Most listings are in the $20's per square foot per year. The Riverside submarket is going through a decrease in rates. In the last 3 months, the median rate decreased $6 per sqft per year. That's a 23% decline in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Riverside region has lower rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 65 listings have been made available, so you'll want to check back regularly for new listings. About 88% of the available leases in the Riverside are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 6,200 sqft, there are still 0 leases below 2,000 sqft. Most buildings in this market are approximately 2 stories. Most buildings in this region were built in 1989 and are Class B.