It brought appeal costs on the Policy Statement to $806,000 over three years.
Pollution prevention, including investigations and prosecutions, totalled $312,000 over the six years. Appealing Tauranga City Council's City Plan cost $108,000 in 2013.
The regional council's most expensive areas for legal advice were resource regulation totalling $2.8 million over the six years and strategic policy $1.6 million.
Western Bay's most expensive legal battle was the $232,000 in lawyers' costs to fight appeals against Matakana Island's planning change.
Legal fees for District Plan appeals totalled $130,000 over the six years.
Settlement of the Athendale Property Ltd claim cost nearly $92,000 while a prosecution taken by the New Zealand Historic Places Trust in 2011 cost $18,000 to defend.
Other big legal bills included excess settlement and cost recovery worth $43,000 for Valley View Rd (Kaimai) in 2010.
Stormwater issues cost around $160,000 each in Tauranga and Papamoa and hearings for the Tara Rd designation totalled $131,000.