Most listings are in the $20's per square foot per year. The Cascades region is experiencing a an increase in rates. In the last 3 months, the median rate went up $3 per sqft per year. That's a 13% rise in rent.
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 submarket.
In the last 90 days, 3 listings have been posted online, which means leases are probably 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 buildings in this region are close to 3 floors. Most buildings in this region were built in 2001 and are Class B.