Underground at Allendale Square, the new name of the building’s revitalised two-level retail precinct, will boast 18 new tenants when it reopens in May.

Headlining the first round of announcements is confirmation that outpost number four of Mary Street Bakery will be one of the precinct’s street-level tenants: it’s exciting news for doughnut fans based on the eastern reaches of the CBD. Joining Mary Street Bakery along the Terrace will be Mo Espresso, which will introduce nitro cold-brew coffee and nitro iced tea to its new cafe, Mo Allendale. Downstairs, Thai restaurant Three Grains will feature among the new dine-in and takeaway food options.

Additional retailers – including some that will be making their West Australian debut – will be announced over the coming months. As well as helping connect Hay Street Mall and Elizabeth Quay, developers Mirvac hope the hub will also help city workers connect with each other.

“We wanted to create something unique,” says Mirvac’s Andrew Butler. “The underground concept is cutting-edge and grunge, but still has an intimate flair.”

Externally the building is also getting an update. At street level, Underground is all about maximising natural light: expect a glass-and-white chessboard, a glass canopy entrance and an alfresco, Wi-Fi-enabled dining area. Belowground, artworks from artist Anne Neil will add a touch of colour to the service area and arcade.

Underground at Allendale Square (77 St Georges Terrace, Perth) will open in May.