The typical asking rate per listing is in the $30's per square foot per year. The Rancho Santa Margarita region is going through a an increase in rates. In the last 3 months, the median rate went up $3 per sqft per year. That's a 11% rise in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Rancho Santa Margarita region has more expensive rates, and you'll have to negotiate above asking rent to be in this hot region.
In the last 90 days, 10 listings have been made available, which means listings might be leasing quickly. 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 1,150 sqft. Most buildings in this area are around 2 stories. Most buildings in this market were built in 2002 and are Class A.