How to Get Preapproved for a Mortgage in San Diego: What Lenders Check and What the Letter Means

Mortgage preapproval in San Diego starts when a lender reviews your income, debts, savings and credit and gives you a written letter that says how much they are willing to lend you, up to a certain amount and based on certain assumptions. The letter is not a final loan approval, but it tells you what price range to shop in and shows a seller that a lender has looked at your finances.

Prequalification and preapproval: what is the difference?

People use these two words as if they mean the same thing, and the federal Consumer Financial Protection Bureau says that is close to how lenders use them. Both kinds of letters say how much a lender is willing to lend you, up to a limit and based on certain assumptions. Some lenders call a letter based on information you report yourself a prequalification, and they save the word preapproval for a letter based on information they have verified. Other lenders use the words the opposite way.

The CFPB's advice is not to worry about the label. The process behind the letter matters more than the name. When you talk to a lender, ask what documents they check, whether they pull your credit and whether the letter comes with a time limit.

Question to ask	Why it matters
Is the letter based on documents the lender verified?	A verified letter is a stronger sign that you can finance the purchase.
Will you pull my credit?	Lenders may check your credit when they issue either type of letter.
How long is the letter good for?	Some lenders give a commitment letter that is valid for a set period.
What assumptions is the amount based on?	Rate, down payment and loan type all change the number.

What a lender looks at

A lender wants to know that you can repay the loan. That usually comes down to four things: how much you earn and how steady that income is, how much debt you already carry, how much cash you have for the down payment and closing costs, and what your credit history looks like.

• Income: pay stubs, tax returns or other proof of what you earn, plus how long you have been working.
• Debts: car loans, student loans, credit cards and any other monthly payments.
• Savings: statements that show where your down payment and closing money are coming from.
• Credit: your credit reports and scores, which show how you have handled borrowing in the past.

Every lender has its own checklist, and the list changes if you are self-employed or if someone is giving you money toward the purchase. Ask for the exact list on your first call so you can gather it all at once.

What the letter does and does not do

A preapproval letter is a starting point. It does not approve a specific home. After you pick a property and your offer is accepted, the lender still has to review the home, order an appraisal and finish the full loan review. If your finances change in the meantime, such as a new debt or a job change, the amount can change too, so ask your lender what to avoid before closing.

The amount on the letter is also not a target. It is the most a lender is willing to lend under certain assumptions, and your comfortable monthly payment may be lower. I walk through how that works in my guide on how much income you need to buy in San Diego.

When to get preapproved

The CFPB notes that many people wait for a preapproval letter until they are ready to shop seriously. I agree with that timing for most buyers. If you are a year or more away, a prequalification conversation can help you plan your savings. Once you are within a few months of touring homes, get the full letter, so you know your range before you fall for a house outside it.

Preapproval is also the first of the steps in the larger plan I outline in what the home buying process looks like from start to finish.

What if a lender says no?

Hearing no is frustrating, but it is useful information. The CFPB says that if a lender evaluates your creditworthiness and tells you that you do not qualify for a prequalification or preapproval letter, it must give you an adverse action notice. That notice explains the reasons, and it is your roadmap for what to fix.

• Read the notice and ask the lender to walk you through each reason.
• Review your credit reports for mistakes and dispute anything that is wrong.
• Pay down balances or build savings if the notice points to debt or cash.
• Talk to a second lender, because lenders can have different programs and rules.

What this guide cannot promise

A letter from one lender does not guarantee that another lender will lend you the same amount, and it does not guarantee a rate. Lenders set their own rules, programs change and your own finances can move. Treat the number as an estimate, and ask your lender to put any key assumptions in writing.

My advice for San Diego buyers

1. Ask each lender what the letter is based on and whether it is verified.
2. Gather your income, debt and savings documents before the first call.
3. Get your letter before you start touring homes seriously.
4. Compare at least two lenders, using the same questions for each.
5. Pick a monthly payment you are comfortable with, not just the top number on the letter.

A note on advice

I am a REALTOR®, not a lender, attorney, tax professional or financial advisor, so this guide is general information. Your lender can tell you what you qualify for, and a CPA or attorney can answer tax and legal questions.

Related guides

• Questions to Ask a Mortgage Lender Before You Choose One in San Diego
• Mortgage Rate Buydowns and Discount Points in San Diego: How They Work and When They Pay Off
• Jumbo Loans in San Diego: The 2026 Loan Limit and How a Jumbo Mortgage Works
• VA Loan Guide for San Diego Military Buyers: Funding Fee, Entitlement and Down Payment
• How Much Are Closing Costs When Buying a Home in San Diego?
• How Much Down Payment Do You Need to Buy a Home in San Diego?
• What Are the Steps to Buying a Home in San Diego?

Frequently asked questions

Is preapproval the same as prequalification?

Often the two are close, but lenders use the words differently. Some lenders base a prequalification on information you report and a preapproval on information they verify. Ask the lender what its process is.

Does getting preapproved hurt my credit?

Lenders may check your credit when they issue a letter. Ask your lender whether they will pull your credit, and how they handle it if you also talk to other lenders.

How long is a preapproval letter good for?

It depends on the lender. Some give a commitment letter that is valid for a set period. Ask for the dates in writing so you know when to refresh it.

Do I need a preapproval letter before I tour homes?

It is not a legal requirement to look at a home, but I recommend having one before you write an offer, and ideally before you start touring seriously.

What if I am preapproved for more than I want to spend?

You do not have to borrow the full amount. Choose a payment that fits your budget and tell your agent the price range you actually want.

About the author

Trevor Landress is a San Diego REALTOR® with Coldwell Banker West (DRE# 02126901). He was born and raised in San Diego and has been licensed since 2021.

Trevor helps homeowners sell, guides first-time buyers through the home buying process and assists investors with their next acquisition. His work includes negotiating offers, analyzing market trends, building pricing strategies and running marketing campaigns for his listings.

He serves clients across San Diego County, from coastal communities like La Jolla, Del Mar and Carlsbad to neighborhoods inland.

Trevor is part of the Campbell Group, a three-generation real estate team, and he and the Campbell Group consistently rank as a top producing team at Coldwell Banker West each month. He writes these guides to help San Diego buyers and sellers navigate an ever-changing market. To talk through your plans, call or text (619) 402-4614 or contact Trevor Landress.

How I help San Diego home buyers

I help buyers sort out their budget, understand their loan options with a lender, search for homes, write and negotiate offers, keep track of inspection and contingency deadlines and stay organized through closing.

How I help San Diego home sellers

I help sellers price their home, prepare it for the market, market it to buyers, review and negotiate offers and manage the steps from an accepted offer to closing.

Rules and official pages

• CFPB: mortgage questions and answers (Ask CFPB)