Most listings are in the $10's per square foot per year. The Colorado Springs submarket is going through a a boost in rates. In the last 3 months, the median rate went up $18 per sqft per year.
In the last 90 days, 476 listings have been posted online, so you'll want to check back regularly for new listings. About 70% of the available leases in the Colorado Springs 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 on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,320 sqft. Most buildings in this market are around 2 floors. Most buildings in this area were built in 1964 and are Class Class B.