On average, listings lease in the $30's per square foot per year. The Claremont region is experiencing a a boost 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 less expensive rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 1 listings have been made available, which means new listings most likley are 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 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 market are close to 1 floors. Most buildings in this market were built in 2003 and are Class B.