Most listings are 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 increased $35 per sqft per year.
Compared to the rest of the Metropolitan Los Angeles market, the Claremont region has less expensive rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 1 listings have been posted online, which means leases might be going fast. You'll want to be prepared to make an offer immediately. About 300% of the available space in the Claremont are subleases, so you might be able to snag a great spot on a short term. 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 buildings in this area are close to 1 stories. Most buildings in this area were built in 2003 and are Class B.