Most listings are in the $20's per square foot per year. The College Station submarket is going through a decrease in rates. In the last 3 months, the median rate fell $3 per sqft per year. That's a 11% decline in rent.
In the last 90 days, 4 listings have been listed, which means spaces are probably leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 25% of the available leases in the College Station 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,000 sqft. Most properties in this market are close to 3 floors. Most buildings in this area were built in 2005 and are Class A.