Most listings are in the $20's per square foot per year. The San Joaquin region is going through a an increase in rates. In the last 3 months, the median rate increased $4 per sqft per year. That's a 23% increase in rent.
In the last 90 days, 108 listings have been made available, so you'll want to check back regularly for new listings. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,920 sqft. Most buildings in this area are close to 0 floors. Most buildings in this market were built in 1976 and are Class A.