Most listings are in the $10's per square foot per year. The Punta Gorda region is seeing a a rise in rates. In the last 3 months, the median rate went up $16 per sqft per year.
In the last 90 days, 4 listings have been posted online, which means leases most likley are leasing quickly. You'll want to be prepared to make an offer immediately. 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 1,610 sqft. Most buildings in this area are around 1 stories. Most buildings in this region were built in 1990 and are Class B.