The typical asking rate per listing is in the $20's per square foot per year. The Casselberry region is experiencing a an increase in rates. In the last 3 months, the median rate increased $21 per sqft per year.
In the last 90 days, 10 listings have been posted online, which means listings are probably going fast. You'll want to be prepared to make an offer immediately. About 100% of the listings in the Casselberry are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 16,500 sqft, there are still 0 listings below 2,000 sqft. Most properties in this area are close to 1 floors. Most buildings in this area were built in 1986 and are Class B.