Most listings are in the $10's per square foot per year. The Lake City region is going through a decline in rates. In the last 3 months, the median rate decreased $16 per sqft per year. That's a 52% decline in rent.
In the last 90 days, 1 listings have been listed, which means spaces most likley are going fast. You'll want to be prepared to make an offer immediately. 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 1,840 sqft. Most buildings in this area were built in 2007 and are Class A.