The typical asking rate per listing is in the $30's per square foot per year. The Apple Valley region is going through a a rise in rates. In the last 3 months, the median rate went up $17 per sqft per year. That's a 100% increase in rent.
In the last 90 days, 10 listings have been listed, which means office spaces are probably going fast. 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 2,100 sqft. Most properties in this region are approximately 1 floors. Most buildings in this region were built in 1989 and are Class A.