Compared to the rest of the Metropolitan Los Angeles market, the Moreno Valley submarket has lower rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 3 listings have come on the market, which means listings most likley are leasing quickly. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,090 sqft. Most properties in this region are close to 2 stories. Most buildings in this area were built in 1989 and are Class B.