The typical asking rate per listing is in the $30's per square foot per year. The Aliso Viejo region is going through a decline in rates. In the last 3 months, the median rate decreased $6 per sqft per year. That's a 15% decline in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Aliso Viejo submarket has less expensive rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 11 listings have been listed, which means spaces might be going fast. You'll want to be prepared to make an offer immediately. About 9% of the available space in the Aliso Viejo 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 1,300 sqft. Most buildings in this market are approximately 2 stories. Most buildings in this area were built in 1999 and are Class B.