Most listings are in the $30's per square foot per year. The Altadena submarket is going through a decrease in rates. In the last 3 months, the median rate fell $2 per sqft per year. That's a 5% decrease in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Altadena submarket has less expensive rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 6 listings have been posted online, which means spaces 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 12,670 sqft, there are still 0 spaces below 2,000 sqft. Most properties in this region are close to 1 floors. Most buildings in this area were built in 1946 and are Class A.