The typical asking rate per listing is in the $20's per square foot per year. The Rancho Santa Margarita region is seeing a an increase in rates. In the last 3 months, the median rate went up $21 per sqft per year.
Compared to the rest of the Metropolitan Los Angeles market, the Rancho Santa Margarita submarket has lower rates, so you should have no trouble finding a great deal in this discounted submarket.
In the last 90 days, 9 listings have been listed, which means spaces most likley are 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 1,050 sqft. Most buildings in this region are around 2 stories. Most buildings in this region were built in 2000 and are Class A.