The typical asking rate per listing is in the $20's per square foot per year. The Fort Worth region is going through a a boost in rates. In the last 3 months, the median rate rose $3 per sqft per year. That's a 14% rise in rent.
Compared to the rest of the DFW Metroplex market, the Fort Worth region has higher rates, and you'll have to negotiate above asking rent to be in this hot submarket.
In the last 90 days, 239 listings have been listed, so you'll want to check back regularly for new listings. About 4% of the listings in the Fort Worth 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 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 2,500 sqft. Most properties in this region are around 1 floors. Most buildings in this market were built in 1984 and are Class B.