California Prop 19 & Property Tax Guide
California property taxes are governed by a unique system that most people do not fully understand until they are buying, selling, or inheriting a home. Proposition 13 (1978) and Proposition 19 (2021) are the two laws that shape how much you pay — and how much you can save.
How California Property Tax Works
Proposition 13 — The Foundation
Prop 13 limits property taxes in three key ways:
- Tax rate capped at 1% of assessed value (plus voter-approved bonds)
- Assessed value set at purchase price — not market value
- Annual increases limited to 2% — regardless of actual appreciation
Why this matters:
A home purchased in 2000 for $300,000 might be worth $900,000 today, but the owner's tax basis is only ~$400,000 (after 2% annual increases). Their tax bill: ~$4,000/year. A new buyer at $900,000 would pay ~$9,000/year.
This creates a powerful incentive to hold property — and a significant tax increase when you sell and buy again.
Proposition 19 — What Changed
Prop 19 took effect in April 2021 and made two major changes:
Change 1: Portability for Homeowners 55+, Disabled, or Disaster Victims
Before Prop 19: You could only transfer your tax basis within the same county (Prop 60) or between certain participating counties (Prop 90).
After Prop 19:
- Transfer your tax basis anywhere in California
- Use the benefit up to 3 times (previously once)
- No county participation agreements needed
- Works for homeowners age 55+, severely disabled, or victims of wildfire or natural disaster
Rules:
- Must buy a replacement home within 2 years of selling
- If the new home costs more than the old home, the difference is added to your transferred assessed value
- If the new home costs equal or less, your assessed value transfers straight over
Example:
- Sell Central Coast home (assessed at $250,000, market value $800,000)
- Buy new home in another county for $750,000
- New assessed value: $250,000 (transferred basis)
- Annual tax savings: ~$5,000 vs. buying at full market value
Change 2: Inherited Property (Parent-Child Transfer)
This is the biggest impact of Prop 19 — and the one that catches families off guard.
Before Prop 19 (Prop 58):
- Children could inherit a parent's primary residence AND one additional property
- The parent's low assessed value transferred — no reassessment
- No requirement to live in the home
- Could inherit, rent it out, and keep the low tax basis indefinitely
After Prop 19:
- Children can only inherit the parent's primary residence (not additional properties)
- The child must use the home as their own primary residence
- Must file for the homeowner's exemption within 1 year of the transfer
- If the home's market value exceeds the assessed value by more than $1 million, the excess is partially reassessed
The $1 Million Buffer:
- Parent's assessed value: $200,000
- Market value at death: $900,000
- Difference: $700,000 (under $1M buffer)
- Child's new assessed value: $200,000 (fully transferred)
But:
- Parent's assessed value: $200,000
- Market value at death: $1,500,000
- Difference: $1,300,000 (exceeds $1M buffer by $300,000)
- Child's new assessed value: $500,000 ($200K base + $300K excess)
What This Means for Investment Properties
Inherited investment properties (rentals, vacation homes) are now fully reassessed at market value. There is no exclusion, no buffer.
Example:
- Parent owned a rental home — assessed at $150,000
- Market value at inheritance: $700,000
- New assessed value: $700,000
- Annual tax increase: ~$5,500
Property Tax When Buying a Home
What New Buyers Need to Know
When you purchase a home, the assessed value resets to your purchase price. Your annual property taxes will be approximately:
- Base rate: 1% of purchase price
- Bonds and assessments: 0.1-0.5% (varies by area)
- Total effective rate: 1.1-1.5%
Supplemental Tax Bills
In the year you buy, you receive supplemental tax bills — prorated charges for the difference between the old owner's assessed value and your purchase price.
- You may receive 1-2 supplemental bills
- They are one-time charges, not recurring
- They can be significant — $2,000-10,000+ depending on the price gap
- Budget for these in your first year of ownership
Mello-Roos (Community Facilities Districts)
Some newer developments in California charge Mello-Roos taxes for infrastructure:
- Roads, schools, parks, and utilities
- Can add $2,000-8,000/year to your tax bill
- Runs for 20-40 years, then expires
- Always ask about Mello-Roos before buying in a newer subdivision
Property Tax When Selling a Home
Capital Gains Considerations
When you sell, property taxes are only part of the picture:
- Federal capital gains exclusion: $250,000 (single) / $500,000 (married)
- Must have lived in the home 2 of last 5 years
- California taxes capital gains as ordinary income (up to 13.3%)
Prop 19 Portability (for Qualifying Homeowners)
If you are 55+ and selling your primary residence:
- Sell your current home
- Buy a replacement home anywhere in California within 2 years
- Transfer your low assessed value to the new property
- Save thousands annually in property taxes
This is one of the most underused benefits in California real estate.
Tax Planning Strategies
For Buyers:
- Check the tax bill before making an offer — some areas have significantly higher bond assessments
- Budget for supplemental taxes in your first year
- Ask about Mello-Roos in newer developments
- Consider areas with lower bond assessments for long-term savings
For Sellers 55+:
- Use Prop 19 portability to downsize without a tax increase
- Time your sale and purchase within the 2-year window
- Consult a CPA to coordinate capital gains exclusion with portability
For Families with Inherited Property:
- File the homeowner's exemption within 1 year if you plan to live in the inherited home
- Consider the tax impact before deciding to keep vs. sell inherited property
- Investment properties will be reassessed — factor the tax increase into your rental analysis
- Consult an estate planning attorney before a parent passes to explore trusts and transfer strategies
Common Questions
Can I fight my property tax assessment?
Yes. You can file an assessment appeal with your county assessor's office if you believe your assessed value is too high. Grounds include:
- Comparable sales support a lower value
- The property has damage or defects not reflected in the assessment
- Market conditions have declined since the assessment date
Do property taxes go down if home values drop?
Temporarily, yes. Prop 8 allows temporary reductions when market value falls below assessed value. However, the assessed value can increase back up (by up to 2%/year) once the market recovers.
How does a remodel affect my property taxes?
Permits trigger a reassessment of the new construction only — not the entire property. Adding a $50,000 addition adds ~$50,000 to your assessed value, not a full property reassessment.
Ready to Navigate California Property Taxes?
Property taxes are a significant ongoing cost — understanding them before you buy or sell can save you thousands per year.
Next Steps:
- Contact me to discuss how property taxes factor into your purchase decision
- Use our mortgage calculator — it includes estimated property taxes
- Check your county assessor's website for current tax rates and bond assessments
Pro Tip: When comparing homes, always compare the total tax bill — not just the listing price. Two homes with the same price can have property tax bills that differ by $3,000-5,000/year due to Mello-Roos and bond differences.