Most listings are in the $20's per square foot per year. The Sierra Vista submarket is going through a a boost in rates. In the last 3 months, the median rate rose $8 per sqft per year. That's a 38% rise in rent.
In the last 90 days, 23 listings have come on the market, which means leases 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 1,750 sqft. Most properties in this market are close to 2 floors. Most buildings in this region were built in 2008 and are Class A.