In the last 90 days, 3 listings have come on the market, which means leases are probably going fast. You'll want to be prepared to make an offer immediately. About 167% of the listings in the Orange 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 posted, 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 approximately 1 stories. Most buildings in this market were built in 1984 and are Class B.