Most listings are in the $20's per square foot per year. The Corpus Christi region is going through a an increase in rates. In the last 3 months, the median rate went up $2 per sqft per year. That's a 12% rise in rent.
In the last 90 days, 14 listings have been made available, which means office spaces might be 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.
The standard measurement for office space in this area is around 1,900 sqft. Most buildings in this region are close to 2 stories. Most buildings in this market were built in 1985 and are Class B.