Most listings are in the $30's per square foot per year. The Alpharetta submarket is going through a an increase in rates. In the last 3 months, the median rate increased $5 per sqft per year. That's a 17% increase in rent.
Compared to the rest of the Metro Atlanta market, the Alpharetta submarket has higher rates, and you'll have to negotiate above asking rent to be in this hot region.
In the last 90 days, 91 listings have come on the market, so you'll want to check back regularly for new listings. About 1% of the listings in the Alpharetta are subleases, so you will probably have to consider a longer term lease. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
Even though the median size is 3,810 sqft, there are still 0 leases below 2,000 sqft. Most properties in this region are around 3 floors. Most buildings in this region were built in 1998 and are Class A.