On average, listings lease in the $30's per square foot per year. The Lake County region is going through a a boost in rates. In the last 3 months, the median rate went up $12 per sqft per year. That's a 64% increase in rent.
In the last 90 days, 15 listings have been posted online, which means office spaces are probably leasing quickly. You'll want to be prepared to make an offer immediately. About 7% of the listings in the Lake County are subleases, so you will probably have to consider a longer term lease. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,140 sqft. Most properties in this region are around 1 stories. Most buildings in this market were built in 1982 and are Class A.