Most listings are in the $20's per square foot per year. The North Washington submarket is going through a a rise in rates. In the last 3 months, the median rate rose $21 per sqft per year.
Compared to the rest of the Denver Metro market, the North Washington region has less expensive rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 1 listings have been listed, which means leases are probably leasing quickly. You'll want to be prepared to make an offer immediately. About 300% of the available leases in the North Washington 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.
Even though the median size is 3,540 sqft, there are still 0 new listings below 2,000 sqft. Most buildings in this area are around 3 floors. Most buildings in this market were built in 1955 and are Class B.