The required down payment for purchasing a home in San Diego County, California depends on the mortgage program, lender requirements, and the buyer's financial qualifications. Many first-time homebuyers can qualify for low-down-payment loan programs, with down payments typically ranging from 3% to 5% for eligible FHA and conventional mortgages. Standard conventional home loans often require a down payment of 10% to 20%, although the exact amount varies based on the loan terms and borrower profile. Making a larger down payment can reduce your monthly mortgage payments, lower the total interest paid over the life of the loan, improve your chances of loan approval, and, in many cases, eliminate the need for private mortgage insurance (PMI). Buyers should also consider additional costs such as closing fees, property taxes, homeowners insurance, and maintenance expenses when budgeting for a home purchase.