ROSEMEAD — The Rosemead assessment roll reached $6.748 billion in 2026, strengthening the taxable property base that supports public agencies. The total increased nearly $309 million from last year, according to figures from the Los Angeles County Assessor’s Office.
Rosemead’s assessed valuation rose from $6.440 billion in 2025, an increase of about 4.8%. The growth reflects changes across the city’s entire property tax base. It does not mean each homeowner’s assessment or tax bill increased by 4.8%.
Rosemead Assessment Roll Reflects Taxable Values
California’s Proposition 13 generally limits annual increases in a property’s taxable value. A property’s purchase price typically establishes its base-year value after a change in ownership.
In later years, the assessed value generally can increase by no more than 2% annually or inflation, whichever is lower. A change in ownership or new construction can trigger reassessment.
The California State Board of Equalization explains California’s acquisition-value property tax system in its property tax guidance: https://www.boe.ca.gov/proptaxes/pdf/pub29.pdf
As properties sell, undergo construction or receive annual adjustments, their assessed values can contribute to overall roll growth. Longtime homeowners may still have assessments well below their homes’ current market values.
That distinction matters when interpreting Rosemead’s citywide increase. The Rosemead assessment roll measures taxable assessed value, not the combined market value of properties across the city.
Assessment Includes Homes And Businesses
Rosemead’s 2026 assessment roll includes 10,800 assessed parcels, according to the figures provided. Single-family residential properties account for 7,765 parcels.
Another 2,153 parcels are classified as residential income properties. Commercial and industrial properties account for 882 parcels.
Growth within any of those categories can increase the citywide assessment roll. Sales and new construction can establish new taxable values. Annual Proposition 13 adjustments also contribute to changes in the roll.
The basic property tax rate under Proposition 13 is generally 1% of assessed value. Tax bills can also include voter-approved debt and other assessments.
Using 1% only as a reference, the $308.7 million increase could represent about $3.09 million in additional gross property tax levy. That does not mean Rosemead city government receives the entire amount.
Property tax revenue is distributed among cities, counties, school districts and other local agencies under state allocation rules.
Growing Tax Base Supports Public Agencies
For residents, the assessment roll offers a broader measure of Rosemead’s taxable property base. Its growth can support revenue for government services, schools and other public agencies serving the community.
Individual homeowners should look to their own assessed values when evaluating their property taxes. Residents can review property information through the Los Angeles County Assessor’s Office: https://assessor.lacounty.gov/
Rosemead’s $6.75 billion roll shows that the community’s taxable property base continued expanding in 2026. That growth can strengthen the revenue foundation shared among public agencies serving Rosemead residents.
