On average, listings lease in the $30's per square foot per year. The Seven Fields submarket is going through a a boost in rates. In the last 3 months, the median rate increased $32 per sqft per year.
In the last 90 days, 3 listings have been posted online, which means office spaces most likley are going fast. You'll want to be prepared to make an offer immediately. About 67% of the available leases in the Seven Fields are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 2,030 sqft. Most properties in this area are approximately 3 stories. Most buildings in this market were built in 1997 and are Class A.