Most listings are in the $20's per square foot per year. The Buellton region is going through a an increase in rates. In the last 3 months, the median rate increased $2 per sqft per year. That's a 11% rise in rent.
In the last 90 days, 1 listings have been posted online, which means leases most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. 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 230 sqft. Most properties in this region are around 1 floors. Most buildings in this region were built in 2008.