Most listings are in the $0's per square foot per year. The Rohnert Park region is experiencing a decrease in rates. In the last 3 months, the median rate fell $28 per sqft per year. That's a 100% decrease in rent.
In the last 90 days, 10 listings have been made available, which means new availabilities most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 10% of the available space in the Rohnert Park 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 on the market, so finding a space for a small business might be tough.
Even though the median size is 2,980 sqft, there are still 0 office spaces below 2,000 sqft. Most buildings in this area are approximately 1 floors. Most buildings in this region were built in 1986 and are Class B.