The typical asking rate per listing is in the $20's per square foot per year. The Orange County region is seeing a a boost in rates. In the last 3 months, the median rate increased $5 per sqft per year. That's a 31% rise in rent.
In the last 90 days, 32 listings have come on the market, which means new listings are probably going fast. You'll want to be prepared to make an offer immediately. About 13% of the listings in the Orange County are subleases, so you might be able to sign a shorter term by taking over a previous 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 5,000 sqft, there are still 0 office spaces below 2,000 sqft. Most properties in this area are close to 2 stories. Most buildings in this market were built in 1985 and are Class A.