Most listings are in the $0's per square foot per year. The Orange submarket is going through a decrease in rates. In the last 3 months, the median rate fell $26 per sqft per year. That's a 100% decline in rent.
In the last 90 days, 0 listings have come on the market, which means new listings are probably leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About NaN% of the office spaces in the Orange 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.
The standard measurement for office space in this area is around sqft. Most properties in this market are around 2 floors. Most buildings in this market were built in 1984 and are Class B.