The centre - which houses 29 people with disabilities - will close by the end of 2016.

Ms Wooldridge said clients were being informed of their future as part of the transition phase.

She said 28 of 29 clients have had their client plans finalised.

But the Health and Community Sector Union said there were unanswered questions about what would happen to staff, and what sort of accommodation clients would move in to.

Union state secretary Lloyd Williams said the client plans stopped short of providing any certainty about the future.

"The client assessment process has no relevance to providing staff, residents and families with the fundamental assurance that residents and staff will not be worse off," he said.

He said staff want a guarantee their wages, conditions and job security would not be reduced and residents and families want to know that there would be existing qualified and experienced staff there for them when they move.

The state government has committed $7.9million toward the transition of the Sandhurst Centre closure.

Ms Wooldridge said that included consultations with families, advocates, residents and staff. 

She said the planning process has looked at resident needs, their accommodation preferences and their individual support requirements.

"Through the planning process we’ve identified ways that we can innovate when developing new homes," she said.

Ms Wooldridge said the process had delivered valuable insights that will help ensure the best outcomes for residents as they move out of congregate care into community living. 

She said the next step would be looking at housing types.

“The project is now moving into the design phase with new services for residents including accommodation, day and residential support."

But Mr Williams said Ms Wooldridge has failed to respond to specific issues and the real concerns of staff, residents and families.

"It's been 281 days since the closure announcement. It’s time for Minister Wooldridge to come clean.”