The typical asking rate per listing is in the $20's per square foot per year. The Lafayette region is going through a an increase in rates. In the last 3 months, the median rate went up $2 per sqft per year. That's a 8% increase in rent.
In the last 90 days, 33 listings have been posted online, which means office spaces most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 109% of the available leases in the Lafayette 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,200 sqft. Most buildings in this region are around 2 floors. Most buildings in this area were built in 0 and are Class B.