Compared to the rest of the Metropolitan Los Angeles market, the Costa Mesa region has less expensive rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 49 listings have been made available, so you'll want to check back regularly for new listings. About 2% of the office spaces in the Costa Mesa are subleases, so you will probably need to sign a longer term lease with the landlord directly. 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 2,640 sqft, there are still 0 new listings below 2,000 sqft. Most buildings in this area are around 2 floors. Most buildings in this market were built in 1982 and are Class A.