Most listings are in the $20's per square foot per year. The Casas Adobes region is going through a decline in rates. In the last 3 months, the median rate decreased $1 per sqft per year. That's a 2% decrease in rent.
Compared to the rest of the Tucson Metropolitan Area market, the Casas Adobes region has greater rates, and you'll have to negotiate above asking rent to be in this hot region.
In the last 90 days, 14 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 7% of the office spaces in the Casas Adobes 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 2,110 sqft. Most buildings in this area are approximately 2 floors. Most buildings in this region were built in 2002 and are Class B.