On average, listings lease in the $20's per square foot per year. The Lilburn submarket is going through a a boost in rates. In the last 3 months, the median rate increased $4 per sqft per year. That's a 25% rise in rent.
Compared to the rest of the Metro Atlanta market, the Lilburn submarket has smaller rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 3 listings have been made available, which means office spaces might be going fast. You'll want to be prepared to tour spaces as quick as possible. 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 1,400 sqft. Most properties in this region are approximately 1 floors. Most buildings in this area were built in 1986 and are Class C.