On average, listings lease in the $30's per square foot per year. The Diamond Bar region is experiencing a decline in rates. In the last 3 months, the median rate fell $2 per sqft per year. That's a 7% decline in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Diamond Bar region has smaller rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 4 listings have come on the market, which means new listings most likley are 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 available, so finding a space for a small business might be tough.
Even though the median size is 13,000 sqft, there are still 0 new availabilities below 2,000 sqft. Most buildings in this region are close to 2 stories. Most buildings in this region were built in 1988 and are Class B.