Compared to the rest of the Metropolitan Los Angeles market, the Azusa submarket has lower rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 9 listings have been made available, which means leases are probably 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 1,680 sqft. Most properties in this market are close to 2 floors. Most buildings in this area were built in 1987 and are Class C.