The typical asking rate per listing is in the $30's per square foot per year. The South Pasadena region is going through a a rise in rates. In the last 3 months, the median rate went up $2 per sqft per year. That's a 7% increase in rent.
Compared to the rest of the Metropolitan Los Angeles market, the South Pasadena submarket has greater rates, and you'll need to make a great offer to be in this hot submarket.
In the last 90 days, 5 listings have come on the market, which means spaces 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.
The standard measurement for office space in this area is around 1,500 sqft. Most buildings in this region are close to 2 floors. Most buildings in this area were built in 1950 and are Class B.