The typical asking rate per listing is in the $30's per square foot per year. The Napa submarket is seeing a decline in rates. In the last 3 months, the median rate fell $4 per sqft per year. That's a 9% decrease in rent.
In the last 90 days, 36 listings have come on the market, which means new listings might be 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 2,000 sqft. Most properties in this market are approximately 1 stories. Most buildings in this area were built in 1983 and are Class A.