Most listings are in the $10's per square foot per year. The Harlingen submarket is seeing a a rise in rates. In the last 3 months, the median rate went up $20 per sqft per year. That's a Inf% rise in rent.
In the last 90 days, 3 listings have been made available, which means leases are probably going fast. You'll want to be prepared to tour spaces as quick as possible. 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 15,000 sqft, there are still 0 new listings below 2,000 sqft. Most properties in this area are around 2 floors. Most buildings in this market were built in 1997 and are Class B.