The typical asking rate per listing is in the $10's per square foot per year. The Moreno Valley region is experiencing a an increase in rates. In the last 3 months, the median rate increased $20 per sqft per year.
Compared to the rest of the Metropolitan Los Angeles market, the Moreno Valley submarket has less expensive rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 3 listings have been made available, which means office spaces most likley are going fast. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 570 sqft. Most properties in this region are around 2 stories. Most buildings in this area were built in 1989 and are Class B.