On average, listings lease in the $30's per square foot per year. The Benicia submarket is going through a a boost in rates. In the last 3 months, the median rate increased $10 per sqft per year. That's a 50% rise in rent.
Compared to the rest of the Bay Area market, the Benicia region has lower rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 3 listings have been made available, which means office spaces are probably going fast. 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.
Even though the median size is 5,040 sqft, there are still 0 new listings below 2,000 sqft. Most properties in this area are around 1 floors. Most buildings in this area were built in 1990 and are Class B.