Compared to the rest of the Metropolitan Los Angeles market, the Tustin submarket has smaller rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 27 listings have been made available, which means office spaces are probably leasing quickly. You'll want to be prepared to make an offer immediately. About 63% of the listings in the Tustin are subleases, so you might be able to snag a great spot on a short term. 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 1,730 sqft. Most properties in this area are approximately 2 floors. Most buildings in this region were built in 1980 and are Class B.