The typical asking rate per listing is in the $20's per square foot per year. The Casselberry submarket is experiencing a an increase in rates. In the last 3 months, the median rate went up $21 per sqft per year.
In the last 90 days, 10 listings have come on the market, which means leases are probably leasing quickly. You'll want to be prepared to make an offer immediately. About 60% of the available space in the Casselberry 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 1,500 sqft. Most properties in this region are approximately 1 floors. Most buildings in this market were built in 1986 and are Class B.