Most listings are in the $20's per square foot per year. The Rancho Cucamonga submarket is seeing a an increase in rates. In the last 3 months, the median rate rose $5 per sqft per year. That's a 21% increase in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Rancho Cucamonga submarket has smaller rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 64 listings have been made available, so you'll want to check back regularly for new listings. 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 1,560 sqft. Most buildings in this area are close to 2 floors. Most buildings in this region were built in 1992 and are Class B.