Contra Costa County annual CPI rate changes from 1.3% to 3.8%.

Source-backed update detail with effective dates, official citation, and calculator impact. This is the page to link from LinkedIn, email, and customer notes.

Contra Costa County updates Check a property

Updates/Contra Costa County/Annual CPI rate

Contra Costa CountyAnnual CPI rateVerified May 18, 2026

Previous value

1.3%

New value

3.8%

Effective

Aug 1, 2026

Ends

Jul 31, 2027

Source status

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What changed

Contra Costa County annual CPI rate changes from 1.3% to 3.8%.

Calculator impact

RentRight uses this source-backed annual CPI rate for calculations with an effective date on or after 2026-08-01 when the jurisdiction and rules apply.

This page is informational. Run the calculator for a property-specific answer before relying on the value for a notice or portfolio workflow.

Official source

RentRight keeps the official source link attached so a property manager can inspect the underlying publication.

Bureau of Labor Statistics - AB 1482 CPI-U SF-Oakland-Hayward April Series

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/rent-control-updates/contra-costa-county/2026-08-01-annual-cpi-rate-3-8-percent-3123a8fc