On average, listings lease in the $30's per square foot per year. The Calabasas region is going through a a rise in rates. In the last 3 months, the median rate rose $6 per sqft per year. That's a 20% increase in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Calabasas submarket has higher rates, and you'll have to negotiate above asking rent to be in this hot submarket.
In the last 90 days, 6 listings have come on the market, which means leases most likley are leasing quickly. You'll want to be prepared to make an offer immediately. 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 2,960 sqft, there are still 0 listings below 2,000 sqft. Most properties in this market are around 2 floors. Most buildings in this region were built in 1990 and are Class A.