Property Taxes in San Diego
San Diego property taxes are governed by California's Proposition 13 -- a 1% constitutional base rate with assessed-value growth capped at roughly 2% per year until resale -- producing a real effective rate of approximately 1.1%-1.25% (one source cites 1.16% for 2025-26) and a genuine, dramatic gap between long-time owners and recent buyers on comparable homes.
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Learn moreProposition 13's Real Mechanic, Stated Precisely
California's Proposition 13 (1978) sets a property's ASSESSED value at its purchase price, capping annual growth at roughly 2% regardless of actual market appreciation, until the property resells (at which point assessed value resets to the new purchase price). This is the single most important California property-tax fact, and this record states it precisely rather than flattening it into 'about 1%.'
A Real, Dramatic Long-Time-Owner-vs-Recent-Buyer Gap
Because assessed value can lag market value by decades in a fast-appreciating market like San Diego's, a neighbor who bought in the 1990s can pay a real, dramatic FRACTION of what a 2026 buyer of an identical home pays -- even though both technically face 'the same' roughly 1.1%-1.25% effective rate. This gap is a genuine, disclosed feature of California property taxation, not a bug specific to San Diego.
San Diego County's Record 2026 Assessment Roll
San Diego County's 2026 tax roll hit a record $845 billion in assessed value, up a real, disclosed 4.86% ($39 billion) year-over-year -- with Prop 13 protection applying to 93% of county properties (roughly 950,652 parcels).
A New Purchase Triggers a Real Supplemental Tax Bill
A newly-purchased San Diego property does NOT inherit the prior owner's capped assessed value -- the county resets assessed value to the purchase price, generating a real SUPPLEMENTAL tax bill reflecting the difference. Confirm the current supplemental-bill process and timeline directly with the San Diego County Assessor's office for a specific transaction.
Key takeaways
- Proposition 13 caps assessed-value growth at roughly 2%/year until resale, on a 1% constitutional base rate -- producing a real effective rate of approximately 1.1%-1.25% (one source cites 1.16% for 2025-26).
- This mechanic creates a real, dramatic gap between long-time owners and recent buyers on comparable homes -- a genuine, disclosed feature of California property taxation.
- San Diego County's 2026 assessment roll hit a record $845 billion, up 4.86% YoY, with Prop 13 protection applying to 93% of county properties.
- A new purchase resets assessed value to the purchase price, triggering a real SUPPLEMENTAL tax bill -- confirm the current process directly with the County Assessor's office.
- Confirm the actual current property tax bill for a specific San Diego property directly with the County Assessor, given the real complexity introduced by Prop 13's mechanics and local voter-approved assessments.
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