Most listings are in the $30's per square foot per year. The Rollingwood submarket is going through a a boost in rates. In the last 3 months, the median rate rose $32 per sqft per year.
Compared to the rest of the Greater Austin market, the Rollingwood region has greater rates, and you'll need to make a great offer to be in this hot submarket.
In the last 90 days, 2 listings have been listed, which means office spaces most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 50% of the available leases in the Rollingwood 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,130 sqft. Most properties in this market are approximately 2 floors. Most buildings in this market were built in 1984 and are Class A.