On average, listings lease in the $20's per square foot per year. The Dallas County region is experiencing a an increase in rates. In the last 3 months, the median rate went up $0 per sqft per year. That's a 2% rise in rent.
In the last 90 days, 2553 listings have come on the market, so you'll want to check back regularly for new listings. About 2% of the available leases in the Dallas County are subleases, so you will probably have to focus your search on direct office leases. 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 1,520 sqft. Most buildings in this region are close to 3 stories. Most buildings in this market were built in 1983 and are Class B.