Property Tax Estimator

What Will Your Property Taxes Be?

Estimate annual taxes for any Peninsula home, including Mello-Roos and supplemental assessments.

Tax Estimator

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Assessed Value (Prop 13)
Base Property Tax Rate 1.0%
Base Tax
City/County Special Assessments

Estimated Annual Tax
Estimated Monthly Tax

Proposition 13: Under Proposition 13, your assessed value can only increase up to 2% per year, regardless of market appreciation. A home purchased at today will be assessed at approximately next year.
This tool provides estimates for general information only and does not constitute a professional appraisal, financial advice, or guarantee of accuracy. Lisa M. Lum and Coldwell Banker Realty do not warrant the accuracy or completeness of this information. Actual costs, values, and tax amounts may vary. Consult a licensed appraiser, CPA, or financial advisor for professional guidance. User assumes all risk.
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Understanding Silicon Valley Property Taxes

What is Proposition 13?

Passed in 1978, Proposition 13 caps the base property tax rate at 1% of the assessed value at the time of purchase. It also limits annual increases in assessed value to no more than 2%, regardless of how much the property appreciates in market value. This means long-time homeowners often pay significantly less in property taxes than someone purchasing the same home today. When a property is sold, it is reassessed at the current purchase price.

What is Mello-Roos?

A Mello-Roos Community Facilities District (CFD) is a special tax district that funds local infrastructure and services such as schools, roads, parks, and fire stations. Mello-Roos taxes are most common in newer developments and can add anywhere from $2,000 to $10,000 or more per year on top of your regular property taxes. Unlike standard property taxes, Mello-Roos assessments are a fixed amount (not based on your home's value) and typically expire after 20 to 40 years.

What about supplemental taxes?

When you purchase a property in California, you will receive a supplemental tax bill that covers the difference between the previous owner's assessed value and your new purchase price, prorated from the date of sale to the end of the fiscal year (June 30). This is a one-time adjustment, not an annual charge. Depending on when you close, you may receive one or two supplemental bills within six months of purchase. These bills are in addition to the regular annual property tax shown above.

Want a precise tax estimate for a specific property?

Lisa can pull the exact tax records for any property on the Peninsula. Send your details and she will follow up with a detailed breakdown.

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