First it was guest parking spots. Then swimming pools, gyms, tennis courts, private dining rooms, libraries and concierges. Even private parks and gardens.
Now guest apartments have emerged as the bolt-on extra apartment buyers should look for.
The idea came to developer Martin Strode from SMA Projects as he contemplated his large 358-apartment and townhouse development at Collingwood's Yorkshire Brewery site.
''I was looking for an edge, and it just came to me,'' he said.
The two guest apartments, a one and two-bedder, will only be available to friends and family of residents. Guests will be charged $90-$120 a night to cover cleaning and utilities costs, and the apartments will only be available for short-term bookings - not a month at a time.
The share apartments are a step up from share cars or parking spots, and Mr Strode said he was unaware of anything similar in Melbourne. He said the developer would own the two apartments and usage charges would not be added to body corporate fees.
The heritage site includes a six-storey brew tower - the tallest building in Melbourne for a decade in the late 19th century. The tower will be renovated to include new ''loft'' apartments. Designed by Hayball architects, the development is on the scale of a small village, with its own piazza and shops. It is not without controversy.
While the site had been vacant since 1996, Yarra Council was not impressed with the impact the development plan would have on the site's heritage value.
In 2012 then mayor Geoff Barbour said the 17-storey tower would ''diminish the significance of the iconic brew tower and dominate Collingwood's skyline''.