For a number of years, San Mateo County house prices have not appreciated as much as Santa Clara County house prices. After 2022 the two counties had very similar house prices, where previously San Mateo County had higher prices.
This change in real estate house price trends for San Mateo County vs. Santa Clara County is not the only real estate trend that has changed between the two counties.
In the graph above the San Mateo County house age is plotted in strong colors. The Santa Clara County house age is plotted in faint colors.
The plot of house age shows an abrupt change for San Mateo County trends in 2019, while Santa Clara County trends remain constant.
Looking into more detail, shows that cities close to San Francisco have had flatter house prices than cities further south but still in San Mateo County. These cities include Brisbane, Daly City, Pacifica, and San Bruno.
The graph of San Mateo County house price vs San Bruno house price shows that in early 2021, San Bruno prices did not grow as much as San Mateo County and the separation has remained.
Does San Bruno show a change in the house age trend vs. San Mateo County?
The graph above shows the San Bruno house age in strong colors having a greater change than San Mateo County house age, which is shown in faint colors.
The lack of newer houses that were previously available in San Mateo County is likely a significant factor in the house prices of San Mateo County moving close to the house prices of Santa Clara County. With few new houses expected to be built the separation in house prices between San Mateo County and Santa Clara County is likely ended.