10 Mortgage Mistakes California First-Time Buyers Make (And How to Avoid Them)

I’m Michael DiVita — DRE #01372066 | NMLS #241655, DiVita Home Finance (DRE #01818285 | NMLS #323700), Tiburon, CA. I’ve been in California mortgage lending since 2000 and founded DiVita Home Finance in 2007. Call (800) 239-1103.

California’s housing market is competitive, expensive, and unforgiving. First-time buyers are already navigating sky-high prices, bidding wars, and complex loan programs — and many make avoidable mistakes that cost them their dream home, thousands of dollars, or months of delay. Here are the 10 most common mortgage mistakes California first-time buyers make, and exactly how to avoid them.

Mistake #1: Getting Pre-Qualified Instead of Pre-Approved

Pre-qualification is a quick estimate based on self-reported information. Pre-approval is a verified credit check with documented income and assets reviewed by an underwriter. In California’s competitive market, sellers and their agents know the difference — and many won’t accept offers without a full pre-approval letter. Get a full pre-approval with verified documents before you start seriously shopping. Better yet, pursue a fully underwritten pre-approval so your financing is essentially a done deal before you make an offer.

Mistake #2: Making Large Purchases Before Closing

Buying a car, furniture, or opening new credit cards between pre-approval and closing is one of the most common ways to lose a loan at the last minute. Lenders re-verify your credit and debt obligations before funding — new debt can push your DTI over the qualifying threshold or drop your credit score enough to trigger a rate change. Make zero major purchases or credit applications from the moment you apply until the day after you close.

Mistake #3: Not Accounting for Closing Costs

California closing costs typically run 2–3% of the purchase price. On a $900,000 home, that’s $18,000–$27,000 in addition to your down payment. Many first-time buyers save the exact down payment amount and are blindsided by the closing cost bill. Budget closing costs separately. Ask your loan officer for a Loan Estimate early in the process so you know exactly what to expect. Also ask whether seller concessions toward closing costs are possible — they’re rare in hot markets but more common in slower ones.

Mistake #4: Only Getting One Rate Quote

Research from the CFPB shows that getting just one additional mortgage quote saves the average borrower $1,500 over the life of a loan. Getting five quotes saves $3,000+. In California, where loan amounts are high, even a 0.25% rate difference on a $700,000 loan is worth $35,000+ over 30 years. Compare at least 2–3 lenders, or work with a broker who accesses multiple lenders on your behalf. Multiple mortgage inquiries within a 45-day window count as a single inquiry for scoring purposes — so shopping aggressively won’t hurt your credit.

Mistake #5: Ignoring First-Time Buyer Programs

California has some of the most robust first-time buyer assistance programs in the country, yet many buyers don’t know they exist. Programs like CalHFA MyHome, the CalHFA Dream For All shared appreciation program, and local county assistance programs can provide tens of thousands of dollars in down payment help. Ask your loan officer specifically about CalHFA programs and local assistance in your target county before assuming you need to come up with the full down payment yourself.

Mistake #6: Focusing Only on the Monthly Payment

A monthly payment alone doesn’t tell you what you’re actually paying for. A lower payment with a higher rate, longer term, or larger loan could cost dramatically more over time. Ask your lender to show you the total interest paid over the life of each loan option, not just the monthly payment. Understand the difference between buying points to lower your rate vs. a no-point loan, and run the break-even math for your expected time in the home.

Mistake #7: Moving Money Around Before Applying

Lenders need to “source and season” your down payment funds. Large deposits without explanation create underwriting problems — lenders need to verify that your down payment didn’t come from a loan, seller, or undisclosed source. Moving money between accounts, withdrawing and redepositing cash, or receiving large transfers right before applying all trigger documentation requirements. Keep your down payment in one account for at least 60 days before applying. If you receive gift funds, follow the formal gift documentation process.

Mistake #8: Skipping the Rate Lock Conversation

Interest rates fluctuate daily. A rate lock guarantees your rate for a specific period (typically 30–60 days) regardless of market movement. Many first-time buyers don’t understand rate locks and either lock too early (extending adds cost) or fail to lock at all — then see their rate jump before closing. Have an explicit conversation with your loan officer about when to lock, for how long, and what happens if closing is delayed. Understand float-down options.

Mistake #9: Not Understanding the Full Housing Payment

Your mortgage payment is principal and interest — but your total housing cost includes property taxes, homeowners insurance, private mortgage insurance if applicable, and HOA fees. In California, property taxes run 1–1.25% of assessed value annually. HOA fees in condo-heavy markets like San Francisco and LA can run $500–$1,500/month or more. Ask your lender for PITI quotes (principal, interest, taxes, insurance) plus any HOA — this is the real number that should go into your budget.

Mistake #10: Waiting for the “Perfect” Market

The most expensive mistake many California buyers make isn’t a paperwork error — it’s waiting. Buyers who waited for prices to drop in 2019 watched prices rise 30%+ through 2021. Buyers who waited for rates to fall in 2023 watched home prices appreciate while rates stayed elevated. In California, time in the market typically beats timing the market. Buy when you’re financially ready and find the right home at a price that fits your budget — not based on where you think the market is going.

Bonus: The Mistake of Going Directly to Your Bank

Your bank offers one set of products, one underwriting guideline, and one rate sheet. A mortgage broker accesses dozens of lenders — and can find the program that fits your specific situation, credit profile, and property type better than any single institution can. This matters especially in California, where jumbo loans, non-warrantable condos, high DTIs, and self-employment income require access to specialty lenders that retail banks often don’t carry.