On average, listings lease in the $20's per square foot per year. The Tucson region is experiencing a an increase in rates. In the last 3 months, the median rate rose $1 per sqft per year. That's a 5% increase in rent.
Compared to the rest of the Tucson Metropolitan Area market, the Tucson region has less expensive rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 111 listings have come on the market, so you'll want to check back regularly for new listings. About 1% of the available space in the Tucson 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 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 2,030 sqft. Most buildings in this area are around 2 stories. Most buildings in this area were built in 1982 and are Class B.