On average, listings lease in the $20's per square foot per year. The San Bernardino submarket is experiencing a decrease in rates. In the last 3 months, the median rate decreased $4 per sqft per year. That's a 13% decline in rent.
Compared to the rest of the Metropolitan Los Angeles market, the San Bernardino region has lower rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 34 listings have been made available, which means new listings most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. About 3% of the available space in the San Bernardino are subleases, so you will probably need to consider the implications of signing a direct lease with the building. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
Even though the median size is 4,190 sqft, there are still 0 spaces below 2,000 sqft. Most buildings in this market are around 2 floors. Most buildings in this area were built in 1984 and are Class B.