The typical asking rate per listing is in the $20's per square foot per year. The Cascades submarket is going through a a boost in rates. In the last 3 months, the median rate rose $24 per sqft per year.
Compared to the rest of the Washington D.C. market, the Cascades submarket has less expensive rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 3 listings have come on the market, which means new listings might be 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 1,770 sqft. Most properties in this market are approximately 3 stories. Most buildings in this area were built in 2001 and are Class B.