Bathla buyers in Wollongong say the developer's collapse has left them emotionally and financially distressed.
Some have had to move in with family while they wait for builds to be finished, while those in new homes are trying to get a litany of defects fixed.
The lender of one project has assumed control, promising it will be complete this year.
When 72-year-old Sue Mancuso put down a deposit for an apartment at The Sanctuary development in Wollongong in 2025, she was excited by the prospect of moving in before Christmas.
She did not expect to be living with her daughter, Marie Sinclair, 12 months after the Kembla Grange units were slated for completion.
"Luckily my daughter has helped us, otherwise we would have been homeless," Ms Mancuso said.
The 108-apartment complex was one of 45 active projects left unfinished when Sydney developer Bathla went into administration in August with debts totalling about $3.4 billion.
Ms Sinclair said the situation had taken an emotional and financial toll on her mother, who sold her family home and has had her furniture in storage for more than a year.
"It turns people's lives upside down and leaves them nowhere to go, really," Ms Sinclair said.
The development's lender, Balmain, said it was "98 per cent complete", but in a fresh blow this month, the Building Commissioner slapped the project with a prohibition order for serious defects.
Janice Cahill has been renting and paying storage fees since 2024, waiting for her apartment in the complex to be finished.
She had hoped the move would be a fresh start for her after losing her husband and father in the space of a year, and provide an accessible space to recover from the double knee surgery she had this month.
Instead, she will learn to walk again in her one-bedroom studio rental, with a 15-stair walk-up.
"Living in one room, not being able to go outside, it's depressing," Ms Cahill said.
Just a 10-minute drive south, Murray Twist and his partner put their life savings into one of 92 new townhouses at a Bathla development in Avondale.
He moved into the Avoca Park estate in July, months later than expected, and found a building riddled with defects.
"There were a lot of sleepless nights, and a lot of hope lost," Mr Twist said.
A building report listed around 100 defects, including a missing smoke detector, cracks in pavement, and missing grout in the shower.
"[The report] found poor quality of work and unsuitable for completion — there were pages and pages of defects," Mr Twist said.
Throughout the estate, several homes sit empty and incomplete; lights dangle from exposed wires on porches, and the beeps of low-battery fire alarms ricochet up and down the streets.
Mr Twist said Bathla employees initially fixed some of his home's defects, but since the collapse he had not had any contact with the developer's staff — about 60 per cent have been stood down across the state.
"We don't know who to turn to," he said.
While administrators secured funding for a small number of Bathla projects last week, the ABC understands Avoca Park is not one of them
The project's lender, Credit Connect Group, did not respond to the ABC's requests for comment.
In a statement, a Building Commission NSW spokesperson said it encouraged owners, customers and contractors to reach out to the administrator, Teneo, for further guidance.
It said the commission intended to reach out to impacted customers about "the relevant steps they should take in light of the situation".
For buyers in the Kembla Grange project, this month has delivered some renewed hope.
The CEO of Balmain, Andrew Griffin, confirmed it had appointed receivers and would complete the project with contingency funds.
He said they were working through the defects on the prohibition order.
"We are absolutely completing the project," Mr Griffin said.
Marie Sinclair said that news came as a relief for her mother.
"There's hope and light at the end of the tunnel for my parents," she said.