Nest has bought the former Scottish Queen pub on the ground floor of the listed complex on South Street.
It is the firm’s second site and will be open ‘by appointment’ to residential interior designers, contractors and members of the public when it opens in autumn.
Nest’s CEO and founder, Christian Hawley, said the industrial interior ‘perfectly encapsulates’ Sheffield’s history, while the ‘breathtaking’ views over the city centre would be great for photoshoots.
He added: “If you love concrete and modern brutalist buildings, then it doesn’t get any better, and when I first visited the space during an exhibition a few years ago I knew it would be the perfect location for Nest.
“I knew then that if we ever had the opportunity to acquire the site we would try and make it happen.”