The typical asking rate per listing is in the $10's per square foot per year. The San Bernardino region is seeing a decline in rates. In the last 3 months, the median rate fell $6 per sqft per year. That's a 28% decrease in rent.
Compared to the rest of the Metropolitan Los Angeles market, the San Bernardino submarket has smaller rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 86 listings have come on the market, so you'll want to check back regularly for new listings. About 5% of the listings in the San Bernardino are subleases, so you will probably have to focus your search on direct office leases. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 770 sqft. Most buildings in this market are around 2 floors. Most buildings in this area were built in 1984 and are Class B.