The typical asking rate per listing is in the $10's per square foot per year. The Sherman submarket is seeing a a boost in rates. In the last 3 months, the median rate went up $18 per sqft per year. That's a Inf% increase in rent.
In the last 90 days, 11 listings have been made available, which means leases are probably leasing quickly. You'll want to be prepared to tour spaces as quick as possible. 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 490 sqft. Most properties in this region are approximately 5 stories. Most buildings in this market were built in 1996 and are Class B.