Formalities begin at 2pm.
The large building, at the northern end of the Ashburton A&P Association Showgrounds was open for display during the Ashburton A&P Show last year and, following council sign-off, was first hired by farm machinery company Norwood earlier this year.
The building includes a 30m x 20m club room and display area, an open plan kitchen/training room, toilets and a display space able to store large machinery or be used as additional undercover training facilities.
Club president John Stewart said members were thrilled to get the project over the line, and the clubrooms were already proving popular with machinery firms, which hired it for displays and for training.
Mr Stewart said the private hire was providing an income for the club. Rangitata MP Andrew Falloon will open the building.
''The public are welcome to come along and see the gear we have,'' Mr Stewart said.
The club is also in the early stages of organising its third Wheat and Wheels Rally, to be held on the Barrhill farm of member Anthony Hampton from April 1 to 3, 2022.
Previous shows were held at Peter Butterick's farm at Wakanui.
The theme for the rally is 175 Years of Massey and will feature daily parades, a military display, traction engines, food and craft stalls, a sprayer and spreader display, classic vintage cars, tractors and trucks, and some of New Zealand's largest tractors and combines.
Profits from the event will go to Ronald McDonald House.
