Props 13 and 19: What California Buyers and Sellers Need to Know

If you’ve spent any time talking about California real estate, you’ve probably heard “Prop 13” come up. Maybe someone mentioned how their neighbor has lived in their home for 30 years and still pays surprisingly low property taxes. Or maybe you’ve wondered what happens to a parent’s tax base when they pass their home on to their kids. Understanding Propositions 13 and 19 may change how you think about buying, selling, or passing along a home in California.

Proposition 13: The foundation of California property taxes

Passed by California voters back in 1978, Proposition 13 did two big things. First, it capped property taxes at 1% of a home’s assessed value (plus any local voter-approved add-ons). Second, it limited how fast that assessed value can grow: no more than 2% per year, regardless of what’s happening in the real estate market. This is a pretty rare piece of legislation that you won't find in other states!

What does Prop 13 mean for us locally? If you bought a home in Pacific Grove ten years ago for $800,000, your assessed value today might be around $975,000 — even if the home is now worth $1.5 million on the open market. Your property tax bill reflects that lower assessed value ($975,000), not current market value.

Tax cap 1% of assessed value

Annual increase limit 2% max per year

Year enacted 1978

The key thing to understand is that property is reassessed to its current market value when it changes hands. So when you buy a home, your tax base resets to the purchase price — you don’t inherit the seller’s low assessed value. That’s why longtime homeowners often have significantly lower tax bills than recent buyers in the same neighborhood.

Buyer tip: When you’re budgeting for a purchase, always calculate your expected taxes based on the purchase price (approximately 1.12% on the Monterey Peninsula), not the seller’s current tax bill.

One related question that comes up often by homeowners: Does remodeling trigger a tax reassessment? The short answer is no, not on your existing home value — only the value of the new construction itself gets added to your current base year value, so it's not a reassessment of the whole property. So if you add a room, build an ADU, or do a major renovation, the impact on your tax bill is typically much more contained than people expect.

Proposition 19: The 2021 update that changed the rules

California voters passed Proposition 19 in November 2020, and it went into effect in 2021. It made two significant changes to how property taxes work: one that expanded benefits for certain homeowners, and one that tightened rules around inheriting property.

The good news: portability for seniors and others

Before Prop 19, if you are 55 or older and wanted to downsize or move, you could transfer your low property tax base to a new home — but only once, only within the same county, and only if the new home cost the same or less than your old one.

Prop 19 opened that up considerably. Now eligible homeowners, those who are 55 or older, severely disabled, or victims of a wildfire or natural disaster, can transfer their tax base to any replacement home anywhere in California, up to three times over their lifetime. And importantly, the replacement home can cost more than your original — there’s no longer a price limit. If it does cost more, your new assessed value is adjusted upward by the difference, but you still keep the bulk of your tax savings. Here’s how the formula works:

Under Prop 19: New assessed value = old assessed value + (replacement home price – sale price of original home)

Original home sale price	$1,200,000
Original home assessed value (Prop 13 base)	$300,000
Replacement home purchase price	$1,500,000
Difference (replacement − sale price)	$300,000
New assessed value ($300K + $300K)	$600,000

In this example, even though the homeowner bought a more expensive home, their assessed value is $600,000 — not $1.5 million. That’s a significant tax savings compared to a full reassessment at market value.

Why this matters on the Monterey Peninsula: Many longtime homeowners here are sitting on deeply appreciated properties with very low tax bases. Prop 19 gives them real flexibility to move — whether downsizing in Pacific Grove, upsizing to be closer to family, or relocating anywhere in California — without facing a dramatic property tax increase. For more detail on the formula and how your county assessor applies it, the CA Board of Equalization’s Prop 19 page is the most authoritative reference.

The tradeoff: Inherited property is now taxed differently

This is where Prop 19 gets a bit more complicated, and where a lot of families have been caught off guard.

Under the old rules (Prop 58), parents could transfer their home to their children, and the kids could keep the parent’s low tax base indefinitely — whether they lived in the home, rented it out, or used it as a vacation property. That generous benefit is gone.

Under Prop 19, if you inherit a parent’s home now, you can only keep their lower tax base if you move in and make it your primary residence within one year. And even then, there’s a limit: if the home’s market value exceeds the parent’s assessed value by more than $1,044,586 (current through February 2027), the portion above that threshold gets reassessed.

Exclusion amount (2025–2027) $1,044,586

Move-in deadline 1 year from transfer

Portability uses allowed Up to 3 times

If the child doesn’t move in, or if they miss the one-year deadline, the property gets fully reassessed to current market value. In a place like Carmel or Pacific Grove, where home values are high and Prop 13 bases are often very low, that can mean a dramatic jump in the annual tax bill.

Example: Say a parent’s home is assessed at $400,000 but is worth $1.8 million today. The child inherits it and moves in. The taxable value would be roughly $400,000 + ($1,800,000 − $400,000 − $1,044,586) = about $755,414 in assessed value — still much better than full market reassessment, but not the free pass it used to be.

Summary: What this means if you’re buying or selling

If you're a buyer (who doesn't qualify under Prop 19), your new home's property tax bill will be based on what you paid for the home, not what the seller has been paying. This is why many sellers are in no rush to leave homes they’ve owned for decades: their tax bills are very manageable, and moving means giving that up.

If you’re a seller who’s been in your home a long time and are 55 or older (or qualify as severely disabled or a disaster victim), Prop 19’s portability rules are worth exploring with your estate attorney and accountant before you list. The ability to carry your tax base to a replacement home, even a more expensive one, can make a move that once felt financially out of reach much more manageable.

And if you have a family home you’re thinking about passing down, this is an area where it’s really worth sitting down with an estate planning attorney before making any decisions. The rules around timing, occupancy, and exclusion amounts are specific enough that the details matter a lot.

Have questions about how these rules apply to your situation? I’m always happy to talk through the real estate side of the picture, and I have local professionals I can suggest for your legal and tax questions.

Thanks for reading! I know this was one a long one!

Ashley

Please note: This post is intended for general informational purposes only and does not constitute legal, tax, or financial advice. Property tax rules are complex, fact-specific, and ever-evolving. As a Realtor, I'm not a legal or tax expert. Please consult a qualified estate planning attorney, CPA, and/or your county assessor before making any decisions based on this information.

Sources

California State Board of Equalization - Proposition 19: boe.ca.gov/prop19

California State Board of Equalization - Proposition 13: boe.ca.gov/proptaxes/faqs/prop13.htm