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 discounted submarket.
In the last 90 days, 200 listings have been made available, so you'll want to check back regularly for new listings. About 4% of the available leases in the Santa Rosa are subleases, so you will probably need to sign a longer term lease with the landlord directly. 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 2,370 sqft. Most properties in this region are around 2 stories. Most buildings in this market were built in 1982 and are Class B.