Most listings are in the $20's per square foot per year. The Lilburn region is seeing a a rise in rates. In the last 3 months, the median rate rose $22 per sqft per year.
Compared to the rest of the Metro Atlanta market, the Lilburn region has lower rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 3 listings have been made available, which means leases are probably going fast. You'll want to be prepared to make an offer immediately. About 233% of the listings in the Lilburn are subleases, so you might be able to sign a shorter term by taking over a previous 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 720 sqft. Most properties in this area are around 1 stories. Most buildings in this area were built in 1986 and are Class C.