Compared to the rest of the Metropolitan Los Angeles market, the Fullerton submarket has less expensive rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 21 listings have been listed, which means office spaces might be leasing quickly. You'll want to be prepared to make an offer immediately. About 5% of the available leases in the Fullerton are subleases, so you will probably need to consider the implications of signing a direct lease with the building. 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 1,010 sqft. Most buildings in this area are around 2 floors. Most buildings in this market were built in 1975 and are Class B.