On average, listings lease in the $30's per square foot per year. The Castle Rock region is going through a a boost in rates. In the last 3 months, the median rate increased $3 per sqft per year. That's a 12% increase in rent.
Compared to the rest of the Denver Metro market, the Castle Rock region has greater rates, and you'll need to make a great offer to be in this hot submarket.
In the last 90 days, 18 listings have been posted online, which means listings are probably leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 11% of the office spaces in the Castle Rock 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 650 sqft. Most properties in this region are around 2 stories. Most buildings in this area were built in 2001 and are Class B.