The typical asking rate per listing is in the $20's per square foot per year. The Los Alamitos region is going through a a rise in rates. In the last 3 months, the median rate went up $29 per sqft per year.
Compared to the rest of the Metropolitan Los Angeles market, the Los Alamitos region has less expensive rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 10 listings have been posted online, which means new availabilities are probably leasing quickly. You'll want to be prepared to make an offer immediately. About 30% of the office spaces in the Los Alamitos are subleases, so you might be able to find a shorter term or below market rent. 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 660 sqft. Most buildings in this region are around 2 floors. Most buildings in this market were built in 1973 and are Class A.