EL MONTE — California Housing Supply Tightens as homeowners with low mortgage rates remain reluctant to sell, limiting choices for prospective buyers. Verified statewide data shows inventory declined from a year earlier even as affordability continued to challenge households.
California had 3.1 months of unsold inventory in June, down from 3.8 months in June 2025, according to the California Association of Realtors. Active listings declined 10.4% from a year earlier, marking the fifth consecutive month of annual declines.
C.A.R. said housing supply would likely remain constrained through the rest of the summer.
That matters for buyers in El Monte, Baldwin Park, Rosemead and neighboring communities. A slower market does not necessarily mean substantially more homes are available.
California Housing Supply Tightens Amid Rate Lock-In
One factor restricting supply is what economists call the mortgage rate lock-in effect.
Freddie Mac has described the effect as homeowners retaining mortgages with favorable rates compared with current financing costs. Its research found that more than six in 10 mortgages had rates below 4% as of 2024.
Those homeowners can face a financial hurdle when considering a move.
A homeowner financing $500,000 for 30 years at 3.5% would pay about $2,245 monthly in principal and interest. Financing the same amount at 6.5% would increase that payment to about $3,160.
Taxes, insurance and other costs are not included in that comparison.
Freddie Mac found that homeowners with low-rate mortgages may have less incentive to list their properties because selling generally means surrendering those financing terms. The agency has identified the lock-in effect as one factor contributing to limited existing-home inventory.
Buyers Face Limited Choices
California Housing Supply Tightens at a time when mortgage rates remain well above the historically low levels available earlier this decade.
The average 30-year fixed mortgage rate was 6.58% on July 23, according to Freddie Mac’s mortgage rate data. Even small rate differences can significantly change monthly payments and purchasing power.
Meanwhile, California homes continued to move relatively quickly. The median single-family home took 23 days to sell in June, compared with 24 days a year earlier. C.A.R.’s statewide sales-price-to-list-price ratio was 100%.
Those figures suggest buyers should not assume weaker demand automatically creates broad negotiating leverage.
Lower Rates Could Change Supply
Lower mortgage rates could eventually reduce some of the financial penalty homeowners face when moving. A smaller difference between an existing mortgage and a new loan could make selling more attractive for some households.
It could also draw more buyers into the market.
For San Gabriel Valley families, that means changing rates could affect both sides of the housing equation. More homeowners might list properties, while improved affordability could increase competition.
For now, buyers face a market where affordability remains difficult and available supply is constrained. Homeowners with favorable mortgages have a strong financial reason to stay put, helping keep the region’s housing market tight despite slower statewide activity.
Readers can track statewide inventory through the California Association of Realtors housing reports.
