On average, listings lease in the $20's per square foot per year. The Kennesaw submarket is seeing a a rise in rates. In the last 3 months, the median rate rose $21 per sqft per year.
Compared to the rest of the Metro Atlanta market, the Kennesaw region has less expensive rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 15 listings have been posted online, which means leases are probably leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 7% of the available leases in the Kennesaw are subleases, so you will probably have to consider a longer term lease. There aren't many listings below 2,000 square feet available, 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 buildings in this area are approximately 2 stories. Most buildings in this market were built in 1999 and are Class B.