Most listings are in the $20's per square foot per year. The Rancho Cucamonga submarket is seeing a a rise in rates. In the last 3 months, the median rate went up $1 per sqft per year. That's a 2% increase in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Rancho Cucamonga region has lower rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 49 listings have been posted online, so you'll want to check back regularly for new listings. About 2% of the listings in the Rancho Cucamonga are subleases, so you will probably need to consider the implications of signing a direct lease with the building. 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 1,870 sqft. Most buildings in this market are close to 2 stories. Most buildings in this region were built in 1991 and are Class B.