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Assessed values of local properties rises 6.82 percent
assessed value

The assessed valuation of Stanislaus County properties increased by 6.82 percent, or $61.6 billion, over the 2021-22 roll, announced Assessor Don H. Gaekle.

The increases seen in the 2022-23 Stanislaus County Regular Assessment Roll, resulted from properties being reassessed to changes in ownership, new construction, the annual review of decline in value properties and the mandated CPI increases on Proposition 13 base values. The 2022-23 inflation adjustment is the maximum two percent.

The percentage roll growth significantly exceeded the growth in the prior year for all cities and the unincorporated area.

Turlock experienced a 6.71% percent increase. The highest increase was seen in Waterford at 10.49% and lowest was Ceres at 5.50%.

The 2021 calendar year saw strong demand for residential property in Stanislaus County as in the rest of the country.

Assessments on business property for the unsecured roll increased by 6.82 percent for the fiscal year 2022-23.

A county assessor is mandated to establish assessed values each year for all taxable real property, including residences, mobile homes, boats, airplanes and business personal property. This includes review of properties where the market value may be lower than the property’s Proposition 13 factored base value. The current roll reflects activity occurring during calendar year 2021 and the resulting assessed valuations are effective as of the Jan. 1, 2022 lien date.

“Where needed, we will review and adjust property assessments to ensure that assessed values are at the lower of a property’s Prop 13 factored base value, or its current market value for Jan. 1, 2022 lien date,” said Gaekle.

Proposition 13 required that assessors establish a “Factored Base Year Value” for all real property that existed as of the 1975 lien date. It also requires the reassessment, at market value, of any portion of a property that it changes ownership or is newly constructed after the 1975 lien date. Proposition 8, also passed in 1978, requires that the assessor enroll the lower of the current market value of a property on any given Jan. 1, or its Proposition 13 Factored Base Value.

The 2022-23 roll contains over 180,000 assessment units of real and personal property, upon which property taxes are levied. The assessment roll will produce approximately $616 million in revenue to be shared by public schools, the county, cities and special districts.

The county no longer mails out annual value notices, a practice approved by the Board of Supervisors in 2011 to save more than $25,000 annually and over $325,000 since inception. But taxpayers may view their 2022-23 assessed property value(s) online by visiting the Assessor Value Notice Inquiry under the Services tab at 

Taxpayers with questions about their assessed value may call the Assessor’s Office at (209) 525-6461 or visit in person at 1010 10th Street, 2nd Floor, Suite 2400, Modesto, between the hours of 8 a.m. and 4:30 p.m. weekdays.

Annual assessments may be appealed until Nov. 30, 2022. Applications for appeals are available from the Clerk of the Assessment Appeals Board at 1010 10th Street, 6th Floor, Suite 6700, Modesto CA 95354 or on their website at or call (209) 525-6414.