On average, listings lease in the $10's per square foot per year. The Foley submarket is going through a an increase in rates. In the last 3 months, the median rate went up $17 per sqft per year.
In the last 90 days, 3 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 available leases in the Foley are subleases, so you might be able to snag a great spot on a short term. 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 1,500 sqft. Most properties in this region are around 1 floors. Most buildings in this market were built in 1999 and are Class B.