On average, listings lease in the $10's per square foot per year. The Seven Oaks region is going through a decrease in rates. In the last 3 months, the median rate decreased $7 per sqft per year. That's a 31% decline in rent.
In the last 90 days, 35 listings have been listed, which means office spaces most likley are going fast. You'll want to be prepared to make an offer immediately. 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 1,000 sqft. Most properties in this area are around 2 stories. Most buildings in this area were built in 1982 and are Class C.