Most listings are in the $20's per square foot per year. The Aurora submarket is going through a decrease in rates. In the last 3 months, the median rate decreased $1 per sqft per year. That's a 5% decline in rent.
Compared to the rest of the Denver Metro market, the Aurora region has smaller rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 111 listings have been listed, so you'll want to check back regularly for new listings. About 1% of the office spaces in the Aurora are subleases, so you will probably have to consider a longer term lease. 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 2,020 sqft. Most buildings in this market are around 2 floors. Most buildings in this market were built in 1984 and are Class B.