Most listings are in the $20's per square foot per year. The Oro Valley region is seeing a decline in rates. In the last 3 months, the median rate decreased $9 per sqft per year. That's a 28% decline in rent.
Compared to the rest of the Tucson Metropolitan Area market, the Oro Valley region has lower rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 20 listings have been made available, which means new listings are probably leasing quickly. You'll want to be prepared to make an offer immediately. 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 1,200 sqft. Most buildings in this area are approximately 2 floors. Most buildings in this market were built in 2008 and are Class A.