On average, listings lease in the $10's per square foot per year. The Manatee County region is going through a a rise in rates. In the last 3 months, the median rate rose $1 per sqft per year. That's a 7% rise in rent.
In the last 90 days, 25 listings have been posted online, which means new availabilities most likley are going fast. You'll want to be prepared to make an offer immediately. About 184% of the office spaces in the Manatee County are subleases, so you might be able to find a shorter term or below market rent. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,890 sqft. Most properties in this market are close to 1 stories. Most buildings in this area were built in 1972 and are Class B.