The Down to Earth star recently broke ground on what he’s dubbed “FutureCave,” a sustainable home primarily made of cannabis plants, in Australia with designer Joost Bakker.

"Excited to get started on Zac's house!" Bakker wrote in a May 8 Instagram post that featured a group photo of himself, Efron and others on the crew. "Especially want to thank these two legends @main__frank for working so hard to get this project designed and approved!"

The High School Musical alum’s dream home will sit on a 128-hectare (about 316-acre) lot of land near the New South Wales and Queensland border that he purchased in 2020, per the Australian Financial Review. Much of its building material will be made from hemp sourced from a local farm.

But that’s not all. The mattresses, curtains and pillows Efron plans to have inside the residence will also be derived from the plant, according to Bakker, who told the outlet that he's also working with an appliance maker to potentially create a hemp drum-made washing machine.

In addition to six bedrooms, the home will also have a rooftop garden with a large living area.

So, why did Efron tap Bakker to design his new pad? "I've lived just about everywhere you can for several months or even years at this point," he told the Australian Financial Review in a December interview. "And I think if I had to look back at my whole life and think where do I ultimately want to end up, every time I go to Joost’s I have a sense of ‘this is actually what I want in life.' It just seems right. Like, that’s the way it should be done."

Plus, his Greatest Beer Run Ever costar Russell Crowe advised him to put down roots Down Under.

“Russell Crowe told me it's a good idea to get land in Australia; he did it when he was young, and it was one of the things he told me he is extremely proud of that decision," Efron explained. "It set him up really well for the future, and it’s a piece of advice and I followed it. I love Australia, it’s cool."

Amid construction on Efron’s home, Bakker has been giving updates on social media.

"For us @plantbord it’s just exciting that the farmers that grow our food can also make the materials we use to make the kitchens where we cook our food," Bakker wrote alongside a May 22 Instagram photo of himself and Efron in a field. "Although @zacefron kitchen and bathroom joinery will only use only 200 hundred boards (less than 1000 square metres of crop) if we embrace this product we have the potential to help farmers restore soil health in a natural way."

And, according to the environmental innovator, Efron “wants me to push my ideas as far as they can go.”"Zac fell in love with @futurefoodsystem and then our family home in Monbulk and now wants a home of his own,” he wrote in a November Instagram post. "So here we are - designing and building Zac’s home. Its a dream come true. Every element is pushing my team creatively and I love nothing more than testing so many ideas."