Most listings are in the $10's per square foot per year. The Pima County region is experiencing a decrease in rates. In the last 3 months, the median rate fell $3 per sqft per year. That's a 13% decline in rent.
In the last 90 days, 244 listings have been posted online, so you'll want to check back regularly for new listings. About 5% of the available space in the Pima County are subleases, so you will probably need to consider the implications of signing a direct lease with the building. 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 1,570 sqft. Most properties in this market are close to 2 floors. Most buildings in this area were built in 1986 and are Class B.