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 find Zillow's typical value for your home type and ZIP code in the month you closed, and again in the newest month of data.
- The ratio between those two values is applied to what you paid, and your condition choice widens or shifts the range.
- If you still have the original loan, the balance is figured from its regular fixed-rate payments, beginning the month after you bought.
- Subtracting the loan from the middle value gives equity; subtracting selling costs as well gives a pre-tax net.
- For Prop 13, your price is grown by the yearly inflation factors the State Board of Equalization sets, never more than 2%.
Your Prop 13 value and Prop 19
A Prop 13 taxable value begins at the price you paid and climbs 2% a year at most, while market values in Rancho Del Rey have often moved faster. The results show that difference as the amount today's estimate sits above your taxable value.
Owners who are 55 or older may be able to use Proposition 19 to bring their taxable value along to a new home elsewhere in the state; the purchase has to happen within two years of selling, and the benefit has a three-use limit. Eligibility is the assessor's call.
Two pages that pair well with this one: the downsizing calculator and how to read your Chula Vista property tax bill.
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
Will this match what a buyer pays for my house?
Not exactly. It moves your price with a ZIP-wide index, and it has no way to see your lot, your updates or how your model compares with the one next door. Rudy can run free comparable sales for a closer figure.
Why is the estimate based on the whole ZIP code?
Zillow's ZIP data goes back to 2000 and updates monthly, so it tracks the change since you bought in a consistent way. What it misses is your specific house, which is exactly what recent nearby sales show.
What if I refinanced or took out a HELOC?
Pick "Refinanced, or I know my balance" and enter what you owe now on every loan secured by the home. The tool uses that figure as is instead of estimating payments.
Is my Prop 13 value the same as my home's value?
No, it only sets your property tax. It equals your purchase price grown by the yearly factor, capped at 2%, and is often far below market value. The number on your county tax bill is the official one.
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