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Prop 13 and California property tax basics

A simple starting point for base-year value, the 1 percent tax limit, reassessment, and why your county assessor matters.

Last reviewed June 29, 2026

Think of Prop 13 like the starting line for many California property-tax bills. In most cases, your assessed value starts when the property changes ownership or new construction is finished.

After that, the assessed value usually cannot rise more than 2 percent per year under Prop 13. The tax rate is generally limited to 1 percent plus voter-approved debt and local charges.

The important warning: your bill is still local. Your county assessor handles assessed value, and your county tax collector handles the bill.

First moves

  1. 1

    Find your county assessor before trusting any estimate.

  2. 2

    Look for the property's assessed value, not only the market value.

  3. 3

    If you just bought, inherited, added, rebuilt, or transferred property, check whether reassessment rules apply.

Watch for

  1. 1

    A sale is not the only thing that can count as a change in ownership.

  2. 2

    A temporary decline-in-value assessment can later rise by more than 2 percent until it reaches the factored base-year value.

  3. 3

    Special assessments, bonds, and direct charges can make the bill higher than the basic 1 percent idea.

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