On average, listings lease in the $20's per square foot per year. The Aurora region is going through a an increase in rates. In the last 3 months, the median rate went up $21 per sqft per year.
Compared to the rest of the Denver Metro market, the Aurora submarket has lower rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 111 listings have been made available, so you'll want to check back regularly for new listings. About 75% of the office spaces in the Aurora are subleases, so you might be able to sign a shorter term by taking over a previous 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 1,950 sqft. Most buildings in this region are approximately 2 stories. Most buildings in this area were built in 1984 and are Class B.