The last resident of Sydney's controversial Sirius building moved on but the battle continues

After years of battling to stay in one of Sydney's most controversial buildings, the sole remaining resident of the Sirius building has finally been forced to pack up and leave.

Myra Demetriou, 91, has finally left of her home in The Rocks as the state government moves to sell the public housing building.

But campaigners are launching a new bid to save it from demolition despite the building finally becoming vacant after the Ms Demetriouy shown the door following a lengthy battle.

"Nobody else would put up a fight and I'm a fighter from way back so they couldn't move me out," she said.

As the pensioner reaches the end of her life, she revealed the upheaval was far from ideal for a woman of her age.

"The packing is a pain in the neck I can tell you now."

The unrivalled multi-million dollar views across Sydney Harbour never meant much to Ms Demetriou, who's legally blind, but Sirius was home.

"It was specially made for the people like myself you know," she said.

The building opened in 1980 to house 200 people who had been displaced by the redevelopment of The Rocks throughout 1970s. Ms Demetriou has been a permanent fixture in Sirius since 2008.

Now on the market for $100 million, the government have insisted the return would fund more public housing.

Ms Demetiou had become the face of the effort to stop the demolition of the public housing block which has support from several prominent figures.

"From every point of view social environmental heritage and community what is happening here is wrong," Sydney Lord Mayor, Clover Moore, said.

Ms Demetriou was farewelled by supporters on Saturday before moving to her new accommodation in Pyrmont.

"Myra is the sort of person that makes a suburb into a community," Sydney MP Tanya Plibersek said.

But as she leaves Sirius for one final time, campaigners say the battle to save the iconic brutalist structure isn't over yet.

The Save Our Sirius group plans a $100 million bid to buy the building before restoring it and keeping 40 per cent of it as social and affordable housing.

If successful, Ms Demetriou's apartment has been selected to home a young woman and her family.

"We're still fighting," was the message from Ms Demetriou who plans to take the battle with the government all the way.