Most listings are in the $20's per square foot per year. The Santa Ana region is seeing a an increase in rates. In the last 3 months, the median rate rose $1 per sqft per year. That's a 3% increase in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Santa Ana region has less expensive rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 178 listings have been listed, so you'll want to check back regularly for new listings. About 3% of the available space in the Santa Ana 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.
Even though the median size is 2,630 sqft, there are still 0 leases below 2,000 sqft. Most buildings in this area are close to 2 stories. Most buildings in this market were built in 1982 and are Class B.