Most listings are in the $30's per square foot per year. The Altadena submarket is experiencing a a boost in rates. In the last 3 months, the median rate went up $31 per sqft per year.
Compared to the rest of the Metropolitan Los Angeles market, the Altadena region has less expensive rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 0 listings have been posted online, which means listings most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. About NaN% of the listings in the Altadena are subleases, so you will probably need to sign a longer term lease with the landlord directly. 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 33,990 sqft, there are still 0 spaces below 2,000 sqft. Most properties in this area are close to 1 floors. Most buildings in this market were built in 1946 and are Class A.