California property-tax decision guide
Should You Use Proposition 19?
For qualifying California homeowners, Proposition 19 may allow a lower property-tax base to move to a replacement primary residence. The opportunity can be meaningful—but eligibility, timing, value, and filing details need to be checked before the move is structured around it.
Decision snapshot
Who may qualify
Homeowners age 55 or older, people with qualifying severe disabilities, and certain victims of wildfire or natural disaster.
What may transfer
The factored base-year value of an eligible California principal residence—not simply its current tax bill.
Where you may move
Under Proposition 19, an eligible replacement principal residence may be anywhere in California.
Key timing rule
The replacement home generally must be purchased or newly constructed within two years of selling the original home.
Rules differ by eligibility category and facts. This guide summarizes the California State Board of Equalization’s public guidance; it is not tax or legal advice.
How the transfer works
Think in terms of a transferred taxable value—not a frozen tax bill.
Equal or lesser value
If the replacement meets the applicable “equal or lesser value” test, the original home’s factored base-year value may transfer without a value adjustment.
Higher-value replacement
You may still qualify, but the amount above the applicable value threshold is generally added to the transferred taxable value.
Up to three transfers
Qualified homeowners age 55 or older or severely disabled may use the base-year transfer up to three times.
Eligibility checklist
Confirm these items before relying on the benefit.
1. Eligible owner
Confirm the qualifying category and documentation with the county assessor or your tax adviser.
2. Principal residences
Both the original and replacement properties must satisfy the applicable principal-residence requirements.
3. California location
The original and replacement homes must meet California’s location rules for the transfer.
4. Two-year window
Map both closing dates carefully. Buying before selling can qualify if the original home is sold within the allowed period.
5. Value calculation
Ask the assessor or adviser to model the transferred value, especially when buying a more expensive home.
6. Claim filing
The transfer is not completed automatically through escrow. File the required claim with the assessor where the replacement home is located.
Timing and value
The “equal or lesser value” threshold changes with timing.
| Replacement timing | General BOE threshold |
|---|---|
| Purchased or completed before the original home is sold | Up to 100% of the original home’s full cash value |
| Within the first year after sale | Up to 105% |
| Within the second year after sale | Up to 110% |
These percentages are a general summary. The assessor determines values and eligibility. A higher-priced replacement may still qualify, with an adjustment.
Planning questions
Proposition 19 should support the move—not dictate it.
Does the tax benefit change affordability?
Compare the modeled transfer with taxes at the replacement home’s full market value.
Should you buy or sell first?
Buying first may create an interim period taxed at full market value; the BOE notes that this period is not refunded.
Who must confirm the numbers?
Coordinate the county assessor, CPA or tax adviser, lender, and real estate plan before finalizing timing.
Official verification matters
Use the California Board of Equalization’s current Proposition 19 guidance and the assessor for the county where the replacement home is located.
Frequently asked questions
Common Proposition 19 questions
Can I buy the replacement home before selling?
Potentially, yes. The BOE states that the original home generally must be sold within two years of the replacement purchase, with all other requirements met.
Can the replacement home cost more?
Yes, but the excess over the applicable threshold is generally added to the transferred taxable value.
Is the claim handled in escrow?
No. The BOE directs owners to file the claim after the transactions are complete with the assessor in the replacement home’s county.
Is this the same as the parent-child exclusion?
No. Proposition 19 also changed intergenerational transfer rules, but those are separate from the base-year transfer used when an eligible owner moves.
Last reviewed August 2026. Laws, forms, assessed values, and official interpretations can change. Confirm your situation with the county assessor and qualified tax or legal professionals.