The typical asking rate per listing is in the $20's per square foot per year. The Colorado submarket is seeing a a boost in rates. In the last 3 months, the median rate went up $1 per sqft per year. That's a 6% rise in rent.
In the last 90 days, 1535 listings have been posted online, so you'll want to check back regularly for new listings. About 5% of the office spaces in the Colorado are subleases, so you will probably have to consider a longer term lease. 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 2,060 sqft. Most buildings in this area are close to 2 stories. Most buildings in this market were built in 1980 and are Class B.