The typical asking rate per listing is in the $10's per square foot per year. The Castle Hills submarket is seeing a decrease in rates. In the last 3 months, the median rate fell $12 per sqft per year. That's a 41% decline in rent.
Compared to the rest of the Greater Austin market, the Castle Hills region has smaller rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 19 listings have been listed, which means office spaces most likley are going fast. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
Even though the median size is 4,230 sqft, there are still 0 leases below 2,000 sqft. Most buildings in this area are around 4 stories. Most buildings in this region were built in 1982 and are Class B.