterans who are 100% disabled due to service-related injuries, applying to their primary residence through January 1, 2035.
10. Orange County
Laguna Beach has some of the highest property taxes in California.
- $3,404 Median Annual Property Tax
Orange County ranks 10th on this list, with a median home value of around $1.2 million and an annual property tax bill of approximately $3,404. Communities like Newport Beach, Irvine, and Laguna Beach keep tax bills substantial, and Mello-Roos districts in places like Irvine push effective rates as high as 1.8% for new buyers when all assessments are counted. The county also gained policy relevance in early 2025 after Governor Gavin Newsom’s executive order extended 2025 property tax payment deadlines to April 10, 2026 for homeowners in fire-affected Los Angeles ZIP codes just to the north, a reminder that California’s property tax calendar is not always fixed.
9. Placer County
- $3,441 Median Annual Property Tax
Placer County may be a surprising name on this list. Median home values in the county hover around $682,000, well below those in coastal markets, yet its $3,441 median property tax reflects an effective rate of around 0.88%, which is higher than many of the state’s pricier coastal areas. Cities like Roseville and Rocklin anchor the county’s suburban core, while the Lake Tahoe foothills bring in a resort market where Mello-Roos charges routinely push the tax burden higher.
8. Santa Cruz County
- $3,661 Median Annual Property Tax
With a median home value of around $1.2 million and a median property tax of $3,661, Santa Cruz County carries an effective rate near 0.70%. The county’s mix of coastal communities and university towns keeps prices elevated year-round. Wildfire risk, which has grown across the Santa Cruz Mountains in recent years, adds to the overall cost of ownership through higher insurance premiums on top of the tax burden.
7. San Benito County
- $3,716 Median Annual Property Tax
San Benito County is a genuinely unexpected entry. With a median home value of around $755,000, it sits below many coastal markets in pure price terms, yet its $3,716 median property tax implies an effective rate of around 0.93%, higher than most Bay Area counties. The explanation lies largely in new residential development in Hollister, where builders routinely establish Mello-Roos community facilities districts that attach long-term special assessments to newly built homes.
6. Contra Costa County
- $3,883 Median Annual Property Tax
Contra Costa County sits in the outer Bay Area with a median home value of around $889,000, significantly more affordable than San Francisco or San Mateo. Its $3,883 median property tax bill still earns it a spot on this list, driven by an effective rate of 1.15% that reflects meaningful local bond and assessment add-ons. Cities like Walnut Creek and Concord have passed repeated school and infrastructure bond measures that stack on top of the Prop 13 base rate.
5. Alameda County
Alameda County is home to both Oakland and Berkeley.
- $3,993 Median Annual Property Tax
Home to both Oakland and Berkeley, Alameda County has a median home value of around $1.19 million and a median property tax of $3,993. That produces an effective rate of 1.21%, among the highest in the Bay Area. The elevated rate reflects both local bond measures and parcel taxes, the latter of which Berkeley and Oakland voters have approved in unusually large numbers to fund schools and public services, driving bills noticeably above the statewide norm.
4. San Francisco County
- $4,311 Median Annual Property Tax
San Francisco occupies a unique position as both a city and a county, meaning its tax decisions are concentrated rather than spread across a larger jurisdiction. Median home values sit near $1.8 million, producing a median tax bill of around $4,311. Voter-approved bonds for transit, schools, and infrastructure layer onto the 1% base rate, bringing the effective rate to around 1.18%. Despite a well-publicized wave of commercial vacancies and remote-work migration in recent years, residential property values in San Francisco have remained resilient enough to keep the city in the top tier for property tax bills.
3. San Mateo County
- $4,424 Median Annual Property Tax
San Mateo County claims some of the highest median home values in the state, with the typical home priced above $2 million, yet its median property tax sits at only $4,424. This is Prop 13’s most vivid demonstration: many owners in Menlo Park, Redwood City, and Atherton purchased decades ago and are assessed at a small fraction of current market value. Prop 19 has complicated the inheritance side of this picture, since heirs who don’t move into inherited homes are now fully reassessed at market value, likely generating a steady stream of higher-assessed transactions over time as estates change hands.
2. Santa Clara County
- $4,694 Median Annual Property Tax
At the heart of Silicon Valley, Santa Clara County has a median home value of $1.94 million, which accounts for its median annual property tax of $4,694. The effective rate of 0.75% is a product of Prop 13 keeping long-term owner assessments well below market, since buyers in San Jose, Cupertino, or Palo Alto who purchased in the past five years face a radically different tax reality than neighbors who bought in the 1990s. The gap between veteran owners and recent buyers continues to widen as prices rise.
1. Marin County
Marin County is home to California’s most expensive property taxes.
- $5,500 Median Annual Property Tax
Marin County holds the top spot for the highest median annual property tax bill in California and has done so for years. Median home prices sit around $1.47 million, and the county’s 0.63% effective rate, one of the lowest in the state, still produces the highest median tax bill at $5,500 per year. That is the direct result of extraordinary property values in communities like Tiburon, Mill Valley, and Ross, where individual sales routinely exceed $5 million. For buyers entering Marin’s market today, the assessed value resets to the full purchase price, meaning the $5,500 median will continue to rise as the county’s luxury homes turn over.
Editor’s note: This article was updated to reflect the statewide effective property tax rate of 0.71% and the national average of approximately 0.89%, both revised from earlier figures. Context was added on Proposition 19, including the current $1,044,586 inheritance exclusion cap (in effect February 2025 through February 2027), the active ballot initiative to repeal Prop 19’s inheritance restrictions, Governor Newsom’s executive order extending 2025 property tax deadlines for fire-affected Los Angeles homeowners, and the Senate Bill 23 full property tax exemption for 100% service-disabled veterans that took effect January 1, 2025.
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