Most listings are in the $20's per square foot per year. The Glendora region is seeing a decline in rates. In the last 3 months, the median rate decreased $22 per sqft per year. That's a 43% decrease in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Glendora submarket has less expensive rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 7 listings have come on the market, which means new availabilities are probably leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 14% of the office spaces in the Glendora 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 2,190 sqft. Most buildings in this market are close to 2 stories. Most buildings in this region were built in 1985 and are Class B.