San Diego housing outlook as mortgage rates dip below 6%: affordability improves, competition may intensify

Mortgage rates move below a key threshold

U.S. 30-year mortgage rates have fallen below 6%, reaching their lowest level since September 2022, a shift that can materially change monthly payments for buyers and influence the timing decisions of both homeowners and would-be sellers. In San Diego County—where prices remain high relative to incomes—even a modest rate decline can reshape what households can qualify for, while not necessarily resolving broader affordability constraints.

How lower rates translate into monthly payments

Local real estate professionals say the most immediate effect is improved buying power. One example provided by a Mission Valley-based broker quantified the impact on a $1 million purchase: a move from the low-6% range into the high-5% range can reduce principal-and-interest payments by roughly $550 to $600 per month, depending on down payment and loan terms. That type of change can expand the pool of qualified borrowers and help buyers compete for a limited number of listings.

Supply remains central to what happens next

San Diego’s housing market dynamics are still shaped heavily by supply conditions. Federal Reserve data cited in the local report put active listings in San Diego County at nearly 4,000 as of January, underscoring that the number of homes available remains constrained relative to demand in many neighborhoods. A University of San Diego economist pointed to the “lock-in” effect as a major factor behind limited supply: homeowners with ultra-low mortgages have been reluctant to sell and replace those payments with higher-rate financing.

A drop below 6% may narrow that gap. As borrowing costs ease, some owners who have been sitting on mortgages near 3% may reconsider moving, potentially bringing additional inventory to market. However, because many sellers also become buyers, the net effect on supply can be muted if increased listings are matched by increased demand.

Market activity signals: sales have been lower year over year

Recent transaction data points to a slower start to the year. Local figures referenced from Redfin show 569 homes sold in San Diego in January, down from 637 in the same month a year earlier. Lower rates can support activity heading into spring, when seasonal buying typically strengthens, but the direction of prices will depend on whether new demand outpaces any increase in listings.

What to watch in the coming weeks

• Whether new listings rise as more homeowners test the market.
• How quickly pending sales respond as buyers recalculate affordability.
• Price changes and days-on-market as spring competition develops.
• Whether rate declines hold long enough to influence closing volumes beyond early spring.

Lower financing costs can improve affordability, but in tight-inventory markets they can also widen demand, potentially offsetting payment relief through higher purchase prices.

The rate drop below 6% is a notable shift for San Diego buyers and sellers alike. Its lasting impact will likely hinge on inventory: how many owners decide to list, how quickly buyers respond, and whether competitive pressure returns as the spring market approaches.