Over 55 and Thinking of Moving? How Prop 19 Can Let You Take Your Property Tax Base With You
The short answer: If you are 55 or older, severely and permanently disabled, or a wildfire or disaster victim, Proposition 19 may let you carry the taxable value of your current home to a replacement home anywhere in California. You can use it up to three times (age or disability), you must buy or build the new home within two years of selling the old one, and both homes must be your principal residence. If the new home is worth more than the old one, you do not lose the benefit. You pay tax on the difference.
I talk with homeowners every week who are ready to downsize, move closer to family, or simply want a different chapter, and who are frozen by one worry: "If I sell, my property taxes will jump." For many longtime owners, that fear is the whole reason they stay put. Prop 19 changes the math, so it deserves a close look before you decide.
How the Prop 19 transfer works
California taxes your home on its "base year value," which usually starts at your purchase price and rises by a limited amount each year under Prop 13. Buy a new home and, normally, it is reassessed at today's price. Prop 19 lets eligible owners move their old base year value to the new home instead, with an adjustment only if the new home is worth more.
Here are the rules in plain language, based on the California State Board of Equalization (BOE) Prop 19 guidance:
- Who qualifies: Homeowners age 55 or older, people who are severely and permanently disabled, and victims of a wildfire or governor-declared disaster.
- Where you can move: Anywhere in California. The replacement home does not need to be in the same county.
- How many times: Three transfers for age or disability claims. Disaster victims may transfer once per event, per the San Francisco Assessor's Prop 19 fact sheet.
- Timing: You must purchase or newly construct the replacement home within two years of selling the original. One of the two transactions must have happened on or after April 1, 2021.
- Principal residence: The original home must have qualified for the homeowners' (or disabled veterans') exemption, and the replacement must be your principal residence.
- Filing: You file a claim with the county assessor where the replacement home is located, after both transactions are complete and you live in the new home. The BOE says to file within three years of the replacement purchase or completion. The age-55 claim form is BOE-19-B.
The price test: equal or lesser value
This is the part most people want me to slow down on. The assessor compares the new home's market value to the old home's market value, using these benchmarks (BOE):
| When you buy the replacement | Compared against |
|---|---|
| Before you sell the old home | 100% of the old home's value |
| Within 1 year after the sale | 105% of the old home's value |
| In the 2nd year after the sale | 110% of the old home's value |
If the new home is at or under the benchmark, your old base year value moves over with no adjustment. If it is higher, the amount over the benchmark is added to your transferred value.
The BOE's own example: an original home with a $400,000 market value and a $100,000 base year value. The owner buys a $600,000 replacement in the first year after the sale. The benchmark is $420,000 (105%), the $180,000 above it is added, and the new taxable value is $280,000 (BOE example, for illustration only). Your own numbers will differ, and your county assessor makes the final determination.
Run your own numbers. Want a ballpark before you shop? The free Proposition 19 Primary Residence Transfer Calculator estimates your new property tax if you transfer your assessed value to a new home. It's an independent site, not a government agency, so treat the result as an estimate. Your county assessor sets the final number, and I'm happy to walk through it with you.
What this looks like in Sacramento County
The Sacramento Association of REALTORS' August 2026 report (published October 9, 2026) shows a Sacramento County median sold price of $550,000, flat compared with August 2025, with 1,013 closed sales, an average of 32 days on market, and 2.3 months of inventory. The association labels it a seller's market. Local figures change monthly, so check the latest report before you plan, and note that county medians do not describe any one neighborhood or home.
What that means for you, practically: if you have owned a long time, your home may be worth far more than your taxable value, and homes are selling quickly. A well-timed sale and a thought-out purchase window matter. Because the 105% and 110% benchmarks depend on timing, when you buy relative to when you sell can change your result.
The Racing Realtor take: plan the pit stop before you pull in
In racing, the pit stop is won or lost before you enter pit lane. Selling a home to use Prop 19 works the same way. Before you list, I want you to know your likely benchmark, your two-year window, and what you hope to buy. A sale you rush into can cost you more than a sale you plan. That planning, not a rush to the finish line, is where I can help most.
A simple checklist before you list
- Confirm you qualify (age 55 or older, disability, or disaster) and that your current home is your principal residence.
- Ask your county assessor for your home's current base year value so you know what you would be transferring.
- Get a market opinion of value on your current home, since the price test compares market values.
- Map your two-year window and decide whether you will buy before or after you sell.
- Talk with a tax professional or your county assessor about your specific situation.
- After you move in and both transactions close, file the claim with the assessor in the county of your new home, within three years of purchase or completion.
If you inherited a home instead, that is a different Prop 19 rule. I covered it here: Inherited a home in Placer or Sacramento County? How Prop 19 shapes your keep, rent or sell decision.
Frequently asked questions
Do I have to be 55 to use the Prop 19 transfer?
No. You qualify if you are 55 or older, severely and permanently disabled, or a victim of a wildfire or governor-declared natural disaster. Meeting one of those is enough. Each uses its own claim form with the county assessor.
Can I move to a different county and keep my tax base?
Yes. Under Prop 19 the replacement home can be anywhere in California. This is a big change from the older rules, which limited moves to certain counties.
Can I buy a more expensive home?
Yes. You do not lose the benefit. The portion of the new home's value above the benchmark (100%, 105% or 110% of the old home's value, depending on timing) is added to your transferred taxable value.
How many times can I do this?
Three times for age or disability claims. Disaster victims may transfer once per event. Because the count is limited, it is worth planning each move with care.
How long do I have between selling and buying?
The replacement home must be purchased or newly constructed within two years of the sale of the original. After both transactions are complete, you file a claim with the county assessor where the new home is located, within three years of the purchase or completion date.
Does it apply to a second home or rental?
No. Both homes must be your principal residence, and the original must have qualified for the homeowners' or disabled veterans' exemption. Rules around duplexes, trusts and co-owners can be technical, so ask your county assessor.
Important note
This article is general information, not legal, tax or financial advice. Prop 19 rules are detailed and can change, and the county assessor makes the final determination on any claim. Please confirm your situation with your county assessor, the California State Board of Equalization, and a qualified tax professional or attorney before making decisions. Market data reflects the Sacramento Association of REALTORS' August 2026 report and may be dated by the time you read this.
Thinking about your next move?
If you are 55 or older and wondering what a sale would mean for you, I am happy to walk through the timing and the market with you, with no pressure. Call or message me and we will plan it step by step.
Shauna Hogg
The Racing Realtor | GUIDE Real Estate
DRE# 01475758
916-521-4600
Shauna@drivenhomesre.com
Sources
- California State Board of Equalization, Prop 19 base year value transfer (age 55+/disabled)
- San Francisco Assessor-Recorder, Prop 19 seniors fact sheet
- Sacramento Association of REALTORS, Housing Statistics, August 2026
- Proposition 19 Primary Residence Transfer Calculator, Proposition19.org (independent, not a government site)
