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
- Zillow's 92118 typical value for homes like yours is pulled for the closing month and for the newest month in the data.
- Your price is scaled by that change, and the condition you pick puts a planning range around it.
- If you kept the purchase loan, its balance is projected from normal fixed-rate payments that start the month after closing.
- Midpoint minus balance is equity; less selling costs, it becomes an estimated net before taxes.
- The taxable value applies the State Board of Equalization's annual inflation factors, at most 2%, to your price.
Your Prop 13 value and Prop 19
Part of any Coronado plan is the tax picture. Your Prop 13 taxable value started at your purchase price and has risen 2% a year or less, and your next home is generally taxed from its own purchase price.
Owners 55 or older may be able to keep it instead: Proposition 19 allows the transfer to a replacement home in California when it is bought within two years after the sale, and it can be done three times. The assessor decides each case.
Part of the same playbook: the downsizing calculator and Prop 19 when inheriting or gifting a Coronado home.
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 this replace a comparative market analysis?
No, and it is not meant to. A ZIP index sees the island as a whole, not your lot, view or condition. A comparative market analysis from Rudy uses recent sales near you, and it is free.
Why measure change with a ZIP index?
It is published every month and goes back to 2000, so the change since your closing is measured the same way for everyone. Comparables then place your home within it.
How do I account for a refinance or equity line?
Choose the second loan option and enter your total balance today. That keeps the equity figure tied to what you actually owe.
Will selling reset my property tax?
Usually your next home is taxed from its own purchase price. Owners 55 or older may qualify to transfer their taxable value under Proposition 19; the county assessor decides.
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