Compared to the rest of the DFW Metroplex market, the Keller submarket has lower rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 7 listings have been listed, which means leases are probably leasing quickly. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,440 sqft. Most buildings in this area are approximately 1 stories. Most buildings in this region were built in 2006 and are Class B.