On average, listings lease in the $10's per square foot per year. The Gunbarrel submarket is seeing a an increase in rates. In the last 3 months, the median rate increased $19 per sqft per year. That's a Inf% increase in rent.
In the last 90 days, 4 listings have come on the market, which means office spaces most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 25% of the available leases in the Gunbarrel 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 posted, so finding a space for a small business might be tough.
Even though the median size is 11,000 sqft, there are still 0 office spaces below 2,000 sqft.