Most listings are in the $30's per square foot per year. The Monrovia submarket is going through a an increase in rates. In the last 3 months, the median rate went up $6 per sqft per year. That's a 21% increase in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Monrovia submarket has lower rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 25 listings have been made available, which means listings are probably going fast. 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.
Even though the median size is 6,150 sqft, there are still 0 new listings below 2,000 sqft. Most buildings in this region are around 2 floors. Most buildings in this region were built in 1982 and are Class B.