Base Year Value

Base year value is a property's assessed value at the time of the most recent reassessment event (acquisition, new construction). Serves as the starting point for Prop 13's 2% annual growth cap.

What it means in practice

When a property changes ownership or completes new construction, its base year value resets to the current fair market value. From that point, assessed value grows at max 2% per year (factored base year value). This mechanism is how Prop 13 protects long-term owners.

Why it matters for LA multifamily

LA multifamily base year values tell the story of the building's ownership history. Long-held buildings have old base years with compounded 2%-cap growth — far below current market value. Recently-acquired buildings have current-market base years and correspondingly higher property taxes.

Related terms


From the Sterman LA Multifamily Glossary — defined the way a broker with $1.41 billion across 254 closed transactions actually uses these terms.

Michael Sterman, Senior Managing Director Investments, Marcus & Millichap.

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