On average, listings lease in the $20's per square foot per year. The Colorado region is seeing a an increase in rates. In the last 3 months, the median rate increased $1 per sqft per year. That's a 4% increase in rent.
In the last 90 days, 1932 listings have come on the market, so you'll want to check back regularly for new listings. About 3% of the listings in the Colorado are subleases, so you will probably have to focus your search on direct office leases. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,190 sqft. Most buildings in this market are close to 2 stories. Most buildings in this market were built in 1980 and are Class B.