Most listings are in the $20's per square foot per year. The Casas Adobes region is experiencing a decline in rates. In the last 3 months, the median rate fell $5 per sqft per year. That's a 16% decrease in rent.
Compared to the rest of the Tucson Metropolitan Area market, the Casas Adobes submarket has lower rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 8 listings have been posted online, which means office spaces are probably leasing quickly. You'll want to be prepared to make an offer immediately. About 13% of the available leases in the Casas Adobes 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 on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,360 sqft. Most buildings in this area are around 2 stories. Most buildings in this market were built in 2002 and are Class B.