The typical asking rate per listing is in the $10's per square foot per year. The Round Rock region is experiencing a an increase in rates. In the last 3 months, the median rate increased $16 per sqft per year.
Compared to the rest of the Greater Austin market, the Round Rock region has less expensive rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 3 listings have been listed, which means listings are probably going fast. You'll want to be prepared to make an offer immediately. About 300% of the listings in the Round Rock 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 posted, so finding a space for a small business might be tough.
Even though the median size is 3,500 sqft, there are still 0 listings below 2,000 sqft. Most buildings in this region are around 2 stories. Most buildings in this market were built in 2001 and are Class B.