The typical asking rate per listing is in the $30's per square foot per year. The Claremont region is seeing a an increase in rates. In the last 3 months, the median rate rose $35 per sqft per year.
Compared to the rest of the Metropolitan Los Angeles market, the Claremont submarket has lower rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 1 listings have been listed, which means new availabilities most likley are leasing quickly. You'll want to be prepared to make an offer immediately. 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 1,180 sqft. Most properties in this area are approximately 1 stories. Most buildings in this market were built in 2003 and are Class B.