Most listings are in the $20's per square foot per year. The McLennan County submarket is going through a a rise in rates. In the last 3 months, the median rate went up $21 per sqft per year.
In the last 90 days, 15 listings have come on the market, which means office spaces most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 7% of the listings in the McLennan County are subleases, so you will probably need to consider the implications of signing a direct lease with the building. 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 1,560 sqft. Most properties in this market are around 2 floors. Most buildings in this region were built in 1984 and are Class A.