In the last 90 days, 2102 listings have come on the market, so you'll want to check back regularly for new listings. About 2% of the office spaces in the DFW Metroplex are subleases, so you will probably need to sign a longer term lease with the landlord directly. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,740 sqft. Most buildings in this market are around 2 stories. Most buildings in this region were built in 1985 and are Class B.