In the last 90 days, 439 listings have come on the market, so you'll want to check back regularly for new listings. About 3% of the listings in the Orange County 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 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 2,400 sqft. Most properties in this market are approximately 2 stories. Most buildings in this area were built in 1986 and are Class A.