The typical asking rate per listing is in the $20's per square foot per year. The Eagle region is going through a decline in rates. In the last 3 months, the median rate fell $1 per sqft per year. That's a 6% decline in rent.
In the last 90 days, 35 listings have been posted online, which means office spaces most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 3% of the listings in the Eagle are subleases, so you will probably have to consider a longer term 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 1,640 sqft. Most properties in this region are approximately 1 floors. Most buildings in this area were built in 2005 and are Class A.