Compared to the rest of the Seattle Metropolitan Area market, the Des Moines region has less expensive rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 1 listings have been made available, which means leases are probably going fast. You'll want to be prepared to tour spaces as quick as possible. 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 970 sqft. Most properties in this area are approximately 2 floors. Most buildings in this market were built in 1962 and are Class B.