On average, listings lease in the $30's per square foot per year. The La Cañada Flintridge region is going through a decline in rates. In the last 3 months, the median rate decreased $6 per sqft per year. That's a 15% decline in rent.
Compared to the rest of the Metropolitan Los Angeles market, the La Cañada Flintridge submarket has greater rates, and you'll have to negotiate above asking rent to be in this hot submarket.
In the last 90 days, 8 listings have come on the market, which means new availabilities might be leasing quickly. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,000 sqft. Most buildings in this area are close to 2 floors. Most buildings in this area were built in 1994 and are Class B.