On average, listings lease in the $20's per square foot per year. The El Paso de Robles submarket is seeing a decline in rates. In the last 3 months, the median rate fell $20 per sqft per year. That's a 46% decline in rent.
In the last 90 days, 14 listings have come on the market, which means leases are probably going fast. You'll want to be prepared to tour spaces as quick as possible. About 7% of the listings in the El Paso de Robles are subleases, so you will probably need to sign a longer term lease with the landlord directly. 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 1,700 sqft. Most properties in this market are around 3 stories.