Most listings are in the $60's per square foot per year. The McDonough submarket is going through a a rise in rates. In the last 3 months, the median rate rose $61 per sqft per year. That's a Inf% rise in rent.
Compared to the rest of the Metro Atlanta market, the McDonough region has more expensive rates, and you'll need to pay a premium to be in this hot region.
In the last 90 days, 4 listings have come on the market, which means leases most likley are leasing quickly. 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 130 sqft. Most buildings in this area are close to 1 floors. Most buildings in this area were built in 2007 and are Class B.