The typical asking rate per listing is in the $10's per square foot per year. The Dallas County region is going through a a rise in rates. In the last 3 months, the median rate rose $3 per sqft per year. That's a 19% rise in rent.
In the last 90 days, 32 listings have come on the market, which means new listings are probably going fast. You'll want to be prepared to make an offer immediately. About 59% of the office spaces in the Dallas County are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 2,780 sqft, there are still 0 listings below 2,000 sqft. Most buildings in this area are close to 1 floors. Most buildings in this market were built in 2003 and are Class A.