The door, protected in the flat's lease, has become famous in Dunedin student circles.
The flat has featured in a documentary and in numerous newspaper articles.
Swani Harris (39), of Wellington, an original pink-door flat member, became concerned about the state of the door on a visit to Dunedin a year ago and after talking to ex-flatmate Barry Jenkins, it was decided a reunion and door restoration were needed.
"It was all falling to bits. So, it's a good excuse for a party really."
They organised to take over the flat for a week, relive their student days and restore the door to its former glory.
Those who had lived at the flat over the years had been invited to a reunion party this weekend, with 50-80 people expected.
Fellow pink door flatmate Marc Thomlinson (40), of Blackball, was "stoked" to know the door had lived on and that it was protected in the flat's lease.
While there were differing versions of how the door came about, he and Mr Harris believed it came from a couple of flatmates reminiscing about attending a Pink Floyd concert.
"We all loved Floyd."
Even funnier was seeing how the original flatmates, who were now spread around the world, had turned out.
He was a miner and Mr Harris a carpenter.
"I was this short haired rock'n roller, he [Swani] was a lotus, hippy dude. We were all musicians."
As part of the celebrations they planned to have a "jam" and record the music.
