The typical asking rate per listing is in the $10's per square foot per year. The Fontana submarket is seeing a a rise in rates. In the last 3 months, the median rate increased $13 per sqft per year. That's a Inf% rise in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Fontana submarket has smaller rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 6 listings have come on the market, which means new listings most likley are leasing quickly. You'll want to be prepared to make an offer immediately. 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 3,330 sqft, there are still 0 new listings below 2,000 sqft. Most buildings in this area are around 1 stories. Most buildings in this region were built in 1994 and are Class A.