Williams, Colusa County, California Property Taxes

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Property Taxes in Williams, California

Median Williams, California effective property tax rate: 1.14%, significantly lower than the national median of 1.02%, and lower than the California state median of 1.21%.
Median Williams, California home value: $202,472
Median annual Williams, California tax bill: $2,331, lower than the national median property tax bill of $2,400.

How are property taxes in Colusa County calculated?

Property taxes in Williams, California 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 Williams's property tax system, exemptions, and reduction opportunities can lead to significant savings. Regardless of where you live in Williams, knowing local tax details benefits homeowners and investors.

Last Updated April 13, 2026

Williams, Colusa County, California Property Tax Bill Calculator

Property Assessed Value

$100,000

$1,500,000

$3,000,000

Median Effective Tax Rate

1.14%

Estimate Property Tax Bill

$2,308

$2,142

How Does the Williams Property Tax Calculator Work?

Use this Williams property tax calculator to estimate your annual property tax bill. Enter your property’s assessed value and our calculator applies Williams’ median effective tax rate of 1.14% — based on actual property records in Colusa County — to generate your estimate.

Enter your property’s estimated assessed value — the figure the local assessment system uses to calculate your bill, which reflects any exemptions you hold and is typically lower than your home’s market value. Our calculator applies Williams’ median effective rate across all local levies, providing a more accurate estimate than applying a single county millage rate.

Your bill may vary by ZIP code within Williams: rates range from 1.14% in 95987 to 1.14% in 95987, primarily due to differences in school district levies and local assessment districts.

For a more precise estimate, scroll down to explore ZIP code-level tax rate trends across Williams.

About Williams Property Taxes

About Property Taxes in Williams, Colusa, California

Williams’s median effective property tax rate of 1.14% is lower than the California state median of 1.21% and higher than the national median of 1.02%. This rate reflects the Colusa County base levy combined with local school district levies and other local assessments that can affect what homeowners pay.

Property tax rates are not uniform across Williams. Homeowners in the 95987 ZIP code carry a median effective rate of 1.14%, and the same ZIP also shows the city’s median tax bill of $2,331. Understanding how your assessed value and local levies are set can make a meaningful difference to your annual property tax bill.

Williams homeowners who believe their assessed value is too high can file a formal appeal with the Colusa County Tax Assessor before the November 30, 2026 deadline each year.

If your estimated bill seems higher than expected, Ownwell can review your assessment and protest on your behalf. You only pay if we save you money.

Property Tax Rates Across Williams, Colusa County, California

As noted earlier, local government entities set tax rates, which can vary widely within a state.

Why? Because annually, each county 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 there are votes and laws involved in setting tax rates and budgets, in a nutshell, this is the annual process.

Below, you can compare Williams's effective property tax rate to other cities in California and the median property tax rates in California and the U.S.

Property Tax Rates Across Williams, Colusa County, California

Source: Ownwell

1.03%

1.14%

1.26%

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 Williams Tax Rate

1.14%

Median Effective Colusa County Tax Rate

1.14%

Median Effective California Tax Rate

1.21%

Median Effective United States Tax Rate

1.02%

Property Tax Rates Across Williams, Colusa County, California

Zip	10th Percentile	25th Percentile	Median Tax Rate	75th Percentile	90th Percentile
95987	1.08%	1.09%	1.14%	1.19%	1.26%

Source: Ownwell

Property Tax Assessment Values Across Williams, Colusa County, California

When examining property taxes in Williams, California, 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 Colusa 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.

Assessment notices:

In Colusa County, assessment notices are sent in the spring each year. They'll typically reach your mailbox by the middle of May.

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 Williams.

For example, the median home price in Williams is $202,472, with tax bills ranging significantly across the county. 95987 has the highest median home price at $202,472.

Property Tax Assessment Values Across Williams, Colusa County, California

Source: Ownwell

$89,555

$155,584

$221,612

Median Williams Market Value

$202,472

Median Colusa County Market Value

$188,260

Median California Market Value

$427,605

Median United States Market Value

$235,294

Property Tax Assessment Values Across Williams, Colusa County, California

Zip	10th Percentile	25th Percentile	Median Home Price	75th Percentile	90th Percentile
95987	$89,356	$133,124	$202,472	$288,621	$359,000

Source: Ownwell

Property Tax Bills Across Williams, Colusa County, California

Property tax bills in Williams are based on the assessed value of a home, not its market price alone. Local tax rates are then applied to that assessment to determine the amount owed each year. Factors such as property characteristics, location, and any applicable exemptions can influence the final bill, which means two similar homes may not be taxed the same.

With a median home price of $202,472, the typical property tax bill in Williams is $2,331, which is slightly below the national median property tax bill of $2,400. Bills can vary widely, with the 25th percentile at $1,427 and the 75th percentile at $3,358. At the high end, the 90th percentile reaches $4,174.

For homeowners, this means property taxes can represent a meaningful ongoing cost tied directly to how the home is assessed. Understanding how the bill is calculated can help homeowners better anticipate changes and plan for annual housing expenses.

Property Tax Bills Across Williams, Colusa County, California

Source: Ownwell

$1,041

$1,833

$2,625

Median Williams Tax Bill

$2,331

Median Colusa County Tax Bill

$2,133

Median California Tax Bill

$5,134

Median United States Tax Bill

$2,400

Property Tax Bills Across Williams, Colusa County, California

Zip	10th Percentile	25th Percentile	Median Tax Bill	75th Percentile	90th Percentile
95987	$860	$1,427	$2,331	$3,358	$4,174

Source: Ownwell

Don't miss the deadline to appeal!

Dates
Appeal Deadline	November 30

Links
Colusa Tax Assessor
Website	assr.parcelquest.com

Frequently Asked Property Tax Questions in Williams, California

How are property taxes calculated in Williams, California?

Property taxes in Williams, California are calculated by multiplying your property's assessed value by the applicable tax rate set by local taxing authorities. The assessed value is determined by the county assessor and may differ from your property's market value depending on local assessment ratios and exemptions.

How do I appeal my property taxes in Williams, California?

To appeal your property taxes in Williams, California, you typically need to file a formal protest or appeal with your local appraisal district or assessor's office by the stated deadline. You'll need evidence such as comparable sales, a recent independent appraisal, or documentation of property condition issues. Ownwell can handle this entire process for you.

What property tax exemptions are available in Williams, California?

Common property tax exemptions in Williams, California include homestead exemptions for primary residences, senior citizen exemptions, veteran exemptions, and disability exemptions. Exemption amounts and eligibility requirements vary by county. Contact your local appraisal district or check Ownwell for details specific to your property.

When are property taxes due in Williams, California?

Property tax deadlines in Williams, California vary by county but typically include an assessment notice period in spring or early summer, followed by an appeal deadline, and a tax payment due date in the fall or winter. Check with your county assessor's office for specific dates in your area.

How can Ownwell help reduce my property taxes in Williams, California?

Ownwell provides professional property tax appeal services in Williams, California. Our team analyzes your assessment, gathers evidence, files all paperwork, and represents you at hearings — all with no upfront cost. You only pay a percentage of your savings if we successfully lower your tax bill.