On average, listings lease in the $30's per square foot per year. The Laguna Niguel region is experiencing a decline in rates. In the last 3 months, the median rate decreased $5 per sqft per year. That's a 14% decline in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Laguna Niguel region has smaller rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 12 listings have come on the market, which means leases most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. 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 1,090 sqft. Most properties in this market are close to 2 floors. Most buildings in this area were built in 1982 and are Class B.