South San Francisco, San Mateo County, California Property Taxes
Median South San Francisco, CA effective property tax rate: 1.19%, significantly higher than the national median of 1.02%, but lower than the California state median of 1.21%.
Median South San Francisco, CA home value: $522,016
Median annual South San Francisco, CA tax bill: $6,230, $3,830 higher than the national median property tax bill of $2,400.
How are property taxes in San Mateo calculated?
Property taxes in South San Francisco, CA are calculated based on the tax assessed value, which is often lower than the actual market value due to property tax exemptions such as the homestead or senior exemption.
Understanding South San Francisco’s property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in South San Francisco, knowing local tax details benefits homeowners and investors.
Last Updated March 1, 2025
South San Francisco, San Mateo County, California Property Tax Bill Calculator
$100,000
$1,500,000
$3,000,000
Median Effective Tax Rate
1.19%
Estimate Property Tax Bill
$6,212
$5,765
$1,102
Average Tax Savings
Property Tax Rates Across South San Francisco, San Mateo County, California
Local government entities set tax rates, which can vary widely within a state. This is because each county annually estimates its required budget to provide services and divides that by the total value of all taxable property within its jurisdiction. This calculation results in the property tax rate. While votes and laws play a role in setting tax rates and budgets, this is the annual process in a nutshell.
In South San Francisco, located in San Mateo County, the effective property tax rate is 1.19%. This rate is higher than the national median property tax rate of 1.02%. South San Francisco's rate also aligns with the highest and lowest median tax rates within its ZIP code, 94080, indicating consistent property tax assessments across the area. When comparing this rate to other cities in California, homeowners in South San Francisco may pay more in property taxes relative to the national average. However, this investment contributes to the robust public services and infrastructure that residents enjoy. Understanding these dynamics can help homeowners make informed decisions about property investments and tax appeals.
Property Tax Rates Across South San Francisco, San Mateo County, California
Source: Ownwell

1.08%
1.30%
1.52%
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective South San Francisco Tax Rate
1.19%
Our median effective property tax rate (tax bill ÷ assessor's market value) accounts for exemptions and deductions, making it more accurate than the general median tax rate, which is the midpoint of statutory rates before adjustments.
Median Effective San Mateo County Tax Rate
1.26%
Median Effective California Tax Rate
1.21%
Median Effective United States Tax Rate
1.02%
Property Tax Rates Across South San Francisco, San Mateo County, California
Zip | 10th Percentile | 25th Percentile | Median Tax Rate | 75th Percentile | 90th Percentile |
---|---|---|---|---|---|
94080 | 1.11% | 1.14% | 1.19% | 1.32% | 1.76% |
Source: Ownwell
$1,102
Average South San Francisco Tax Savings
Save on your property taxes & more with Ownwell
Property Tax Assessment Values Across South San Francisco, San Mateo County, California
When examining property taxes in South San Francisco, CA, understanding the distinction between "market value" and "assessed value" is crucial. The market value is what a willing buyer would pay to a willing seller in an open and competitive market, often influenced by location, property condition, and economic market trends. The San Mateo County appraisal district estimates the market value for tax purposes. The assessed value is the market value minus any applicable exemptions or limits determined by local laws and offerings. The tax assessed value is the figure used to calculate your property taxes or the amount multiplied by your tax rate to get your tax bill.
In San Mateo County, assessment notices are sent in the spring each year. They’ll typically reach your mailbox by the middle of March. Each property owner receives an assessment notice that contains both the market value and assessed value, along with an estimate of your property tax bill. By providing insights into how assessed and market values are determined, this section helps property owners navigate their tax responsibilities and understand the valuation processes affecting their property taxes in South San Francisco. For example, the median home price in South San Francisco is $522,016, with tax bills ranging significantly across the county. Zip code 94080 has the highest median home price at $522,014.
Property Tax Assessment Values Across South San Francisco, San Mateo County, California
Source: Ownwell

$377,686
$1,981,044
$3,584,402
Median South San Francisco Market Value
$522,016
Median San Mateo County Market Value
$685,382
Median California Market Value
$378,421
Median United States Market Value
$235,294
Property Tax Assessment Values Across South San Francisco, San Mateo County, California
Zip | 10th Percentile | 25th Percentile | Median Home Price | 75th Percentile | 90th Percentile |
---|---|---|---|---|---|
94080 | $108,690 | $267,140 | $522,014 | $799,840 | $1,075,896 |
Source: Ownwell
$1,102
Average South San Francisco Tax Savings
Save on your property taxes & more with Ownwell
Property Tax Bills Across South San Francisco, San Mateo County, California
Property Tax Bills Across South San Francisco, San Mateo County, California
Source: Ownwell

$4,534
$22,825
$41,115
Median South San Francisco Tax Bill
$6,230
Median San Mateo County Tax Bill
$8,692
Median California Tax Bill
$4,683
Median United States Tax Bill
$2,400
Property Tax Bills Across South San Francisco, San Mateo County, California
Zip | 10th Percentile | 25th Percentile | Median Tax Bill | 75th Percentile | 90th Percentile |
---|---|---|---|---|---|
94080 | $1,860 | $3,512 | $6,226 | $9,189 | $12,168 |
Source: Ownwell
$1,102
Average South San Francisco Tax Savings
Save on your property taxes & more with Ownwell
Don't miss the deadline to appeal!
Dates | |
---|---|
Property Valuation Date | January 1 |
Appeal Deadline | December 1 |
Tax Bill | |
Issued | October 1 |
Due Date #1 | December 10 |
Due Date #2 | April 10 |
Links | |
---|---|
San Mateo Tax Assessor | |
Website | county-taxes.net |
Save money on your property taxes with Ownwell

Enter your address.
With just your address Ownwell will analyze your property expenses to find you savings using real time market data, local expertise and AI.

Answer some questions.
The more we know about your property, the more we can save you. There's no up-front costs, it's risk-free to sign up. Only pay if you save!

Unlock your savings.
We gather evidence, file all documentation, and attend hearings on your behalf year after year, so you never overpay again.