Most listings are in the $20's per square foot per year. The San Bernardino submarket is seeing a a boost in rates. In the last 3 months, the median rate increased $7 per sqft per year. That's a 50% rise in rent.
Compared to the rest of the Metropolitan Los Angeles market, the San Bernardino region has smaller rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 27 listings have been posted online, which means office spaces are probably going fast. 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.
Even though the median size is 3,760 sqft, there are still 0 listings below 2,000 sqft. Most buildings in this area are around 2 floors. Most buildings in this market were built in 1984 and are Class B.