Like many parts of the country, California's housing market has suffered from chronically low inventory levels for quite some time. Supply levels dropped further during the first few months of 2023 due to higher mortgage rates that cooled the real estate market. But in the early days of 2024, California housing market inventory levels are starting to rise again. And once again, mortgage rates play a central role. Rate reductions over the past couple of months have brought more sellers into the market, increasing inventory levels.