Most listings are in the $30's per square foot per year. The Riverside submarket is experiencing a a rise in rates. In the last 3 months, the median rate went up $2 per sqft per year. That's a 5% increase in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Riverside region has less expensive rates, so you should have no trouble finding a great deal in this discounted submarket.
In the last 90 days, 65 listings have come on the market, 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 3,510 sqft, there are still 0 listings below 2,000 sqft. Most properties in this region are approximately 2 floors. Most buildings in this area were built in 1990 and are Class C.