Buying · 8 min read
Assumable Mortgages in California: How to Take Over a Low Rate (2026)
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An assumable mortgage lets a buyer take over the seller’s existing loan — including its low rate. FHA, VA, and USDA loans are assumable with lender approval; conventional loans usually aren’t. The catch: you must pay the seller’s equity (the gap between the loan balance and the sale price) in cash or a second loan, and you still have to qualify.
Millions of American homeowners hold mortgages under 4%. If a seller has one of those loans and it’s a government-backed mortgage, a buyer may be able to assume it — keeping that below-market rate instead of taking a new loan in the mid-6% range. Here’s how assumptions actually work in California in 2026, and where they get tricky.
Which loans are assumable?
Three types are assumable: FHA, VA, and USDA loans. Conventional loans (Fannie Mae / Freddie Mac) generally contain a due-on-sale clause and are not assumable. So the first question on any listing is: what kind of loan does the seller have?
The buyer still has to qualify. The lender (the seller’s servicer) reviews your credit, income, and debt just like a new loan — assumption isn’t a way around underwriting, it’s a way to inherit the rate.
The equity gap is the real hurdle
Here’s the math that surprises buyers. Say a San Diego home sells for $850,000 and the seller’s assumable loan balance is $500,000. You assume the $500,000 at their low rate — but you owe the seller the other $350,000 in equity. That gap has to come from your cash, or from a second mortgage at today’s rates.
The lower the seller’s remaining balance, the bigger the cash gap. That’s why assumptions work best when the seller bought recently with little paydown, or when the buyer has substantial cash or can layer a second loan.
VA assumptions and entitlement
VA loans are assumable even by non-veterans, but there’s a wrinkle: the seller’s VA entitlement stays tied up in the loan until it’s paid off, unless the buyer is a veteran who substitutes their own entitlement. Sellers should understand this before agreeing — it can affect their ability to use a VA loan again. Our VA loan page explains entitlement.
How to make it happen
Assumptions run through the servicer and can take 45–90 days — longer than a normal close. Start by confirming the loan type, requesting the assumption package early, and getting pre-qualified so you know you can carry both the assumed loan and any second financing for the equity gap.
Because the gap financing and qualifying can get complex, it helps to have a broker model the blended cost — assumed loan plus second loan — against simply taking a new loan today. Sometimes the blended rate still beats the market; sometimes it doesn’t.
Frequently asked questions
Are conventional loans assumable in California?
Usually not. Conventional loans typically include a due-on-sale clause, so only FHA, VA, and USDA loans are commonly assumable. Always confirm the seller’s exact loan type first.
Do I still have to qualify to assume a mortgage?
Yes. The servicer underwrites your credit, income, and debt-to-income just like a new loan. Assuming a mortgage inherits the rate, not the approval.
How do I pay the difference between the loan balance and the price?
That equity gap is paid in cash or with a second mortgage at current rates. The bigger the seller’s equity, the more cash or secondary financing you’ll need.
How long does a mortgage assumption take?
Often 45–90 days — typically longer than a standard purchase — because the servicer must approve the assumption. Start the paperwork early.
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