Twenty-something siblings Grace and Pierce Roseby have just put down a deposit on a new off-the-plan apartment, but they don’t expect it will be too much of a wrench to finally leave home when it’s finished.

That’s because their mum and dad will be living just across the corridor in an apartment they’ve bought in the same building; close enough for the kids to visit for dinner – or to have their washing done.

“I think it will work out really well,” says Grace, a schoolteacher aged 25. “When we sell our big family home and we all move, it will mean we’ll have more independence and more financial responsibility. It will be the best of both worlds.”

Grace and Pierce, 23, who works in tech sales and plays VFL football for the Sydney Swans reserves, went halves on the deposit for a $1.9 mill

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