Most listings are in the $20's per square foot per year. The Ontario submarket is experiencing a a rise in rates. In the last 3 months, the median rate went up $3 per sqft per year. That's a 12% rise in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Ontario submarket has less expensive rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 62 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 available, so finding a space for a small business might be tough.
Even though the median size is 3,110 sqft, there are still 0 spaces below 2,000 sqft. Most properties in this market are around 2 stories. Most buildings in this region were built in 2002 and are Class A.