The typical asking rate per listing is in the $10's per square foot per year. The Whittier region is seeing a a rise in rates. In the last 3 months, the median rate rose $18 per sqft per year.
Compared to the rest of the Metropolitan Los Angeles market, the Whittier submarket has less expensive rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 5 listings have been listed, which means listings most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 520% of the available space in the Whittier are subleases, so you might be able to snag a great spot on a short term. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 580 sqft. Most buildings in this area are around 2 floors. Most buildings in this region were built in 1974 and are Class C.