Compared to the rest of the Bay Area market, the Windsor region has lower rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 3 listings have come on the market, which means office spaces are probably leasing quickly. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,310 sqft. Most buildings in this market are around 2 stories. Most buildings in this market were built in 2002 and are Class B.