On average, listings lease in the $20's per square foot per year. The Soquel region is going through a an increase in rates. In the last 3 months, the median rate rose $21 per sqft per year.
In the last 90 days, 6 listings have been made available, which means new listings most likley are leasing quickly. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,100 sqft. Most buildings in this market were built in 1989 and are Class B.