Most listings are in the $30's per square foot per year. The Claremont submarket is experiencing a a rise 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 submarket has smaller rates, so you should have no trouble finding a great deal in this discounted submarket.
In the last 90 days, 1 listings have been made available, which means leases are probably leasing quickly. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet available, 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 market are close to 1 floors. Most buildings in this region were built in 2003 and are Class B.