Compared to the rest of the Washington D.C. market, the Cascades region has less expensive rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 3 listings have been listed, which means spaces most likley are going fast. You'll want to be prepared to make an offer immediately. About 400% of the available leases in the Cascades are subleases, so you might be able to find a shorter term or below market rent. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,000 sqft. Most buildings in this area are approximately 3 stories. Most buildings in this market were built in 2002 and are Class B.