Property values throughout Riverside County rose an aggregate 5.86% last year, with houses making up the largest share of the valuation, according to a report the Board of Supervisors will review next week.

The county’s property tax assessment roll for the most recent base year, valued as of Jan. 1, was $302.7 billion, compared to $286 billion in the Jan. 1, 2018, assessment, according to the Assessor-Clerk-Recorder’s Office.

The assessment roll represents the composite value of all commercial and residential real estate within the county, as well as other property, including boats, aircraft and timeshares. The roll has increased for the last seven consecutive years. During the Great Recession, $38 billion in value was lost, with assessments bottoming out at $204.8 billion in tax year 2012, according to the assessor’s report, which will be presented for the board’s consideration during its consent agenda Tuesday.

The roll was valued at $242.9 billion in 2008, before the deflationary cycle triggered by the economic downturn.

Single-family residences represented $185.37 billion, or 61%, of the roll, figures showed. Commercial real estate was second highest at $61 billion, or 20%, of the countywide assessment.

Data reflected that aggregate property values increased by the widest margin, in percentage terms, in the unincorporated part of Menifee, where valuations totaled $1.12 billion, compared to $960 million the year before — translating to a 17% jump.

Among incorporated municipalities, Beaumont showed the strongest percentage growth at 11%. According to data, the city’s valuations totaled $5.2 billion, compared to $4.7 billion during the prior base year calculation.

The city of Riverside had the highest net taxable value — $31.55 billion — of all the cities and unincorporated areas listed on the roll.

Of the five supervisorial districts, the fourth district, which stretches from Whitewater to the Arizona state line, south to the Salton Sea and north through Joshua Tree National Park, comprised the biggest chunk of the roll value at 28%.

According to the assessor’s office, property tax bills for 2020 will start going out in October.

Homeowners have the right to appeal any increased assessment. More information is available at the Assessor-Clerk-Recorder’s website: www.asrclkrec.com/ .

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