On average, listings lease in the $20's per square foot per year. The Petaluma submarket is going through a decline in rates. In the last 3 months, the median rate decreased $5 per sqft per year. That's a 15% decrease in rent.
Compared to the rest of the Bay Area market, the Petaluma submarket has less expensive rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 31 listings have been posted online, which means new listings are probably going fast. You'll want to be prepared to tour spaces as quick as possible. About 52% of the available space in the Petaluma are subleases, so you might be able to snag a great spot on a short term. 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 2,530 sqft, there are still 0 listings below 2,000 sqft. Most buildings in this region are around 2 floors. Most buildings in this market were built in 1990 and are Class A.