Most listings are in the $20's per square foot per year. The Ken Caryl submarket is going through a a rise in rates. In the last 3 months, the median rate increased $3 per sqft per year. That's a 17% rise in rent.
Compared to the rest of the Denver Metro market, the Ken Caryl submarket has lower rates, so you should have no trouble finding a great deal in this discounted submarket.
In the last 90 days, 13 listings have come on the market, which means listings are probably leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 8% of the available leases in the Ken Caryl are subleases, so you will probably need to consider the implications of signing a direct lease with the building. 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 1,640 sqft. Most buildings in this market are close to 2 stories. Most buildings in this area were built in 2002 and are Class A.