Most listings are in the $20's per square foot per year. The Orange submarket is experiencing a an increase in rates. In the last 3 months, the median rate went up $5 per sqft per year. That's a 22% increase in rent.
In the last 90 days, 4 listings have been made available, which means listings might be going fast. You'll want to be prepared to make an offer immediately. 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 2,350 sqft. Most properties in this market are close to 2 stories. Most buildings in this region were built in 1984 and are Class B.