Most listings are in the $20's per square foot per year. The Oro Valley region is going through a a rise in rates. In the last 3 months, the median rate increased $7 per sqft per year. That's a 42% increase in rent.
Compared to the rest of the Tucson Metropolitan Area market, the Oro Valley submarket has smaller rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 5 listings have come on the market, which means listings might be leasing quickly. You'll want to be prepared to tour spaces as quick as possible. 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 properties in this area are around 2 stories. Most buildings in this market were built in 2007 and are Class A.