Most listings are in the $40's per square foot per year. The Monterey Park region is going through a a rise in rates. In the last 3 months, the median rate increased $43 per sqft per year.
Compared to the rest of the Metropolitan Los Angeles market, the Monterey Park submarket has higher rates, and you'll need to pay a premium to be in this hot region.
In the last 90 days, 7 listings have been made available, which means new availabilities 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,370 sqft. Most buildings in this area are approximately 3 stories. Most buildings in this area were built in 1982 and are Class A.