Most listings are in the $30's per square foot per year. The Gainesville region is seeing a decline in rates. In the last 3 months, the median rate fell $8 per sqft per year. That's a 20% decrease in rent.
Compared to the rest of the Washington D.C. market, the Gainesville region has less expensive rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 4 listings have been made available, which means new listings 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 830 sqft. Most properties in this region are close to 3 floors. Most buildings in this market were built in 2001 and are Class B.