On average, listings lease in the $20's per square foot per year. The College Station submarket is going through a a boost in rates. In the last 3 months, the median rate increased $21 per sqft per year.
In the last 90 days, 4 listings have been listed, which means leases might be going fast. You'll want to be prepared to tour spaces as quick as possible. About 175% of the available leases in the College Station 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 2,000 sqft. Most buildings in this area are around 3 stories. Most buildings in this market were built in 2005 and are Class A.