On average, listings lease in the $30's per square foot per year. The Monrovia region is seeing a a rise in rates. In the last 3 months, the median rate rose $4 per sqft per year. That's a 13% increase in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Monrovia region has lower rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 5 listings have been made available, which means new listings are probably leasing quickly. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
Even though the median size is 8,900 sqft, there are still 0 office spaces below 2,000 sqft. Most properties in this market are approximately 2 stories. Most buildings in this area were built in 1982 and are Class B.