On average, listings lease in the $20's per square foot per year. The Santa Rosa submarket is experiencing a a rise in rates. In the last 3 months, the median rate increased $2 per sqft per year. That's a 6% increase in rent.
Compared to the rest of the Bay Area market, the Santa Rosa submarket has lower rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 36 listings have come on the market, which means spaces might be leasing quickly. You'll want to be prepared to make an offer immediately. About 225% of the available space in the Santa Rosa 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,780 sqft. Most properties in this market are close to 2 stories. Most buildings in this region were built in 1981 and are Class B.