The typical asking rate per listing is in the $10's per square foot per year. The Colton submarket is seeing a a rise in rates. In the last 3 months, the median rate went up $0 per sqft per year. That's a 1% rise in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Colton region has lower rates, so you should have no trouble finding a great deal in this discounted submarket.
In the last 90 days, 24 listings have been posted online, which means new listings most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 8% of the listings in the Colton are subleases, so you will probably need to sign a longer term lease with the landlord directly. 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 1,750 sqft. Most buildings in this region are approximately 2 floors. Most buildings in this area were built in 1985 and are Class B.