Compared to the rest of the Bay Area market, the Vacaville region has less expensive rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 1 listings have been posted online, which means new availabilities most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. 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 700 sqft. Most buildings in this market are approximately 1 stories. Most buildings in this market were built in 1988 and are Class B.