Most listings are in the $20's per square foot per year. The Lake Forest region is seeing a decline in rates. In the last 3 months, the median rate decreased $3 per sqft per year. That's a 10% 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 undervalued region.
In the last 90 days, 29 listings have been posted online, which means new listings most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. About 41% of the listings in the Lake Forest are subleases, so you might be able to snag a great spot on a short term. 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 1,190 sqft. Most buildings in this market are close to 2 stories. Most buildings in this region were built in 1999 and are Class B.