The typical asking rate per listing is in the $20's per square foot per year. The Apple Valley region is seeing a an increase in rates. In the last 3 months, the median rate went up $13 per sqft per year. That's a 94% increase in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Apple Valley region has smaller rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 3 listings have been listed, which means new availabilities most likley are 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 1,500 sqft. Most buildings in this area are approximately 2 stories. Most buildings in this market were built in 1990 and are Class B.