On average, listings lease in the $20's per square foot per year. The Santa Ynez submarket is going through a decline in rates. In the last 3 months, the median rate decreased $8 per sqft per year. That's a 24% decrease in rent.
In the last 90 days, 2 listings have been posted online, which means listings most likley are going fast. You'll want to be prepared to make an offer immediately. About 50% of the office spaces in the Santa Ynez are subleases, so you might be able to find a shorter term or below market rent. 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 1,480 sqft. Most buildings in this area were built in 1986.