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Property tax guide

Contra Costa County property taxes

Contra Costa County homeowners can use assessment reviews, comparable sales, and available exemptions to challenge over-assessments. Start with a fast savings check, then get a ready-to-file packet for your local assessor.

Check My Savings
0.82%Estimated effective tax rate
Often Sept. 15 or Nov. 30 by countyAppeal deadline
$5,694Estimated annual tax bill

Reduce your assessment

Lower property taxes in Contra Costa County.

Your assessment may be higher than the current market supports, or you may be missing exemptions that reduce taxable value. Lower Property Tax reviews the property, compares available market data, and prepares a packet you can print, sign, and mail.

Estimated median home value$695,200
Estimated average savings$1,139
Client savingsKeep 100%
Lowering taxes since2009

Local property tax update

Contra Costa County homeowners should watch assessment changes around Concord.

Contra Costa County homeowners should review whether local sales support the assessed value, especially across different East Bay submarkets.

Local focus East Bay suburban values and local comparable sales.
What to review Assessment notice, property record, exemptions, condition issues, and recent comparable sales.
Why it matters Even in the same county, values can vary by city, school district, neighborhood, property condition, and exemption status.

For Contra Costa County, compare your property against homes in the same local market whenever possible instead of relying only on broad California trends.

What affects your bill

Assessment, exemptions, and comparable sales.

Local property tax bills are driven by assessed value, the tax rate, exemption eligibility, and county appeal rules. Comparable sales and property condition issues may help support a lower assessment.

  • Review whether the assessed value is supported by market data.
  • Look for homestead, senior, veteran, disability, or local exemptions.
  • Prepare instructions for where and when to send the appeal packet.

Property tax calculator

Estimate your annual tax bill.

Estimated annual tax bill $5,694 Average annual savings: $1,139

FAQ

Contra Costa County property tax FAQ

What is the estimated average property tax bill in Contra Costa County?

Our preliminary model estimates an average annual bill of about $5,694. Your actual bill depends on your assessment, exemptions, millage/tax rate, and local rules.

Can I keep all of my savings?

Yes. Lower Property Tax uses a flat packet price and you keep 100% of any property tax savings.

What do I get after my review?

You receive a ready-to-file assessment appeal packet with comparable property data, mailing instructions, and next steps. Print, sign, and mail.

County assessor

Contra Costa County tax assessor page

Use the county assessor, property appraiser, appraisal district, or assessment office to review public property records, assessment notices, exemption rules, and local appeal instructions.

Open county tax assessor page

City property tax topics

Popular city searches in California.

We work with all counties, cities, townships and municipalities.

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More California counties

Other county property tax guides.

Alameda County 0.69% rate • $5,748 est. bill Alpine County 0.90% rate • $6,866 est. bill Amador County 0.78% rate • $5,402 est. bill Butte County 0.74% rate • $4,807 est. bill Calaveras County 0.68% rate • $5,740 est. bill Colusa County 0.62% rate • $5,742 est. bill Del Norte County 0.53% rate • $5,254 est. bill El Dorado County 0.55% rate • $6,160 est. bill

View all California counties →

Check your property tax savings.

Enter your address and see your preliminary annual savings estimate.

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