Compared to the rest of the Metropolitan Los Angeles market, the Upland region has smaller rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 13 listings have been posted online, which means spaces most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. About 8% of the office spaces in the Upland 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 2,020 sqft. Most properties in this market are close to 2 floors. Most buildings in this area were built in 1987 and are Class B.