This is an estimate for planning, from Zillow's ZIP-wide typical values applied to your purchase price. It is not an appraisal, a broker price opinion, an offer, a loan offer, or tax or legal advice, and Rudy is a real estate agent, not a lender, appraiser or tax professional.
How the estimate works
- For your ZIP code and home type, Zillow's typical value is read at the month you bought and again at the latest month published.
- The same percentage change is applied to your purchase price, and the condition choice sets the range.
- If you still have the VA or other loan you bought with, its balance follows regular fixed-rate payments from the month after closing.
- Equity is what is left of the midpoint after the balance; the net also takes off selling costs, before taxes.
- For Prop 13, your price is raised each year by the State Board of Equalization's inflation factor, never more than 2%.
Your Prop 13 value and Prop 19
Your property tax is based on your Prop 13 taxable value, which began at your purchase price and can go up by no more than 2% each year, so it may be well under today's market value.
If you are 55 or older and buying again in California, Proposition 19 may let you bring that taxable value to the new home, provided you buy within two years of the sale. Each owner can use it three times, and the county assessor decides eligibility.
For a future move to a smaller place, there is the downsizing calculator.
Sources and dates
- Zillow Research, Zillow Home Value Index (ZHVI) by ZIP code: all homes, single-family and condo; middle tier, smoothed and seasonally adjusted (data through September 2026, files updated Oct 16, 2026)
- FHFA House Price Index for five-digit ZIP codes (annual, developmental index, not seasonally adjusted; 2000 = 100), used only for purchases before Zillow's series begin. Citation: Bogin, Doerner and Larson, Local House Price Dynamics: New Indices and Stylized Facts, FHFA Working Paper 16-01 (annual, through 2025)
- Freddie Mac Primary Mortgage Market Survey (PMMS): weekly 30-year and 15-year fixed averages; the page uses the mean for your purchase month (monthly means through October 2026; latest weekly 30-year average 7.24% on Oct 29, 2026)
- California State Board of Equalization, Letter To Assessors No. 2026/002: inflation factors for 1976-77 through 2026-27, with Revenue and Taxation Code section 51 and California Constitution article XIII A, section 2(b) (January 13, 2026)
- California State Board of Equalization, Proposition 19 (checked Oct 30, 2026)
- Assumptions, not sourced figures: the condition range (the same rule of thumb as the home value range tool), 6% selling costs, 20% down, regular payments on a fixed-rate loan starting the month after you bought, and the first inflation factor applying on the first January 1 after your purchase
Questions owners ask
How close is this to my home's real value?
The estimate adjusts your price by a ZIP-wide index and does not know your home's condition, lot or upgrades. For a value based on recent nearby sales, Rudy prepares one free.
I bought with a VA loan and no down payment. What do I enter?
Enter 0 for the down payment. The page figures the loan from your price and down payment only, so if you financed the VA funding fee, choose the second loan option and type your balance from your statement.
What if I refinanced, for example with an IRRRL?
Select the refinance choice and type the balance from your newest statement, adding any second loan. The page uses it as given.
Is my Prop 13 value what my home would sell for?
No. It is a tax base, set at your purchase price and raised by no more than 2% each year. Market value is usually higher, and your tax bill shows the exact taxable value.
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