On average, listings lease in the $10's per square foot per year. The Buena Park submarket is experiencing a a boost in rates. In the last 3 months, the median rate increased $20 per sqft per year.
Compared to the rest of the Metropolitan Los Angeles market, the Buena Park submarket has lower rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 2 listings have been posted online, which means new listings are probably leasing quickly. You'll want to be prepared to make an offer immediately. About 100% of the listings in the Buena Park are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 1,900 sqft. Most buildings in this market are close to 2 stories. Most buildings in this area were built in 1986 and are Class B.