Most listings are in the $20's per square foot per year. The Apple Valley region is experiencing a a rise in rates. In the last 3 months, the median rate rose $5 per sqft per year. That's a 30% increase in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Apple Valley region has less expensive rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 5 listings have been posted online, which means new listings are probably leasing quickly. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet available, 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 buildings in this market are approximately 2 stories. Most buildings in this region were built in 1989 and are Class B.