Most listings are in the $20's per square foot per year. The Columbine submarket is going through a a rise in rates. In the last 3 months, the median rate rose $23 per sqft per year.
Compared to the rest of the Denver Metro market, the Columbine submarket has less expensive rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 3 listings have been posted online, which means new availabilities most likley are 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 1,790 sqft. Most buildings in this market were built in 1985.