The typical asking rate per listing is in the $30's per square foot per year. The San Dimas region is experiencing a a rise in rates. In the last 3 months, the median rate increased $14 per sqft per year. That's a 58% increase in rent.
Compared to the rest of the Metropolitan Los Angeles market, the San Dimas region has greater rates, and you'll have to negotiate above asking rent to be in this hot region.
In the last 90 days, 25 listings have been posted online, which means spaces most likley are going fast. You'll want to be prepared to make an offer immediately. About 12% of the listings in the San Dimas are subleases, so you might be able to find a shorter term or below market rent. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
Even though the median size is 4,160 sqft, there are still 0 new availabilities below 2,000 sqft. Most properties in this region are around 2 stories. Most buildings in this market were built in 1988 and are Class B.