On average, listings lease in the $20's per square foot per year. The New Braunfels submarket is going through a decline in rates. In the last 3 months, the median rate fell $13 per sqft per year. That's a 31% decrease in rent.
Compared to the rest of the Greater Austin market, the New Braunfels submarket has smaller rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 8 listings have been listed, which means listings most likley are leasing quickly. 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.
The standard measurement for office space in this area is around 480 sqft. Most properties in this region are approximately 2 floors. Most buildings in this market were built in 2002 and are Class A.