The typical asking rate per listing is in the $20's per square foot per year. The San Dimas region is experiencing a decrease in rates. In the last 3 months, the median rate fell $1 per sqft per year. That's a 3% decline in rent.
Compared to the rest of the Metropolitan Los Angeles market, the San Dimas submarket has less expensive rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 25 listings have been posted online, which means office spaces most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 12% of the available leases in the San Dimas are subleases, so you might be able to snag a great spot on a short term. 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 24,500 sqft, there are still 0 new listings below 2,000 sqft. Most properties in this area are approximately 2 floors. Most buildings in this region were built in 1988 and are Class B.