The typical asking rate per listing is in the $20's per square foot per year. The Buena Park region is going through a a boost in rates. In the last 3 months, the median rate went up $22 per sqft per year.
Compared to the rest of the Metropolitan Los Angeles market, the Buena Park region has lower rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 1 listings have been posted online, which means spaces are probably 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 1,100 sqft. Most buildings in this market are around 3 floors. Most buildings in this region were built in 1986 and are Class B.