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 went up $1 per sqft per year. That's a 3% rise in rent.
Compared to the rest of the Washington D.C. market, the Cascades region has lower rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 2 listings have been posted online, which means listings might be leasing quickly. You'll want to be prepared to tour spaces as quick as possible. 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 1,580 sqft. Most properties in this market are around 3 stories. Most buildings in this area were built in 2001 and are Class B.