Most listings are in the $20's per square foot per year. The Oro Valley submarket is seeing a decline in rates. In the last 3 months, the median rate decreased $9 per sqft per year. That's a 28% decrease 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 depreciated region.
In the last 90 days, 19 listings have come on the market, which means new availabilities most likley are going fast. You'll want to be prepared to make an offer immediately. 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 1,200 sqft. Most properties in this market are close to 2 floors. Most buildings in this region were built in 2008 and are Class A.