The California housing market is notoriously expensive, meaning buyers often need specialized "Jumbo" mortgages to secure a home. However, California also offers some of the most powerful property tax protections in the entire world. Our California Mortgage Calculator accounts for both of these unique market realities.
In many states, if the value of your home doubles over ten years, your property taxes will also double. This forces many retirees out of their homes. California's Proposition 13 permanently prevents this from happening.
Why you must manually enter your target purchase price: Because of Prop 13, the previous owner's tax bill is irrelevant to you. If they bought the house in 1990 for $200,000, they might be paying $2,500 a year in taxes. If you buy it from them today for $1,000,000, the home will instantly trigger a "reassessment" at the new purchase price, and your tax bill will be roughly $10,000+ a year.
Because home prices in coastal California (Los Angeles, San Francisco, San Diego) are so incredibly high, most buyers blow right past the standard federal loan limits.
A "Mello-Roos" is a special tax assessment district common in newer California housing developments (built after 1982). If you buy a newer home, you might have to pay a Mello-Roos fee on top of your normal 1% property tax. This repays bonds used to build local infrastructure like schools and roads. Always ask your realtor if the home is in a Mello-Roos district before making an offer.
Standard California homeowners insurance does not cover earthquake damage. You must buy a separate policy (often through the California Earthquake Authority). The premiums vary wildly based on proximity to fault lines and the age/construction of the home, but expect it to add $50 to $200+ to your monthly housing costs if you choose to buy it.
Quick answer: A California mortgage estimate should combine principal and interest with property taxes, homeowners insurance, mortgage insurance, HOA dues and transaction-specific costs. Proposition 13 affects assessed-value rules, but it does not make every owner’s tax bill identical.
Supplemental assessments, voter-approved debt and local charges can affect the bill. Verify the parcel and county information before relying on an estimate.
Home insurance availability and price vary by property and location. Use a property-specific quote, not a statewide average.
Conforming and high-cost limits can vary by county and year. Compare conventional mortgages and jumbo mortgage loans using current lender terms.
Next: estimate closing costs, estimate affordability, review mortgage-rate context.
Model a California mortgage using your own tax and insurance assumptions.
$417/month
$117/month