The new Greenhouse bar in Perth's CBD, made from recycled and recyclable materials, is completely covered in strawberry plants.

A gas cylinder gets a new lease on life inside the bar, as do various bits and bobs, like the jars used as glasses.

The floors inside Greenhouse are made from recycled car tyres, furniture is made from packing crates and old wire is transformed into light shades.

Old road signs have been made into unique furniture for Greenhouse.

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Perth residents have welcomed a new, sustainably-designed addition to their inner CBD, with the opening of the unique 'Greenhouse' bar.

Not only is the garden and bar made entirely from recycled and recyclable materials, with floors made of recycled car tyres, furniture crafted from packing crates and retired road signs and old wire twisted into new lampshades, Greenhouse is good enough to eat - literally.

The exterior walls host 4,000 pots planted with cascading strawberries, and the rooftop garden grows many many of the herbs, fruit and vegetables that the European-style bar uses in its menu. Food scraps are fed back into the garden's worm farm, and there are even plans to start a beehive, which will produce the honey used in the Greenhouse's dishes.

Designed by Melbourne floral artist and 'waste wizard' Joost Bakker, the bar was originally conceived of as a pop-up installation in Melbourne's Federation Square. After a warm reception there, it has moved to Perth on a permanent basis.

Bakker was inspired by the unique design of his own family home in Monbulk, Victoria, as well as years of experience turning trash into treasure. He said he wanted to create a rooftop garden which was not only self-sustaining, but that would not leave a trace of itself once dismantled.

"The idea was that the building could be totally pulled apart and recycled - every single bit," he said.

As well as including heavily recycled and recyclable components, Bakker's realised vision also includes wall cavities filled with fire-safe straw bales, providing insulation for the building without the need for large cooling or heating systems.

One of the key messages of the project, Bakker said, is to show "that there's not just one way of doing things - there's all sorts of possibilities and all sorts of solutions."

For example, Bakker believes rooftops are an untapped resource which could transform the way we grow and consume food. He points out that regular suburban lawns take up lots of space and resources and are often covered by shade, which can make growing some fruits and vegetables difficult.

"The average house in Australia is 28 square metres, and if you just had the external part of the house planted with vegie bins, it would be enough to provide four families with," he said.

"It's amazing how much you can grow, especially when you've got it on your roof."