The typical asking rate per listing is in the $10's per square foot per year. The Dallas County region is experiencing a decline in rates. In the last 3 months, the median rate fell $8 per sqft per year. That's a 36% decline in rent.
In the last 90 days, 12 listings have come on the market, which means office spaces might be leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 8% of the available leases in the Dallas County are subleases, so you will probably need to consider the implications of signing a direct lease with the building. 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 4,720 sqft, there are still 0 leases below 2,000 sqft. Most properties in this region are approximately 1 floors. Most buildings in this area were built in 1996 and are Class A.