Compared to the rest of the Metropolitan Los Angeles market, the Diamond Bar submarket has greater rates, and you'll have to negotiate above asking rent to be in this hot submarket.
In the last 90 days, 6 listings have been listed, which means spaces 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,330 sqft. Most buildings in this region are around 2 floors. Most buildings in this market were built in 1988 and are Class B.