Most listings are in the $20's per square foot per year. The Riverside region is experiencing a decline in rates. In the last 3 months, the median rate fell $3 per sqft per year. That's a 10% decline in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Riverside submarket has lower rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 65 listings have been posted online, so you'll want to check back regularly for new listings. About 60% of the available leases in the Riverside are subleases, so you might be able to snag a great spot on a short term. 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 8,990 sqft, there are still 0 new availabilities below 2,000 sqft. Most properties in this area are around 2 stories. Most buildings in this market were built in 1989 and are Class B.