By Frederick Blum, Broker/Owner of Blum Realty Group
The place to start a San Diego home search is the monthly payment you can live with and the cash you want left after closing. A purchase price only means something once you tie it to a loan quote and the costs of a specific home.
When I help a buyer set a search range, I work through those pieces together. The lender’s approval tells us which loan you may be able to get; your household budget tells us which payment leaves room for the rest of your life.
1. Decide the most you want to pay each month
Start with your take-home pay and what you really spend. Include debt payments, childcare, getting around, food, medical costs and the saving you have committed to. Decide how much cushion you want for a change in income or a surprise expense.
Then compare that ceiling with what you pay for housing now. If the new home would cost more each month, work out where the difference will come from. The budget has to still work once the excitement of buying wears off.
The Consumer Financial Protection Bureau’s budgeting guide is a good worksheet to start with. Fill it in with your own spending and your estimates for the home.
2. Keep what the lender approves separate from what you want to spend
A debt-to-income ratio compares your monthly debt payments with your gross monthly income, before taxes and deductions. Different loan programs and lenders set different limits. The ratio says nothing about the everyday expenses that come out of your take-home pay.
Have the lender go through your real income, debts, credit and assets. Then set the loan scenarios they offer against the monthly ceiling you chose. You are allowed to search below what the lender is willing to approve.
Use the mortgage calculator to try out the numbers, then swap the estimates for a current lender quote. A calculator result is for planning; the lender still has to underwrite the loan.
3. Compare the whole monthly cost
| Budget line | What to include |
|---|---|
| Loan payment | Principal and interest using the quoted rate, term and loan amount. |
| Taxes and insurance | The property taxes you will pay as the new owner and the insurance for this home, including anything paid outside escrow. |
| Other property charges | Mortgage insurance if you will have it, HOA dues, special assessments and parcel charges. |
| Everything else about owning | Utilities, maintenance, repairs and the savings you plan to keep. |
Check what the lender’s quoted payment already includes, so you do not count taxes or insurance twice when they are collected with the payment. HOA dues and some other costs may be paid separately.
For San Diego property taxes, look at what the home will be assessed at once you own it and the tax-rate area it sits in. The County explains that the tax rate includes the base levy and voter-approved debt, and that a change of ownership can trigger supplemental bills. Check for Mello-Roos and other charges tied to the parcel too. The seller’s old tax bill may not tell you what you will pay.
Get insurance information for the specific home before you trust a monthly estimate. A house with no HOA and a condo with dues and an assessment can cost very different amounts a month at the same price. See our San Diego carrying cost guide and home insurance budget guide for the detailed checks.
4. Compare down payment options; 20% is not required
You do not need 20% down to buy a home. Eligible buyers can use a conventional loan at 97% loan-to-value, meaning 3% down, or an FHA loan with 3.5% down. Program rules, loan limits, underwriting and mortgage insurance still matter.
Ask the lender to compare the full monthly payment and the cash required for each option open to you. The smallest down payment can mean a different monthly payment; putting more down may shrink the loan but leaves you less cash after closing.
The program details are at Fannie Mae and in the CFPB’s FHA overview. If you are using a VA loan, also work through our separate VA affordability guide.
5. Keep cash to close and money left afterward separate
Your down payment is only part of the cash you need. Closing costs, prepaid items and the first deposit into your escrow account add to it, and any credits and the deposit you have already paid reduce what is due. Read the Loan Estimate for your loan instead of applying one closing-cost percentage to every purchase.
Then make a second line for the money you will have left after closing. The reserves a lender requires depend on the program and the underwriting. Your own repair fund, moving costs and emergency savings may need more than the lender’s minimum.
The CFPB’s Loan Estimate explainer shows where the estimated payment and the cash to close appear on the form. Keep the monthly budget and the cash-to-close figure side by side.
6. Run the home and the loan together before you settle on a range
For each home you are serious about, line up the price, the down payment, the loan terms, the total monthly housing cost, the cash to close and the savings you would have left. If the payment is too high, try a lower price, a different home or a different loan the lender will approve.
Assuming the seller’s loan is one option, but the old rate only applies to the balance you take over. The part of the price above that balance has to come from a source the lender accepts, and a second loan brings its own payment. Compare the whole package with a new loan. Our guide to second loans behind an assumable mortgage explains that gap.
Once the budget works, turn it into a search range. I can help you look at the home and the financing together, using the specific property and current terms. Start with help with your San Diego home search or home loan planning.
Frequently asked questions
How much house can I afford in San Diego?
Start with the most you want to pay for housing each month and the cash you can put in while keeping your savings. Then use real lender quotes, taxes, insurance and any HOA dues or assessments to turn that budget into a price range.
Do I need 20% down to buy a home?
No. There are lower down payment programs for eligible buyers, including conventional and FHA options. Which loan you can get, the underwriting, the mortgage insurance and the total payment depend on the program and your situation.
Does a lower purchase price always mean a lower monthly cost?
Not always. Look at the loan and the property costs together. Different rates, loan amounts, insurance, taxes, HOA dues or assessments can change the total monthly cost even when the prices are similar.
What money should I keep beyond my down payment?
Plan for the closing costs, prepaid items and any first deposit into your escrow account, less any credits and the deposit you have already paid. Then, separately, plan for the reserves the lender requires, moving costs, repairs and emergency savings after closing.