The business is expected to pop out of its current location on Cimitiere Street later this year to allow for the construction of a new seven-storey development, which is being championed by health insurer St.LukesHealth.

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The $27 million development would bring together the insurance giant's four disparate offices into one timber-and-glass complex, with Bread + Butter expected to retake pride of place on the ground floor.

Until then, however, owners Rob and Olivia Morrison are planning to move Bread + Butter's cafe and bakery to 70 Elizabeth Street, across from Prince's Square, a location which the couple intends to incorporate into the cafe's temporary iteration.

"Well, as we'll be opposite the square will probably offer some picnic, blankets and baskets, and people can grab a coffee and a sandwich and take it over there - and then they can just bring the blanket and the basket back," Mr Morrison said.

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Two-storey, heritage-listed property retains some of the warehouse feel Bread + Butter patrons have become accustomed to - a feeling Mrs Morrison hopes to retain following construction back at Cimitiere Street.

"The new design intends to salvage as many of the current fixtures that make us what we are. It's quite a unique warehouse building, and we need to reflect that in the new design. We don't want to lose it - that's really important to us," she said.

While the couple admitted they'd poured a lot of "blood sweat and tears" into their current location, they also expressed excitement at the opportunities a new build presents.

"You don't often get a chance to do things from scratch again. So it's quite exciting in a way. We know a lot more now than we did three years ago, so it'll be more of an enhanced version of what we stand for," she said.

"It's given us a chance to really delve deep into why we operate and what we're good at and really specialise. We really want to get as much as we can out of the new space."

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But, despite the revamp, Mrs Morrison was eager to assure patrons that, once back at Cimitiere Street, Bread + Butter will continue doing what it does best.

"We'll be doing the same offerings, open 365 days a year, baking on site, and providing great coffee and food," she said.

Excitingly, the couple intend to retain the new lease once they move back into Cimitiere Street, though what they will make of the Elizabeth Street locale remains a mystery. Speaking more broadly about the St.LukesHealth development, Mrs Morrison believes it'll be a fine addition to the area.

"They've really thought about the space and how it's going to fit into the city."

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