Most listings are in the $30's per square foot per year. The Danville submarket is seeing a a boost in rates. In the last 3 months, the median rate increased $40 per sqft per year.
Compared to the rest of the East Bay market, the Danville submarket has smaller rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 5 listings have come on the market, which means spaces are probably going fast. You'll want to be prepared to make an offer immediately. About 60% of the office spaces in the Danville are subleases, so you might be able to snag a great spot on a short term. 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 1,750 sqft. Most properties in this market are around 2 stories. Most buildings in this market were built in 1982 and are Class B.