The property portfolio of the New South Wales Government would be the envy of any real estate mogul.

Key points: Over 750 homes, from Cootamundra to Cronulla, accommodate some of the most vulnerable people

Over 750 homes, from Cootamundra to Cronulla, accommodate some of the most vulnerable people The State Government has announced it sold off rights to care for people in government-run homes

The State Government has announced it sold off rights to care for people in government-run homes Kerry Stratton's son has already sensed the impact of uncertainty

There are the priceless harbour-front buildings like the Opera House, claimed in the name of the Crown, but there are also the lesser-known properties under the ownership of the NSW Minister for Disability Services.

At present they include more than 750 specially fitted-out homes — stretching from Cootamundra to Cronulla — that accommodate some of the state's most vulnerable people.

Documents obtained by the ABC put the land and building portfolio of this disability housing at a value of about $830 million.

Now the NSW Government has confirmed it has a long-term plan to sell off these homes as part of the move to a National Disability Insurance Scheme (NDIS).

NSW Disability Services Minister Ray Williams said in the medium term the properties would be leased to private community housing providers under five to 10-year agreements. But after that, they would be sold.

"The Government is maintaining those particular assets into the foreseeable future, so initially any government assets we own will initially be leased to service providers," he said.

"Down the track we will work through a strategy, an appropriate strategy and a sympathetic strategy to divest of those particular government assets."

Last week, the State Government announced it had already sold off the rights to care for people in NSW government-run homes using a controversial tender process.

It was criticised for favouring organisations with lots of money and giving people less choice.

The new announcement about selling the properties has raised questions about the future of the residents and whether the taxpayer would actually get market value.

Jim Simpson from the NSW Council for Intellectual Disability said the Government must ensure people's homes are protected.

"That real estate must remain available to people with a disability long term," he said.

'People with disability need guarantees'

The sell-off is unwelcome news for mothers like Kerry Stratton, whose son Matthew has severe autism.

Matthew has lived in a group home on the NSW south coast since 2007, where he has flourished.

Ms Stratton described her experience of privatisation to date as "shambolic" and said it did not bode well for the future.

"We don't even know who's going to manage the repairs on the properties," she said.

Ms Stratton said Matthew had already started to sense the impact of uncertainty.

"At the beginning of last year Matthew started to pick up signals from people that all wasn't well," she said.

"He entered into a period of terrible depression and I had to have that treated.

"People with a disability have high needs, they need continuity and they also need guarantees their life will not be upset by sell offs."