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
- We take the typical value Zillow reports for your type of home and ZIP code, in your purchase month and in the newest month available.
- Your price is multiplied by the change, and condition sets how far the range reaches.
- For the original loan, the balance comes from steady fixed-rate monthly payments counted from the month after you bought.
- Midpoint minus balance gives equity; selling costs come off as well for a net before tax.
- The Prop 13 estimate applies each year's State Board of Equalization inflation factor to your price; none is above 2%.
Your Prop 13 value and Prop 19
Prop 13 keeps your taxable value close to your purchase price, raising it 2% a year at most, so owners who bought years ago often pay tax on much less than today's value.
Owners 55 or older who sell and buy again within California may be able to transfer that taxable value under Proposition 19. The replacement must be purchased within two years, the benefit can be used three times, and the assessor decides.
When retirement or a smaller home comes up, check 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
Can I use this to plan around orders?
Yes, as a first look at the value and equity you may have. For timing and steps, Rudy can map them out with you, and for a closer value he can review recent sales near your home, free.
Why might my home sell outside this range?
The range is built from a ZIP-wide index and a condition rule of thumb. Your lot, view and updates can move a real price beyond it, which comparable sales show.
My VA loan included the funding fee. What should I enter?
The starting loan here is just your price minus the down payment. If you financed the funding fee or refinanced, pick the second loan option and enter your balance from your statement.
Is the tax value my home's value?
No. That figure only sets your tax; it grows from your purchase price by no more than 2% annually. Your county bill shows the official amount.
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