On average, listings lease in the $30's per square foot per year. The El Paso de Robles region is seeing a a rise in rates. In the last 3 months, the median rate increased $6 per sqft per year. That's a 24% rise in rent.
In the last 90 days, 8 listings have been made available, which means spaces might be 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,200 sqft.