"There hasn't been a consistent reassessment process in the Fulton County tax assessor's office," Rob Metcalf, managing director of JLL's Atlanta office, tells GlobeSt.com. "Some properties haven't been revalued in the last ten years or so. There's a huge discrepancy in the last valuation that occurred."

Many of the estimated property tax increases appear somewhat normal for the city's landmark buildings such as Bank of America Plaza in Downtown Atlanta, which faces 18% higher taxes of $6.7 million this year compared to what it paid for 2007, according to JLL figures. Other trophy assets with big tax bills include Midtown's One Atlantic Center at $4.2 million, up 30%, and Downtown's 191 Peachtree at $2.5 million, up 73%.

Other properties face percentage increases in triple digits, and quadruple in one rare case. The Pinnacle office tower in Buckhead, which changed hands in recent years, faces a 208% higher tax bill of $3.7 million this year, and Two Peachtree Pointe in Midtown saw its property taxes go up 316% to $1.5 million.