On average, listings lease in the $20's per square foot per year. The Lower Arapahoe region is seeing a a rise in rates. In the last 3 months, the median rate rose $22 per sqft per year. That's a Inf% rise in rent.
In the last 90 days, 1 listings have been posted online, which means spaces most likley are leasing quickly. 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 2,260 sqft.