Discover how LA county property taxes work so you can plan for your tax bill. Get up-to-speed on how Proposition 13 and Proposition 18 will affect your assessment, deadlines, how to calculate your tax payment, and how to appeal your assessment if needed with this guide written by a local tax expert. Find a TurboTax Store by you: turbotax.intuit.com/local-tax-offices FAQ: What two primary factors determine an annual property tax bill in LA County, and how are they used to calculate it? An annual property tax bill is based on your home's assessed value (determined by the LA County Assessor's Office) and your combined property tax rate (California's 1% base rate plus local levies for schools and infrastructure). The bill is calculated by multiplying the home's assessed value by the combined property tax rate. How does Proposition 13 limit property tax increases for California homeowners? Answer: Passed in 1978, Proposition 13 caps the base property tax rate at 1% and limits...