The typical asking rate per listing is in the $20's per square foot per year. The Grayson County submarket is going through a a boost in rates. In the last 3 months, the median rate went up $5 per sqft per year. That's a 29% rise in rent.
In the last 90 days, 1 listings have been made available, which means office spaces most likley are leasing quickly. You'll want to be prepared to make an offer immediately. 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 1,150 sqft. Most properties in this region are around 5 floors. Most buildings in this region were built in 2005 and are Class B.