Compared to the rest of the Metropolitan Los Angeles market, the Fullerton region has smaller rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 15 listings have come on the market, which means office spaces are probably leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 7% of the office spaces in the Fullerton are subleases, so you will probably have to consider a longer term lease. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
Even though the median size is 3,010 sqft, there are still 0 listings below 2,000 sqft. Most buildings in this region are around 2 floors. Most buildings in this area were built in 1975 and are Class B.