On average, listings lease in the $20's per square foot per year. The Greater Austin submarket is going through a decrease in rates. In the last 3 months, the median rate decreased $1 per sqft per year. That's a 5% decline in rent.
In the last 90 days, 1061 listings have been made available, so you'll want to check back regularly for new listings. About 5% of the listings in the Greater Austin 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,345 sqft. Most properties in this region are around 2 floors. Most buildings in this area were built in 1986 and are Class A.