On average, listings lease in the $30's per square foot per year. The Chino region is seeing a decrease in rates. In the last 3 months, the median rate decreased $3 per sqft per year. That's a 9% decrease in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Chino region has smaller rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 10 listings have been made available, which means new availabilities most likley are going fast. You'll want to be prepared to make an offer immediately. About 60% of the office spaces in the Chino are subleases, so you might be able to find a shorter term or below market rent. 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 2,270 sqft. Most properties in this area are close to 1 floors. Most buildings in this area were built in 2003 and are Class A.