The typical asking rate per listing is in the $20's per square foot per year. The Ontario submarket is going through a an increase in rates. In the last 3 months, the median rate rose $3 per sqft per year. That's a 12% increase in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Ontario region has smaller rates, so you should have no trouble finding a great deal in this discounted submarket.
In the last 90 days, 58 listings have been posted online, so you'll want to check back regularly for new listings. 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 3,060 sqft, there are still 0 leases below 2,000 sqft. Most buildings in this area are approximately 2 floors. Most buildings in this market were built in 2002 and are Class A.