The typical asking rate per listing is in the $30's per square foot per year. The Claremont region is seeing a a boost in rates. In the last 3 months, the median rate rose $6 per sqft per year. That's a 24% increase in rent.
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 discounted submarket.
In the last 90 days, 4 listings have been listed, which means new availabilities might be leasing quickly. You'll want to be prepared to tour spaces as quick as possible. 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 610 sqft. Most buildings in this market are around 1 floors. Most buildings in this market were built in 2008 and are Class B.