Most listings are in the $20's per square foot per year. The Lake Forest region is experiencing a decline in rates. In the last 3 months, the median rate fell $2 per sqft per year. That's a 5% decline in rent.
Compared to the rest of the Metropolitan Los Angeles market, the Lake Forest region has less expensive rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 34 listings have been listed, which means office spaces are probably leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 3% of the listings in the Lake Forest are subleases, so you will probably need to sign a longer term lease with the landlord directly. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
Even though the median size is 3,660 sqft, there are still 0 new listings below 2,000 sqft. Most buildings in this area are around 2 stories. Most buildings in this region were built in 1999 and are Class B.