Compared to the rest of the Metropolitan Los Angeles market, the La Mirada region has less expensive rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 5 listings have been listed, which means new availabilities are probably leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 40% of the available space in the La Mirada 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 650 sqft. Most buildings in this area are close to 1 stories. Most buildings in this market were built in 1983 and are Class A.