On average, listings lease in the $10's per square foot per year. The Marietta region is seeing a decline in rates. In the last 3 months, the median rate fell $2 per sqft per year. That's a 10% decline in rent.
Compared to the rest of the Metro Atlanta market, the Marietta submarket has less expensive rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 42 listings have come on the market, so you'll want to check back regularly for new listings. 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 2,500 sqft. Most properties in this area are approximately 2 floors. Most buildings in this market were built in 1986 and are Class B.