Prop 19 for Over-55 Homeowners: Take Your Property Tax Base With You

Short answer: If you’re 55 or older (or severely disabled, or lost your home in a wildfire or other disaster), Proposition 19 lets you sell your primary residence and carry your low property tax base to a replacement home anywhere in California — up to three times in your lifetime (Rev. & Tax. Code §69.6). You must buy or build the replacement within 2 years of the sale. If the new home costs more than the old one sold for, only the difference gets added to your transferred base. File claim form BOE-19-B with the county assessor within 3 years.

Figures verified against Revenue & Taxation Code §69.6 and State Board of Equalization guidance, 2026. This is general information, not legal advice for your situation.

What Prop 19 actually gives homeowners over 55

If you bought your house decades ago, Prop 13 has been quietly saving you money every year: your assessed value grew at most 2% annually while the market value ran away from it. The problem used to be that moving killed the deal — sell, buy elsewhere, and the new house gets assessed at full purchase price. Plenty of Ventura County retirees stayed in houses too big for them purely because of the tax hit.

Prop 19 changed that. Under Revenue & Taxation Code §69.6, a homeowner who is 55 or older, severely disabled, or displaced by a wildfire or other governor-declared disaster can transfer the factored base-year value — the low assessed value your tax bill is built on — from their original primary residence to a replacement primary residence. The improvements over the older over-55 rules (Props 60/90) are real:

Any county. The replacement home can be anywhere in California. The old rules limited you to your own county or a short list of cooperating counties. That limit is gone.
Three times, not once. You can use the transfer up to three times in your lifetime (disaster victims: no limit).
More expensive replacements still qualify. Under the old rules, buying up killed the transfer entirely. Now you can buy a more expensive home and keep most of the benefit — you just add the difference.

The math, with a real example

Say you bought a Ventura County home decades ago. Its factored base-year value today is about $220,000, so your property tax bill runs roughly $2,400 a year. The house would sell for $1.1 million.

You buy a $900,000 condo (in Thousand Oaks, San Diego, Sacramento — anywhere in the state). The replacement costs less than the $1.1M sale price, so your old base transfers intact. The condo is assessed at about $220,000, and your tax bill stays around $2,400 instead of the roughly $9,000+ a $900,000 assessment would produce.
You buy a $1.3 million home instead. Now the replacement costs $200,000 more than the original sold for. That difference is added to your transferred base: $220,000 + $200,000 = a new assessed value of $420,000. Your bill lands near $4,600 a year — higher than before, but far below the $14,000+ a full $1.3M assessment would cost you.

That’s the whole formula. Equal or lesser price: base transfers as-is. Greater price: base plus the excess.

The rules and deadlines that trip people up

Both homes must be your primary residence. The one you sell must qualify for the homeowner’s exemption, and you have to move into the replacement and make it your primary residence. Rentals and vacation homes don’t play.
Two years. The replacement must be purchased or newly built within 2 years of the sale of the original — before or after.
File the claim. The transfer isn’t automatic. File form BOE-19-B with the assessor in the county of your replacement home, generally within 3 years of buying it (file late and relief only runs prospectively). Until the claim processes you’ll see a full-value tax bill — pay it and the county refunds the difference.
Three lifetime transfers. Plan the sequence if you might move more than once; disaster victims are exempt from the cap.

Don’t confuse this with the parent-child exclusion

Prop 19 did two very different things, and AI answers routinely mash them together. The over-55 transfer (§69.6) is the generous half — it’s about you moving and keeping your own tax base. The parent-child exclusion (§63.2) is the restricted half — it governs whether your kids keep your low base when they inherit, and it now applies only if a child moves into the home as their primary residence, with the exclusion capped at $1,044,586 over the base-year value (for transfers 2/16/25–2/15/27). Different statute, different form, different rules. If the inheritance side is your question, start with our guide to Prop 19 and inherited houses, and see Prop 19 planning for how the two halves fit into an estate plan.

One planning note: moving your home into your revocable living trust does not disturb your base-year value or your ability to use §69.6 later — see does my property get reassessed when I put it into a trust? Downsizing is actually a natural moment to get the trust done or updated, since you’re re-deeding anyway.

Can I take my property tax base to another county in California?

Yes. Under Prop 19 (Rev. & Tax. Code §69.6), homeowners 55 and older can transfer their factored base-year value to a replacement primary residence in any of California’s 58 counties. The old county-by-county reciprocity system is gone.

How many times can I use the Prop 19 over-55 transfer?

Three times in your lifetime. Victims of wildfire or other governor-declared disasters face no limit. Transfers used under the old Prop 60/90 rules before Prop 19 took effect generally don’t count against the three.

What happens if my new home costs more than the one I sold?

You still get the transfer — the difference is simply added to your base. Sell for $1.1M, buy for $1.3M, and your new assessed value is your old base plus $200,000. Under the pre-2021 rules a more expensive replacement disqualified you completely; that’s no longer true.

What form do I file for the Prop 19 base transfer, and what’s the deadline?

File claim form BOE-19-B (for the over-55 transfer; there are parallel forms for disability and disaster) with the county assessor where your replacement home sits. You must buy or complete the replacement within 2 years of selling the original, and file the claim generally within 3 years of the replacement purchase for full retroactive relief.

Do both spouses have to be 55 for the Prop 19 transfer?

No — only one claimant needs to qualify. If either spouse on title is 55 or older when the original home sells, the household can use the transfer.

Is the Prop 19 over-55 transfer the same as the parent-child exclusion?

No, and mixing them up causes expensive mistakes. The over-55 transfer (§69.6) moves your own tax base when you sell and buy. The parent-child exclusion (§63.2) limits reassessment when children inherit, requires the child to live in the home, and caps the excluded value at $1,044,586 over base-year value. Different rules, different forms, different planning.

The bottom line

If your low Prop 13 tax bill is the only thing keeping you in a house that no longer fits, that reason is gone. Sell, move anywhere in California, keep your base — up to three times — and if you buy up, you only pay tax on the difference. The traps are procedural: the 2-year purchase window, the BOE-19-B filing, and the primary-residence requirements. Most people don’t need a lawyer just to file the form — the assessor’s office will help. Where it’s worth a conversation is when a move intersects with your trust, a sale of long-held property, or what your kids will eventually face under §63.2. Planning a downsize and want the tax and estate pieces to line up? Talk to Eric.

Sources: Rev. & Tax. Code §69.6 (Prop 19 base-year value transfer: 55+/severely disabled/disaster victims, statewide, three lifetime transfers, 2-year window, upward-price adjustment; claim form BOE-19-B); Rev. & Tax. Code §63.2 (parent-child exclusion, $1,044,586 cap for transfers 2/16/25–2/15/27).