Most listings are in the $30's per square foot per year. The Lone Tree submarket is going through a a rise in rates. In the last 3 months, the median rate went up $32 per sqft per year.
Compared to the rest of the Denver Metro market, the Lone Tree region has more expensive rates, and you'll need to pay a premium to be in this hot region.
In the last 90 days, 7 listings have come on the market, which means new listings most likley are going fast. You'll want to be prepared to make an offer immediately. About 129% of the available leases in the Lone Tree are subleases, so you might be able to snag a great spot on a short term. 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 2,000 sqft. Most buildings in this region are approximately 1 floors. Most buildings in this region were built in 2003 and are Class A.