The building, next door to the Ashburton RSA on Cox St, has served the once-thriving Buffaloes group since it was established in 1927.
Today the cost of maintaining the ageing building is too much for the remaining four members, so they decided to sell it.
"We are hoping to be able to donate $500,000.
"It all depends if we will get someone in to buy it," Hanson said.
The lodge has made many donations to Canterbury organisations over the years.
The group has since spread throughout the world and is known as a fun fraternity for men of any religious or political views.
"It’s just a group of men that get together, have a beer and a yarn," Hanson said.
He said the four members - himself, Ted Tobin, Maurice Tait and Hamish Nish - will continue to run the group and meet monthly.
Two others from Christchurch also regularly attend their meetings and members from other Buffalo lodges around New Zealand visit occasionally.
Hanson thinks they may even end up hiring the hall they are now selling for the 100th anniversary of the lodge in 2027.
But now he is focused on moving the many relics - including framed sashes, glimmering badges and chains - out of the building.
The Ashburton Museum has taken many of the items, while others will go elsewhere.
Hanson thinks the Ashburton RSA may take the roll of honour showing the names of the many members of the lodge who served in World War 2.
